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A registration mark showing a slight misalignment of the printing heads, resulting in subtle color hues visible around the edges of the black area (click image to zoom in). In printing, registration black is a black color that includes 100% of each of the process colors used.
Bear tracks in Superior National Forest Deer tracks. Tracking in hunting and ecology is the science and art of observing animal tracks and other signs, with the goal of gaining understanding of the landscape and the animal being tracked (the "quarry").
A watermark is an identifying image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), caused by thickness or density variations in the paper. [1]
The final chapter, "Who were the hunters and who the hunted", concludes that australopithecines found in the three caves were brought in by carnivores, [2] contrary to Raymond Dart's Osteodontokeratic culture hypothesis, which proposed that the bones were brought in by the australopithecines themselves.
Optical mark recognition (OMR) is the scanning of paper to detect the presence or absence of a mark in a predetermined position. [4] Optical mark recognition has evolved from several other technologies. In the early 19th century and 20th century patents were given for machines that would aid the blind. [2]
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Pęczarski's 1845 work Card-sharpers by candlelight, depicting a card whose back has been marked, possibly using wax to add lines which become slightly visible when reflecting light. Card marking is the process of altering playing cards in a method only apparent to marker or conspirator, such as by bending or adding visible marks to a card.
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