White paper on a white background not working

[dhavaljivani]

I use your code for detecting a page and show the rectangle on paper and its work perfectly while background is black but if the background is white and paper also white then not able to draw the rectangle on paper

[KePeng1019]

I use your code for detecting a page and show the rectangle on paper and its work perfectly while background is black but if the background is white and paper also white then not able to draw the rectangle on paper

if paper is white and background also white, it can not find edge so it will not work.

[dhavaljivani]

@KePeng1019 Can you please explain in detail? This is the open cv library issue?

[KePeng1019]

@KePeng1019 Can you please explain in detail? This is the open cv library issue?

because it find edge of the paper. if background color is same as paper, the lib can not find edge in the image it scan. so it can not work in such situation.

[dhavaljivani]

@KePeng1019 Thank you for the explanation

[KePeng1019]

@KePeng1019 Thank you for the explanation

you are welcome

[nitishkumar325]

any solution to detect edge in any background

[INReportInsitemy]

I have the same issue when the background is lighter (light brown) it could not detect the edges of the paper.

[muslimmuda15]

The issue is still not find any solution