A high-dynamic-range integrating pixel with an adaptive logarithmic response

作者：Cheng Hsiu Yu^*; Choubey Bhaskar; Collins Steve

来源：IEEE Photonics Technology Letters, 2007, 19(13-16): 1169-1171.

DOI：10.1109/LPT.2007.901466

• adaptive logarithmic pixel
• complementary metal-oxide-semiconductor (CMOS) image sensor
• logarithmic pixel

A majority of charge-coupled device and complementary metal-oxide-semiconductor imaging sensors obtain a linear response by integrating the photocurrent in the pixel. This is a simple transduction method; however, the dynamic range of the resulting pixels is smaller than that of many scenes. A biologically inspired approach to solving this problem is to create a pixel with a logarithmic response. A new design for an integrating pixel with a logarithmic response is presented in this letter. The theory of operation of the pixel is described before results are reported that show that the pixel has an adaptive response and a dynamic range of more than 120 dB.

• 出版日期2007-8