High-Dynamic-Range Image Reconstruction from Pixel-Level Self-Reset ADC Samples

HDR imaging is a technique that allows much larger range of luminosity to be expressed than the image sensor is able to capture. One way to acquire HDR images is to combine multiple low-dynamic-range images, taken with different exposure times, into one image that can express the larger dynamic range. For real-time imaging, digital pixels utilizing self-reset ADCs have made HDR imaging possible in hardware level. In this paper we propose a hardware circuit arrangement for constructing HDR images from low bit count samples captured from multiple frames.