Minimum resolvable contrast measurement of low signal-to-noise ratio image recognition based on convolutional neural network
Yu Wang, Yanyang Liu, Peng Zhao, Xulei Qin, Ye Tao, Ye Li · AOPC 2021: Optical Sensing and Imaging Technology · 2021
A new objective measurement method of minimum resolvable contrast (MRC) based on convolutional neural network (CNN) is proposed in this paper, in view of the fact that the subjective measurement results are easily affected by the observer’s subjectivity. Due to the low signal-to-noise ratio (SNR) of the low-light-level (LLL) images, it is difficult for traditional recognition algorithms to achieve ideal results, but the CNN can automatically learn features from the sample data for image recognition. This method does not depend on subjective judgment. It uses neural network instead of human eyes to recognize low SNR LLL images with different spatial frequencies and contrasts. The experimental results show that CNN is accurate and reliable, MRC images can be effectively recognized by it. The objective measurement of MRC based on CNN has good stability.