Auto Adjust (iTunes Link) is a lightweight utility for performing "Contrast Stretching" (normalization) on the all too frequent dim or white, washed-out image.
Typical Contrast Stretching (Auto Levels or Auto Contrast in Photoshop) interatively analyze an image to find the brightest and dimmest pixels (in greyscale). However, an otherwise dark image with one bright spot will span the entire range from 0 to 255 and no adjustments will be made. This limitation is overcome by processing the full histogram of the image and doing some discrete calculus.
Images are processed and saved at their original resolutions. This can lead to some longer processing times on larger images but it's worth the wait!
FAQs
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Auto Adjust requires iOS 6 but as of June 2013 does not support iOS 7. You should not be using an unreleased version of iOS on your primary device, especially if you are not a developer.
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If you need to reinstall Auto Adjust, please make sure to launch it at least once with an internet connection to restore your In App Purchase. You will not be charged twice.
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The Pro In App Purchase is NOT consumable. You only have to purchase it once to gain access to the pro features across all of your devices.
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All features available in Auto Adjust 3 are available in Auto Adjust 4 without purchasing.
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You may try all pro features as many times as you like, however, you will not be able to save or share your photo until you disable them or purchase.
for more, contact support@joemacirowski.com
