Locally adaptive image sensing with the 64x64 cell MIPA4k mixed-mode image processor array

This paper presents an implementation of locally adaptive image sensing with the MIPA4k image processor array. The implemented adaptive sensor circuitry allows the extraction of image detail in the presence of large dynamic intra-scene lighting variations. The implemented circuit method is based on the use of nonlinear resistive network filtering during image integration for controlling the pixel integration times locally, through the extraction and examination of average local intensity. Measured examples of the adaptive sensing operation performed with the MIPA4k processor array are presented.