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DStretch is a rock art enhancement program used by researchers worldwide. iDStretch is a version for the iPad and iPhone that can be used in the field to reveal faint rock art. iDStretch provides enhancements for a variety of pigments found in rock art. It is fast, simple to use, and enhancements can be saved. iDStretch needs no connectivity to work so enhancements can be done in remote places away from cell service or WiFi.
You can load an image from the album or take a picture with the camera.
To do an enhancement you can either press one of the buttons on the screen or swipe left or right on an unzoomed image. If you want you can hide the buttons and use swipes or the *Enh* menu item to do enhancements.