Anthony Thyssen on wrote...
| "Simon Tam" on wrote...
| | I have a complex hi-def tv image (included). I'm trying hard to figure out
| | what ImageMagick processing I need in order to convert this image to a
| | grayscale/monochrome image but with the scoreboard text/graphics pop out a
| | lot more than the main image. It is likely that the scoreboard text and
| | graphics surrounding it are likely the highest intensity pixels on the
| | screen (but not always). Not sure if that helps.
| |
| | I tried the 2 color quantization method (convert image.png -colorspace
| | gray +dither -colors 2 -normalize) and that seemed ok but not the ideal.
| | Looking for other suggestions you might have. I'm trying to avoid having to
| | write a custom filter (not even sure exactly what I would do there but it
| | would be complex, like dropping pixels within a banded threshold and of
| | certain clustered densities, ex. portions of gray). The ideal result would
| | be that only the scoreboard text/graphics are the only thing left and in
| | monochrome but I don't think that can be achieved without some custom image
| | processing.
| |
| | Hope this file makes it through. Since it's a high def image (1920x270
| | cropped) it's still quite large.
| |
| | I appreciate any advice you can give me.
| |
| | Regards,
| | Simon
| |
|
| Hmm tricky, sounds like what you want is something that maps
| any primary color to that color, but anything else to black.
|
| One solution I can think if is take a copy of the image
| and make specific colors transparent, the use that to mask out
| all the other non-matching colors.
|
| See the second example of
| http://www.cit.gu.edu.au/~anthony/graphics/imagick6/color/#transparent
|
| For example
|
| convert hd-tv.png \( +clone -matte -fuzz %2 \
| -transparent blue \
| -transparent green \
| -transparent red \
| -fill black -colorize 100% \) \
| -composite primary_colors.png
|
| This would return an image only showing colors close to just the
| specific colors specified, and replace all other colors with black.
|
Final result is now in the IM forum.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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Like all bee keepers, Death wore a veil. It wasn't that he had anything
to sting, but sometimes a bee would get inside his skull and buzz
around, giving him a headache. --- Terry Pratchet - "Eric"
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Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/
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