How do I highlight very faint lines from an image?

1 次查看（过去 30 天）

Jason Johnson 2020-9-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/587093-how-do-i-highlight-very-faint-lines-from-an-image

评论： Jason Johnson 2020-9-3

I am trying to check snapshots from a live video source for the existence of lines. I was hoping to do this with the edge() function, however, the real lines are too faint and instead the granularity of the image is highlighted. Is there a way to alter the image to make the lines stand out more? Altering the actual imaging setup is not an option.

I have attached an example photo. Some of the faint lines that I would like to highlight can be seen in the lower right part of the image.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Peter O 2020-9-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/587093-how-do-i-highlight-very-faint-lines-from-an-image#answer_487691

Have you tried the Hough transform?

https://www.mathworks.com/help/images/ref/houghlines.html

5 个评论
显示 3更早的评论隐藏 3更早的评论

Peter O 2020-9-3

I don't have much experience with desgining image filters, but a few other contributors do. Does Image Analyst's suggestion in the post below help? It looks like you might be able to pick out the peaks in the spectral plot:

https://www.mathworks.com/matlabcentral/answers/494415-bandpass-filter-applied-to-an-image

If it the spectrum is obscured in the full image, perhaps try cropping the test image to the portions containing the lines to get the pixel frequency.

Jason Johnson 2020-9-3