Legacy ImageMagick Discussions Archive

Hi friends,

I want to remove the see through of opposite page on some scanned papers. I have tried the -sharpen, -noise, -threshold and -white-threshold commands to reduce the see through but that affects the readability of the page too.

Please help me find the correct command and option to remove the see through with out affecting the page's readability.

Thanks in advance for your help.

Regards,
Pooja.

can you post an example?

see -lat (local area threshold) or my unix/bash textcleaner script at the link below, which used -lat.

Hi,

Thankyou so much for your help. I'm looking into your script. Can you please tell me how can I attach a sample picture on my machine to the post?

Regards,
Pooja.

poojakrishna wrote:Hi,

Thankyou so much for your help. I'm looking into your script. Can you please tell me how can I attach a sample picture on my machine to the post?

Regards,
Pooja.

You need to upload your image to some free image hosting service. There are many around. Search Google. Then put the link from where your image is hosted in your post here.

Hi,

Thank you for your help. Sample image is: .

Regards,
Pooja.

Hi,

Link to the image is: http://www.freeimagehosting.net/21339.

Regards,
Pooja.

Here is the result from one test of my textcleaner script. You can vary the parameters and see if you can make it better.


textcleaner -f 15 -o 10 21339.jpg 21339_f15_o10.png

Here is the result using just -lat with the same arguments

convert 21339.jpg -colorspace gray -negate -lat 15x15+10% -negate 21339_lat15x15_10.png

Hi,

Thank you so much for sharing the IM command. I will test the same command with different parameter settings as you said and will post the parametres if I can create a better result.

Your script's out put looks better than the -lat command's output. I'm using a windows OS. I will try the commands given in your TEXTCLEANER page with diffeerent paramerts.

Regards,
Pooja.

poojakrishna wrote:Hi,

Thank you so much for sharing the IM command. I will test the same command with different parameter settings as you said and will post the parametres if I can create a better result.

Your script's out put looks better than the -lat command's output. I'm using a windows OS. I will try the commands given in your TEXTCLEANER page with diffeerent paramerts.

Regards,
Pooja.

My script is a unix/bash script and will not run on plain windows. It would require you compiling windows with cygwin to get a unix-like environment. But you can run the IM command -lat and play with that just fine in windows. Note that % needs to be escaped as %% in windows.

see
http://www.imagemagick.org/Usage/windows/

Thank you!!!

Hi,

Thank you so much for your help and for providing link to your scripts. -white-threshold with value between 80% to 90% worked for me to remove the see through.

convert input.jpg -white-threshold 80% output.jpg.

Regards,
Pooja.