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ROCK ART FILTERS (56 images)

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Working with ImageJ software employing a plugin called DSretch both available online this imaging software filters rock art which were made using paint or hues and the filter makes some false colors but brings out images lost to the ravages of time. These photos come from BAJA Mexico from Northern Baja to the Mulege area near the Bahia de Concepion. Others come from the San Franciscan Range High Sierra north of San Ignacio. The Apache Rock art was photographed along the San Pedro River....
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