Analog Metal-Oxide-Semiconductor Integrated Circuit Implementation of Approach Detection with Simple-Shape Recognition Based on Visual Systems of Lower Animals

Analog LSI for motion detection of approaching object with simple-shape recognition based on lower animal vision

“…Figure 3 shows the photograph of the chip. Edge detection circuits (EDC) with photodiode (PD) [3] are inserted at the first stage. Digitization circuits (DG) [3] arranged to x-and y-axes generate I x and I y , respectively.…”

“…Edge detection circuits (EDC) with photodiode (PD) [3] are inserted at the first stage. Digitization circuits (DG) [3] arranged to x-and y-axes generate I x and I y , respectively. Velocity sensing circuits (VSC) [3] arranged to x-axis generate the signals of the image angular velocity (right and left).…”

“…Digitization circuits (DG) [3] arranged to x-and y-axes generate I x and I y , respectively. Velocity sensing circuits (VSC) [3] arranged to x-axis generate the signals of the image angular velocity (right and left). DCMD circuit which inputs I x and the signal of image angular velocity (right) outputs I right in eq.…”

“…The signal for detecting θ dir,y is I dir,y . The peak value I vel,p of I vel (=I right + I left ) is proportional to v [3].…”

“…θ dir,x can be detected by using peak value I dir,xp of I dir,x (=I left -I right ) [3]. θ dir,y can be detected by applying this function to y-axis.…”