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A "Better Mousetrap" When Shooting JPEGsWhen shooting JPEG images, the default tone curve of the 1Ds tends to give a subtle greenish tint to shadow areas. This isn't particularly noticeable unless you need to brighten up the shadows of an image, and then it can become a problem. To solve this, I made a pair of custom tone curves that will reduce or eliminate the green shadow tint. The first one mimics the "standard" 1Ds tone curve, but gets rid of the green tint in deep shadows. The second also eliminates the green bias, but it opens up the shadows for a less contrasty look. The Low Contrast curve will increase the usable dynamic range captured when shooting JPEGs, (you will get an extra 2/3 of a stop in the highlights, and about 2/3 of a stop extra in the shadows) but the image will require a little more post-processing to not look "flat", as shown in Local Vs Global Contrast. The difference between the Normal Contrast curve and the Low Contrast curve is roughly equivalent to a Levels adjustment in Photoshop with a gamma setting of 1.5. To install the tone curves, you will need to download them by clicking on the links below, then upload the curves into your camera with File Viewer Utility or Canon Remote Capture. The images below compare the differences between the curves. The differences are subtle; to make the differences easier to see, open them in Photoshop and take some color samples with the eyedropper tool, and compare the RGB color values. Click here to download the 1Ds "de-green" Normal Contrast tone curve Click here to download the 1Ds "de-green" Low Contrast tone curve
Related Articles:Local Vs Global Contrast |
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