Active hollow four quadrant orientation detector array for applications to pattern recognition

摘要

The active hollow FOur QUadrant Orientation Detector (active hollow FOQUOD) two dimensional 8 ' 8 array using amorphous silicon material deposited on a silicon substrate has been fabricated successfully. This array can extract the contrast edges and the edge orientations of the test patterns and the pixel yield is close to 100 percent. Since the measured patterns are consistent with the expected results, part of the traditional data processing steps using software may be replaced by this hardware sensor array, a simpler algorithm than ever had for pattern recognition can then be developed.