This dynamic tone mapping is important as it makes the image look realistic on most modern displays. For example, an HDR photo that has a 100,000:1 dynamic range needs to undergo tone mapping so that the tonal values fall between 1 and 255. Tone mapping deals with reducing the tonal values within an image to make them suitable to be viewed on a digital screen. All about tonal valuesĭynamic tone mapping is used to make flat HDR images look punchy and full of detail. This is where tone mapping algorithms come in. Now you have a photo with a lot of detail but one that isn’t particularly contrast-y or true to life. When you merge these photos, what you end up with is much more detail both in the highlights and in the shadows. What you need to do is take one photo that has a balanced exposure and then take more photos that are underexposed and overexposed. But you can’t merge the same photo, as it would have no effect on the dynamic range. ![]() In order to capture more detail, you need to take multiple photos of the same scene and merge them. This means that even with the sharpest, highest-resolution photos, a scene can’t be depicted realistically in a single frame because the dynamic range just isn’t there. Modern cameras, even with their large fancy sensors, aren’t able to capture as much detail as the human eye can see in any given scene. Before we move on to the question What is tone mapping? let’s understand a little more about HDR photography.
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