Legacy ImageMagick Discussions Archive

fmw42 wrote: ↑2017-03-09T11:08:59-07:00 Try this Unix syntax:

Code: Select all

convert 9a6c443dfa76445fa95158948cc4e9bd.png \
\( -clone 0 -colorspace HCL -channel g -separate +channel -threshold 40% \) \
-alpha off -compose copy_opacity -composite result.png

Please always provide your IM version and platform, since syntax may differ.

I´m testing
tks

I used part of your command And got 3 figures. (print1-0.bmp print1-1.bmp print1-2.bmp)
Figure print1-1.bmp is perfect for my purpose.

Now 90% of my problem is solved. thank you so much.

Let's go to the remaining 10%.
I have images with the gray background and the font with shades of gray.
Serpá that I can remove the bottom?
Remembering that I can make multiple prints with the same text. And different backgrounds
Do you have any tips or suggestions for such a problem?
Thanks

I do not understand your question. Please post examples and explain further.

i use the command And got 3 pictures : img-0.bmp | img-1.bmp |img-2.bmp.

Figure img-1.bmp is great for character recognition

If I use in a gray font the result is bad


Any suggestion to be able to extract the character when the font is gray?

Gray images have no saturation (since there is no color), so the same technique will not help. All you can do it threshold on intensity.

If on Unix system, you could try some of my auto-thresholding techniques. See my home page in the table of categories down the page.