By:

Jon Harman

AndroidDStretch

DStretch is a program for the PC and Mac that is used by rock art researchers to make faint rock art visible. This is a version for Android intended to be used in the field at a rock art site. Eight enhancements are provided together with settings that can adjust strength and saturation of the enhancements. Enhancements can be applied to a photo from the camera or from the gallery. The enhancements can be saved. For ease of use you can designate a default enhancement (I recommend CRGB) that is automatically applied when an image is loaded.The enhancements are: CRGB, YRD, YRE, RGB0: good for red pigments.YDT, YRD, YWE: general purpose. YDT, YBK, YYE: good for yellows.See DStretch.com for more information on DStretch and the enhancements.In addition to choosing the default enhancement, you can use the menu to set:Scale. This is the strength of the enhancement.Saturation. This controls the saturation of the enhancement. Set to 0 for grayscale, 1.0 for normal.MPixel Limit. Android phones can have memory problems with large images. Set this to a low value to avoid crashes, to a high value to get higher resolution for enhancements.Output Directory. This is where the saved enhancements will be put.Toggle Diagnostics. Turn on to get diagnostic information.

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