| 摘要 |
Thresholding gray-scale images to produce bitonal images. In one example embodiment, a method for thresholding a gray-scale image to produce a bitonal image includes several acts. First, a first portion of gray-scale pixels of the gray-scale image are thresholded based on a global threshold and edge strength information. Next, a second portion of the gray-scale pixels are thresholded based on the global threshold and local pixel information. Finally, a third portion of the gray-scale pixels are thresholded based on a local threshold.
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