Multilevel Thresholding for Image Segmentation Using Mean Gradient

Figure 7

Document binarization with the proposed preprocessing and global thresholding method. (a) Original image. (b) Contrast adjustment. (c) Background mask. (d) Foreground mask. (e) Background compensation mask. (f) Foreground compensation mask. (g) Compensated foreground. (h) Binarized image.

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