Simple intra-pixel interaction for smart CMOS image sensors

This paper is focused on our recent results on the used of local pixel interactions. We show results obtained on smart vision chips with the help of the mean value computation of small pixels block. Technical details on the implementation of this computation will be done. Then, we will focus on vision chips dedicated to the improvement of the input dynamic range (HDR sensor) using a bio-inspired law close to a light adaptive Gamma curve and a smart management of the pixel integration time. We show the use of these local mean values in order to minimize temporal redundancies in a flow of images. This technique reduces the power consumption for a constant frame rate (due to the reduced number of read and converted pixels) or improves the average frame rate of the imager. Finally, we will expose a very interesting alternative dedicated to a very efficiency compression coder dedicated to image wireless sensor network.