remove streaks from a image

Hi Guys !!!!!!!!!!

I have some images (grayscale) in which some text is written but with same color (which can easily get converted into black while binarizing the image) lines are drawn from one end to other . lines are continous and three or two pixel wide . some time line also intersect the text......

i have tried using imclose and strel, my lines diappear but my text also gets erased and everything becomes white.... i want to remove the line without affecting the text ...... Plz suggest methods !!!!!!

thanks a lot....

Answer 1

[Image Analyst]

rajashekar, where did you upload your image? Can you post it to tinypic.com? People almost always like to have images to look at when giving advice on image processing - weird, huh?

Morphological closing always enlarges an image, unless your background (the paper) is the foreground (white) and your writing is actually the background (black). In that case closing will make the dark lines smaller and broken. I suggest you reverse the sign in your thresholding to make the text true (1 or white) and the background false (0 or black). If you insist on doing it in reverse like you are now, then try imopen() instead of imclose().

[rajashekar]

i got this image

http://tinypic.com/r/kb6ner/5

but it should look like this(atleast closer)

http://tinypic.com/r/yl8ub/5

[rajashekar]

i also used

se=strel('square',15);

& imopen() but i got this image which has no vertical lines but has lot of gray stuff

http://tinypic.com/r/2yzm0y0/5

[Image Analyst]

Are you trying to restore a corrupted image? Which one is the input image? Or did you even post it? What does "I got this image" mean? Does that mean that is the input image that you were supplied with? Or does that mean that is what you got after you tried some operations on the input image? Try to envision the situation from my viewpoint - someone who has no prior background knowledge or context of your situation. Now try to explain as clearly as you can. Tell me what image you are starting with and what is the desired output image. Closing may or may not be the best approach.

[rajashekar]

i'm sorry...."i got this image" is the input image i.e http://tinypic.com/r/kb6ner/5 and i should get the output as http://tinypic.com/r/yl8ub/5 or closer to this......after several operations i tried i could get as far as this image http://tinypic.com/r/2yzm0y0/5.....

[Image Analyst]

That's not bad. Looks pretty good to me considering how badly corrupted your input image was. Maybe your expectations are unreasonably high for an image that is corrupted so severely.