Fig. 1
From: In-pixel foreground and contrast enhancement circuits with customizable mapping
Contrast enhancement and pixel circuit. (a) A low-contrast image before applying the contrast enhancement function. (b) A contrast enhancement function, where points A and B are used to shape the transfer function. (c) Image after applying contrast enhancement. Image features are more visible than the low-contrast image. (d) Schematic of a basic 3-transistor (3-T) pixel circuit. Here, X1, X2, and X3 are reset, source-follower, and selector transistors, respectively. (e) Timing diagram of a 3-T pixel circuit. Here, the slope of VPD is higher in the case of higher illumination.
