Remove background to take text

[alone76816]

I have an image as below, name of image "res.png":


I use this command:
"convert res.png -blur 0x0.5 -contrast-stretch 50x0%% -unsharp 0x2 z.png"
result is:

I don't know to how i remove background to take text. Anybody help me, please !

I use an other way:
"convert res.png -edge 1 -negate -normalize -colorspace Gray -blur 0x.5 -contrast-stretch 0x50% y.png"
Then, i have an image:


I want an image with "white background" and "black text", help me, please, please, please !

[snibgo]

Most of your pixels should be white. "-contrast-stretch 50x0%%" makes half of them black.

"-contrast-stretch 2x90%%" works better.

[fmw42]

If on unix (Linus or Mac OSX or Windows with Cygwin) see my script textcleaner at the link below. If on pure Windows see the IM function -lat.

try something like

Code: Select all

convert image -lat 25x25+10% result

[alone76816]

Thank for "snibgo" and "fmw42", thank you very much !
I used fmw42' code:

Code: Select all

convert image -lat 25x25+10% result

then, this result:

I want remove black background, because my image must black text and white background, or white text and black background. I don't know how i do it.
And, how can i convert image from black to white and from white to black ?

[fmw42]

Take your input and use -negate so that the input to textcleaner is always black text on white background. Then use -negate to convert back if need be. Textcleaner only works with dark text on light background

convert image -negate image_neg

textcleaner ..... image_neg result

See
http://www.imagemagick.org/script/comma ... php#negate

[alone76816]

Thank you, I will more research !

[fmw42]

try this

Code: Select all

textcleaner -g -e normalize -f 25 -o 10 res.png res_tc_f25_o10.png

[alone76816]

Why can I run that command ?
when I run, I gave an error:
"textcleaner: command not found"

How can i run this scripts, fmw42 ?

[fmw42]

You must be on Linux, Mac OS X or Windows with Cygwin. You have to download the script from my web site and follow the Pointers for set it up properly.

[alone76816]

Thank you, fmw42.
I tried this command, and it's ok:

Code: Select all

./textcleaner -g -e normalize -f 25 -o 10 res.png res_tc_f25_o10.png