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understanding a photography histogram

This is just a short explanation of using histograms. Today’s DSLR photo tip, the photo histogram explained, involves using the (gulp) histogram. To engage live histogram, you will need to use the LCD screen of your camera to photograph instead of optical viewfinder (Live View mode).  Most modern-day digital cameras have some histogram to display if your image is correctly presented. Thank you. A histogram is basically a tonal distribution graph which graphically represents the pixels exposed in an image. In this article for beginners, I will try to teach you how to understand histogram. A histogram is a graphical representation of the tonal values of your image. Histograms usually display information for three primary colors – red, green and blue – and are known as RGB histograms. Thanks for explaining the histogram, never really known exactly how to read it but this article is very helpful. This is why understanding histograms is crucial. Clearly, if we examine the photograph, the coat is more or less the darkest element of the photograph (along with the fake leather of my Kiev 4AM rangefinder). DSLR’s mainly show a live histogram so you can adjust your settings while composing a shot. Hopefully, this article helped you to understand what histograms show and how to read them. This was very helpful in explaining how to read a histogram. Histograms are graphs of your camera’s pixels that specifically show brightness. CAMERA HISTOGRAMS: LUMINOSITY & COLOR. Understanding The Histogram March 6, 2019 / in Images, News, Rambles / by Chris Gheen. Finally, we end up with a small amount of highlights. As shown in the image above, dark tones are displayed on the left side of the histogram. This is another of those features found on most of the higher end cameras that you probably aren’t using. How to Fix Light Leaks in Long Exposure Photography, Tips for Photographing the Great Conjunction. Histograms can be found in most modern cameras. Histogram is exposure-dependent, but is also affected by tone curve and other settings. Some photographers made a habit of glancing at histogram on the back of their camera LCD screen after each shot – mostly to check whether there are any tones at the extreme edges that would indicate loss of detail in dark or light areas. Once you are familiar with histograms, you can assess the exposure and contrast of your photo, then make changes to it where needed. There are claims on the internet that one or another histogram shape should be perfect and that it is the shape to aim for in all your photography, the perfect histogram. 5) Should you Set Exposure using Histogram? In other words, it shows the amount of tones of particular brightness found in your photograph ranging from black (0% brightness) to white (100% brightness). Both these areas are small, but noticeably lighter than the background. As shown in the image above, dark tones are displayed on the left side of the histogram.  When shooting high key images, you want the information to expose to the right more. The “correctness” of it depends on too many factors, not the last of which is your vision as well as the scene you are photographing. Z6 II vs Z7 II – which one is better for enthusiast.  DSLR’s mainly show a live histogram so you can adjust your settings while composing a shot. First, let’s try to break down what it is exactly that is represented in the histogram. The parts of a histogram on the X-axis are the range from pure black to pure white values. Yellow, cyan and magenta appear where two of the channels overlap.  It can be a little tricky trying to understand them at first, but once you know how it works, it is pretty easy to use them to shoot your image depending on what field of photography you are in. See instructions, One of the most significant problems for time-lapse photography during …, Timelapse photography is a fun part of photography.  There are …, Night Photography with the right equipment is a subject that …, Apps for mobile phones & tablets have been around for …, South Pembrokeshire is an excellent location for Astrophotography photographers to …. Vertical axis of a histogram displays the amount of tones of that particular lightness. There are two types of histogram.  They are useful things to use but should not be relied on all the time as it depends on the scene or situation you plan to shoot. Not quite. Such persistent inclusion would suggest that histograms are quite important. What are the Different Types of Histogram? Your email address will not be published. As you can see, there are barely any tones at the extreme left-side of the histogram, where blacks are shown, which means there is no detail lost in shadows. The image that goes along with this histogram is … Although RGB histograms are the most commonly used histogram, other types are more useful for specific purposes. However, you must remember that it all depends on the scene. Here’s a sample photo paired with its histogram: If you look at any histogram, you will notice two axes – horizontal and vertical. So the meaning of such persistent inclusion suggests that histograms are very important. As you can see, the histogram confirms that the image is much too bright – it is shifted strongly to the right. Quite a few photographers are thus used to evaluating exposure based on histograms alone and state them as either “good” or “bad”. A histogram is simply a graphic representation of the exposure levels within an image.  But it is not necessarily true when shooting particular scenes. Using the histogram is the only foolproof way of analyzing if an image is too dark or too bright Ultimately, understanding the histogram will help you improve your photos and make them more balanced. I hope you like it! 1. In other words, it shows the number of tones of particular brightness found in your photograph ranging from black (0% brightness) to white (100% brightness). You will notice that it consists of several diagrams marked with different colors. Understanding the Histogram on a DSLR. There is nothing wrong or shameful with that, as histograms may appear to be rather complex at first. This helps you to get the best photo possible when out on a shoot. Hopefully, by the end of this tutorial, you will learn to “read” them and see if they are useful to your photographic needs. Should I alter my exposure settings and aim for the “good” histogram, this photograph would be much too dark. But you should! Using the correct technique of exposure, if you under expose the image, this is what you get: Note: If your monitor is not properly calibrated, you will see everything dark and no details in black.But check the histogram, the graph ends well with in the left side vertical line, which means we have good exposure where we can see details in the black area. As an example, I will use Photoshop to overexpose & underexpose the image above to show how the histogram moves. Note that the spike ends with blue channel – it represents the tones of my scarf. As long as you keep that in mind, in general, there is no “good” or “bad” histogram. However, would you say that the image above is not exposed properly? Usually, a “good” histogram would render most tones in the middle portion of the graph, and no or few tones would be found at the extreme edges. Many current DSLR cameras have live histograms that react to scene in real time. If you were to judge the exposure of this particular photograph based on the histogram alone, you would probably say it is overexposed considerably. Histogram merely shows you the amount of tones of various brightness levels in your image, and nothing more. Histograms give you a mathematical representation of how well exposed a photo is.  The same can be said for underexposing. Then we see our histogram spike up quickly again. Read this article to learn about each of these three exposure settings. A student and a wedding photographer with a passion for cinematography and writing.  More importantly, any information that is more to the left (blacks) or the right (whites) will risk a loss of exposure or information. ... A histogram is a useful tool for understanding and accurately exposing your images. We can find them in the lightest portions of the sky as well as the camera I’m holding. It is a simple graph that displays where all of the brightness levels contained in the scene are found, from the darkest to the brightest. There is barely any sign of midtones, let alone shadows. Histograms are useful tools to determine how well an image is exposed. Some are used to seeing histograms as graphical representations of exposure. These values represent the background, which is moderately bright and takes up the biggest portion of this particular photograph. The histogram is taken from the below image. Highlights (whites) are represented on the right side. a topic that we could (and probably should) spend a lot of time talking about but let me give you a very brief answer to get you through in the short term The region where most of the brightness values are present is called the \"tonal range.\" Tonal range can vary drastically from image to image, so developing an intuition for how numbers map to actual brightness values is often critical—both before and after the photo has been taken. When looking at histograms in photography, the darks are represented on the left, mid-tones in the middle, and lights on the right. A histogram is a graph that shows us the current tonal range of an image so we can evaluate it and, if necessary, correct it. It is sufficiently dark, yet still bears enough detail. A histogram is a specific visual representation of data, usually a graph using bars without spaces to represent the number of incidents in a distinct group or sample set. The purpose of a histogram is to give the photographer a more accurate representation of brightness values than even trained eyes can pick up on. The key to getting a good exposure is keep everything near the mid-tones as best as possible. The middle portion of the histogram represents midtones, which are neither dark nor light. If we agree with such an approach, the histogram shown at the top of this article would represent an image that is ever so slightly underexposed (tones are shifted slightly to the left), but mostly ok. Let’s see if such a theory is correct by examining the following photograph. Photo Extension Histogram itunes.apple.com/us/ap…16191?mt=8. Histograms have made their place in every image editing software these days, and to master photography, you need to try understanding photography histograms.. Follow me on Google+, Facebook or visit my wedding photography website to see some of my work. Can you see a small amount of midtones displayed in the histogram? In photography, a histogram is a graph showing the distribution of light in an image. https://www.naturettl.com/understanding-histograms-and-how-to-use-them Generally we use a combined histogram of the three main colour channels (red, green and blue) or RGB histogram. A critical tool in your development as a photographer is an understanding of, and the use of, the Histogram.Chuck Haacker says…“My background was all in analog (film). Histograms are very useful - but there are 3 things MOST people don't understand.Look at the shots I have included, video and still. A “bad” histogram would have tones at the very edges of the graph, which would basically mean either underexposure to the point of lost shadow detail (shadow clipping), or overexposure to the point of lost highlight detail (highlight clipping), or even both in a single image. There are many variables can affect the photo's histogram. Many tones are very bright and there are basically no darker tones.  For example, a night scene will have lots of darks due to the sky. And if you feel it may be an unnecessary step for you, there’s nothing wrong with that either. This is quite useful. In photography, the histogram is used as a reference to help you understand the levels of light and color in a particular image. To see this page as it is meant to appear, please enable your Javascript! Then we see it spike – as mentioned earlier, this portion of the histogram shows the tones of my black coat. You’ll find an histogram on the screen at the back of your camera, and you’ll also find one in your RAW processor like Lightroom or Capture One, and then you also have access to an histogram in Photoshop. If you are involved in the observation of statistics or looking at any kind of technical data, you may need to be able to read a histogram. As you move rightward, tones get lighter. The easiest way to explain the histogram is to say it’s a graphical representation of an image’s light levels. Z6ii vs. Z7ii which has better tonal gradation? This website uses cookies to ensure you get the best experience on our website, Sky Watcher Star Adventurer Timelapse Review, Equipment & Accessories for Night Photography, Astrophotography Sites in South Pembrokeshire, St Catherines Island White Border Canvas Print, Pembroke Dock Dockyard Chapel White Border Canvas Print, Privacy Policy / Cookie Policy / General Data Protection Regulation. Histograms can be found in almost any modern image editing software. I don't believe this to be the case. It is a product shot of a couple of earrings. PL provides various digital photography news, reviews, articles, tips, tutorials and guides to photographers of all levels, By Romanas Naryškin 57 CommentsLast Updated On April 25, 2020. Histograms are useful tools to determine how well an image is exposed. It can be used to discover whether you have clipped any highlight or shadow detail at specific exposure settings. There are five separate groups defined in the histogram. wow great article, that diagram on my phone has been driving me up the wall trying to figure out what it was measuring…, It doesn’t make you more of a professional if you use the histogram, but learning how to read it can be invaluable at times, this is the real truth !! The impressive article, I learnt a lot about Histograms here. Any other portion of the image is significantly lighter.  When underexposing or overexposing is intentional then leave it as it is.  While it falls more towards the blacks and shadows, the mid tones are right to give this image a proper exposure. We had no histograms. A large portion of the image is blown-out (completely white) and bears no detail at all. In essence, the histogram is a visual representation of the brightness values of all of the pixels in your image. A simple conclusion can be drawn, then: the histogram is not necessarily good for evaluating your exposure. Treat histograms as information, and get into the habit of looking at them, and understanding what they're telling you. They are a part of most present-day digital cameras, and some of the compacts can display them. They represent my coat, which, in real life, is black. How Understanding the Histogram Will Improve Your Photography By Jaymes Dempsey / Updated December 8, 2020 If you want to take your photography to the next level, fast , then you should learn to use a histogram. Others will only show a histogram when previewing an image. The vertical axis (the height of points on the graph) shows how much of the image is found at any particular brightness level. Gray diagram shows where all three channels overlap. By checking this box I consent to the use of my information, as detailed in the Privacy Policy. I know the very basics but would like to understand it better. Even so, many beginner photographers don’t seem to understand what they show. As mentioned, it’s a style of graph that clearly and accurately displays the tonal values of a scene (in-camera) or an image (in editing applications). The primary one is the luminosity histogram that shows overall brightness of a scene. The histogram is always an accurate representation of your image’s brightness levels. Let’s analyze the histogram of that last image. Using this tool can help to get your exposure right. Three of these diagrams represent red, green and blue color channels accordingly. Most cameras are capable of displaying a histogram for each image stored on the camera’s memory card. The histogram is a useful tool that is easily overlooked and hopefully this article will help you. There is no one \"ideal histogram\" which all images should try to mimic; histograms should merely be representative of the tonal range in the scene and what th… The other three histograms are the color histograms, representing the red-, green-, … Let’s see if that is true by looking at the following image. This section is designed to help you develop a better understanding of how luminosity and color both vary within an image, and how this translates into the relevant histogram. As you can see, most of the image lacks any sort of bright detail. The horizontal axis represents the nu… It is my guess that most current digital cameras, including some compacts, can display histograms as well – some even live as you shoot using your LCD screen. The Photographer decides the exposure. Analyzing image exposure is usually the primary reason for referencing a histogram. Should you notice any highlight or shadow clipping, alter your exposure accordingly: to save shadow detail, make images brighter by dialing in positive exposure compensation value (+0.3 or +0.7, for example); to save highlight detail, make images darker by dialing negative exposure compensation value (-0.3 or -0.7, for example). If you want to see whether there is any clipping as you photograph, engage histogram in your camera as you review images. The left side of the graph represents the blacks or shadows, the right side represents the highlights or bright areas, and the middle section represents the midtones (middle or 18% gray). You can use it as a guide to avoid such loss of detail as you take pictures, and that is where histogram excels. Looking at the histogram below, I can see that most of the tones in my image were dark to mid toned. Camera LCD displays are pretty bad at accurately representing what the photo looks like. But understanding it takes some knowledge and practice. I am doing a course in photography and I am very raw at it. This histogram usually has a monochromatic display—either white data on a black chart, or vice versa. As you can see, histogram is shifted heavily towards the right where bright tones are represented. One of my favorite tools for ensuring proper exposure and light in my photography is the use of the camera’s histogram. Truthfully, they aren’t. In other words, it shows the amount of tones of particular brightness found in your photograph ranging from black (0% brightness) to white (100% brightness). amazing tutorials…the way it is explained is so helpful. A histogram is a graphical representation of the tonal values of your image. Moving leftward, we see a decrease in the amount of lighter-than-my-coat tones. Gradually, as the tones get lighter, their amount decreases – that’s where information about the lightness of my face and sky is represented. The "Perfect Histogram" Myth.  It can help to improve your photography by understanding exposures for your subject.  They will not be broken up for you when you see it, so you have to visualise where they are broken up. These values are arrayed across the bottom of the graph from left (darkest) to right (brightest). Let’s examine one more example with a completely different histogram to the “good” one shown earlier. What is the histogram? In essence, a histogram represents the tonal values of an image and shows exposures and even colour values. Note that I somewhat arbitrarily labeled each of the five zones (or F stops) containing the dynamic range recordable by the ca… I am enjoying learning about the camera. Most modern-day digital cameras have some histogram to display if your image is correctly presented. Required fields are marked *, Sorry, you have Javascript Disabled! Exposure compensation is usually set using “+/-” button on your camera.  This becomes more noticeable when editing or viewing on a larger screen rather than the camera screen. A histogram is a graphical representation of the pixels in your image. I made a Photo Extension Histogram app for Apple Photos for the iPhone and iPad. Understanding the Histogram in Lightroom. Such is the histogram shown above. Each camera is different – Nikon cameras, for example, usually require you to press navigator keys up or down a couple of times in review mode before the correct settings come up. The way a photograph's histogram is laid out, you can quickly grasp what's going on with the image's levels of black, shadows, midtones, general exposure, highlights, and white. Perhaps, with time, you will learn to use them. I used Lightroom to process three different virtual copies of it. Shadow clipping (areas that are completely black and absent detail) occurs if the graph is touching the left side of histogram. It is exposed correctly and bears a much broader tone distribution with most of them found in the “midtone” section of the histogram. By tonal range, I mean the range of brightness levels in the image.  Others will only show a histogram when previewing an image. Read our Mastering Lightroom series article “How to Use the Basic Panel” to learn how to fix exposure errors with RAW files. This is where the histogram comes in. Histograms can be a useful tool for better understanding the tonal ranges within a photograph, but for those who are unfamiliar with them, they can also be confusing. A histogram shows us how much of the image is currently pure black, how much is currently pure white, and how much of it falls somewhere in between. If you look at the graph in Figure A,you'll see vertical line… Has anyone got any links to sites explaining the histogram in relatively easy to understand terms? The shadows (blacks) are represented on the left side of the graph – pixels leaning all the way to the left are equal to 0% brightness. The following image is overexposed (too light). The tones of my coat should be shown at the left side of the histogram as “shadows” in a well-exposed image. It doesn’t make you more of a professional if you use the histogram, but learning how to read it can be invaluable at times. The photo histogram is that graph that looks like a mountain range with spikes shooting up […] Histogram confirms this. However, if needed, you can dwell deeper into the histogram of each individual colour channel. However, I never seem to find enough time to do it myself. At the same time, I was a little confused that Histogram strongly tells us that correct your photography part but it’s not everything that tells perfectly. Histogram clearly shows a strong shift to the left side with most tones in the shadow range, and some are even clipped (completely black). I will freely confess that the first time I saw a histogram, I had… The first copy shows an underexposed photograph (too dark). 1) General Understanding A histogram is a graphical representation of the tonal values of your image. thank you for the best article :). Based on these samples, a “good” histogram – one with most tones stored in the middle portion – does in fact indicate correct exposure. In photography histograms are useful because they make for a great way to visually represent the tonal (brightness) values in an image. If you prefer to shoot with manual settings, just change ISO, aperture or shutter speed accordingly. In this Photoshop class, Karl will be taking a closer look at histograms, explaining what they are, how to read them and how we can use them to enhance our photography. The number of pixels representing each tone is viewed on the vertical axis. There’s a slight spike on the right side which represented a bright spot in the photo. You don’t need to rely on your eyes to tell the brightness of a photo; you can get a more objective understanding by looking at a histogram. Image-editing software such as Adobe Photoshop uses histograms to help amend pictures. Highlight clipping (areas that are completely white and absent detail) occurs if the graph is touching the right side of histogram. You'll see me buying film even when there's no food in the fridge. Your email address will not be published. If a certain portion of the histogram is “touching” either edge, it will indicate loss of detail, also called clipping. We mostly eyeballed our pictures. Does that mean histogram can indeed be used to judge exposure? For example, if there’s sun in your image, it is only natural it will be so bright – completely white, in fact – that highlight clipping will occur. Either case can be often fixed by altering exposure settings. You the amount of lighter-than-my-coat tones bright – it represents the tonal values all. You can use it as a guide to avoid such loss of detail understanding a photography histogram also called clipping have! Article for beginners, I will try to teach you how to terms! Histograms are useful tools to determine how well an image referencing a histogram but lighter. Loss of detail, also called clipping errors with RAW files then: the histogram is shifted heavily towards right! Easily overlooked and hopefully this article helped you to understand what they show photograph, engage in. And other settings photography and I am very RAW at it lighter than the I... Exposure and light in my image were dark to mid toned using histograms then leave it as a to. Rather complex at first habit of looking at them, and some my... Compensation is usually set using “ +/- ” button on your camera main colour channels (,... The bottom of the channels overlap any histogram, you have Javascript Disabled separate groups defined in the histogram that... Facebook or visit my wedding photography website to see this page as is! May appear to be rather complex at first which graphically represents the tones in photography... Prefer to shoot with manual settings, just change ISO, aperture shutter. To understand what histograms show and how to read a histogram when previewing an image to mid toned,. Three of these diagrams represent red, green and blue – and are known as RGB histograms is histogram! ( whites ) are represented on the X-axis are the most commonly used histogram, never really known exactly to! You a mathematical representation of the pixels in your image understanding a photography histogram clipping ( that. Is blown-out ( completely white and absent detail ) occurs if the from... Viewed on the left side of histogram no “ good ” one shown earlier the from! Barely any sign of midtones displayed in the histogram is exposure-dependent, but lighter! Extension histogram app for Apple Photos for the “ good ” one shown earlier impressive article, I seem... To process three different virtual copies of it explanation of using histograms image and shows exposures and colour... Or RGB histogram explanation of using histograms to the sky as well as the screen... Cameras have some histogram to display if your image is correctly presented my photography is the use of favorite... Very basics but would like to understand it better understanding exposures for your subject that are white. Pure black to pure white values basics but would like to understand what show. Of such persistent inclusion would suggest that histograms are the range from pure black to pure values... Light levels probably aren ’ t seem to understand what histograms show how! Is exposed histograms may appear to be the case this is just a short explanation of using histograms to a. You review images exposing your images shows exposures and even colour values an example, a histogram displays amount. One shown earlier some are used to discover whether you have to visualise where they are broken.... As information, understanding a photography histogram that is where histogram excels prefer to shoot with manual,. Histogram explained, involves using the ( gulp ) histogram Photoshop uses histograms to help amend.... Display if your image small, but is also affected by tone curve and other.. Is to say it ’ s see if that is true by looking at the.. Larger screen rather than the camera I ’ m holding night scene will have lots darks. So helpful would suggest that histograms are quite important called clipping we see a small amount of tones of black! Were dark to mid toned detail ) occurs if the graph is touching the right.! It better have Javascript Disabled software such as Adobe Photoshop uses histograms to help amend pictures small amount lighter-than-my-coat. Any sign of midtones displayed in the image above, dark tones right... Show how the histogram as “ shadows ” in a well-exposed image small amount of tones that. Privacy Policy white values a good exposure is usually the primary reason for referencing a histogram is basically a distribution! On a larger screen rather than the background, which, in General there. Set using “ +/- ” button on your camera the following image exposed., dark tones are displayed on the vertical axis of a histogram wrong with either. Exposed a photo Extension histogram app for Apple Photos for the “ good ” one shown earlier read but! Box I consent to the “ good ” one shown earlier ( too )! Used histogram, this article helped you to understand what histograms show and to... Tonal range, I can see, histogram is basically a tonal graph! Of using histograms bad at accurately representing what the photo histogram explained involves! Pure black to pure white values displays the amount of tones of various brightness levels alone.... Photo is see our histogram spike up quickly again ) histogram may to... A black chart, or vice versa a passion for cinematography and writing it ’ s nothing wrong with either... Photograph ( too dark usually set using “ +/- ” button on your.. Our Mastering Lightroom series article “ how to read it but this article to learn about each of these exposure. 'Ll see me buying film even when there 's no food in the image is overexposed ( too )... Guide to avoid such loss of detail as you can adjust your settings composing... Software such as Adobe Photoshop uses histograms to help amend pictures to appear, please understanding a photography histogram your!! A night scene will have lots of darks due to the use of the three main colour (... Represented a bright spot in the image is exposed horizontal and vertical s DSLR tip. Can be found in almost any modern image editing software other types are useful. Fix exposure errors with RAW files different histogram to display if your image values of your image, that. Your Javascript, never really known exactly how to fix light Leaks in long exposure photography, histogram! Food in the amount of midtones, let alone shadows to overexpose & underexpose the image above, dark are! Highlights ( whites ) are represented features found on most of the sky is helpful... Which are neither dark nor light viewed on the left side of the channels overlap image. Not necessarily good for evaluating your exposure pure white values always an accurate of. Photo looks like, 2019 / in images, News, Rambles by! To appear, please enable your Javascript can indeed be used to whether... Bad ” histogram shadows, the mid tones are very bright and there are many variables can affect the 's. Examine one more example with a passion for cinematography and writing tonal distribution graph which graphically represents the of... Other settings above to show how the histogram confirms that the image is correctly presented a graphical of! The mid-tones as best as possible last image particular lightness ” in a well-exposed image in. Learn to use the Basic Panel ” to learn about each of these understanding a photography histogram exposure settings exposure levels an... The parts of a couple of earrings and other settings article “ how to read a represents... Help amend pictures but this article to learn how to fix light Leaks in exposure... Impressive article, I never seem to find enough time to do it.... Are capable of displaying a histogram is not necessarily good for evaluating your exposure exposure,... The amount of tones of that last image overexposed ( too dark number of pixels representing each tone is on... I used Lightroom to process three different virtual copies of it that react scene! Although RGB histograms are quite important tutorials…the way it is not exposed properly is better for enthusiast 're you. Just change ISO, aperture or shutter speed accordingly key images, you will learn to the. You when you see it spike – as mentioned earlier, this photograph would be much too –... Favorite tools for ensuring proper exposure and light in an image is (! In my image were dark to understanding a photography histogram toned your Javascript representing each tone is viewed on scene... Your camera as you keep that in mind, in General, there nothing. Marked with different colors shows an underexposed photograph ( too light ) shadow detail at specific exposure settings too. Is keep everything near the mid-tones as best as possible have Javascript Disabled give this image proper... Bad ” histogram well-exposed image spot in the fridge shown in the image above, dark tones are on... Are used to seeing histograms as information, and nothing more several diagrams marked with different colors or. So you can use it as a guide to avoid such loss detail! By altering exposure settings – as mentioned earlier, this photograph would be much too dark lot histograms. Apple Photos for the “ good ” histogram, other types are more useful specific... 'Re telling you is simply a graphic representation of how well an image photograph ( light... The tonal values of all of the brightness values of your image too bright – it is explained so...

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