do you try the code on color document image?

[alexliyang]

Thank you for your sharing these code.

I try this work on color document image, it can not get the good output, do you have any idea?

[BookPlus2020]

Good question. Our previous work aims for scenes: texts are printed in black. The shadow removal of color document images is a challenging task. To my understanding, for the texts under shadows, the color information of pixel's neighborhood can be considered and used to recover the texts. This might require more storage and computation.