Determining Exposure Times Using Split Paxels

摘要

A plurality of images of a scene may be captured. Each image of the plurality of images may be captured using a different total exposure time (TET). The images in the plurality of images may be downsampled. A pixel value histogram based on pixel values of the downsampled images may be constructed. The pixel value histogram may be compared to one or more reference pixel value histograms. A payload TET may be determined based on comparing the pixel value histogram to the one or more reference pixel value histograms.

主权项

1. A method comprising:
capturing, by an image sensor, a plurality of images of a scene, wherein each image of the plurality of images is captured using a different total exposure time (TET); downsampling the images in the plurality of images; constructing a pixel value histogram based on pixel values of the downsampled images; comparing the pixel value histogram to one or more reference pixel value histograms, wherein comparing the pixel value histogram to the one or more reference pixel value histograms comprises determining, for the pixel value histogram and each of the one or more reference pixel value histograms, respective similarity metrics, and determining respective weights based on the similarity metrics; determining a payload TET based on comparing the pixel value histogram to the one or more reference pixel value histograms; and capturing at least one additional image of the scene using the payload TET.