Composite "fuzzy"

[kfeina]

Hello;

I'm doing a composite between two images:

- The "first" image contains text in different colors.
- The second image is a background wallpaper.
- The composited image is not clear. The "red text is fuzzy, not clear". Other text colors like black, white, are perfect ....

Is it possible to have a clear result, maintaining the original text colors, without getting "fuzzy text" images?

Thanks a lot.

My command is:
"/BGBINARIES/ImageMagick/composite" -gravity SouthEast -geometry +0+50 "/tmp/BGINFO4X/k/bginfo4x.png" "/tmp/BGINFO4X/k/GNOME-Happygnome_1280x1024.jpg.original" "/tmp/BGINFO4X/k\BG_k_GNOME-Happygnome_1280x1024.jpg"

The text image is:


The resulting composited image is here:
http://i.imgur.com/cJnvmhi.jpg

[snibgo]

What version of IM are you using? On what platform? Please supply "GNOME-Happygnome_1280x1024.jpg.original".

Replicating your command on recent IM gives a different, cleaner result. (EDIT: when written to PNG.)

[kfeina]

Hello,

I'm using ImageMagick-6.8.3-10-Q16-x86-windows, portable edition.
After upgrading to the latest version ImageMagick-6.8.7-0 there is no improvement.

To see the original file: GNOME-Happygnome_1280x1024.jpg.original check here:
http://i.imgur.com/trpmfkF.jpg

Any help is welcome.

Thanks a lot.

[snibgo]

The resulting composited image is here: http://i.imgur.com/cJnvmhi.jpg

That image has black lines. Where did they come from?

The red noise around the red letters is caused by JPG compression. JPG is good for photos but lousy for graphics like this. Solution: don't use JPG. (The PNG equivalent isn't much larger.)

[kfeina]

Hello again,

The blank lines comes from another composite of 3 png files: shawdow.png + blank.png + red.png.
This file http://i.imgur.com/WRPMgcG.png is the result of this 3 composited files.

If the jpg has compression, why the blank lines aren't fuzzy ? The decrease of quality is not global for all the colors?

Thanks a lot for your time.

[snibgo]

Roughly speaking, jpeg compression works by removing insignificant detail, but also by adding spurious detail observable as "ringing" in areas of flat colour, which we can see inside and outside the corners of the black rectangle.

If you use lossless compression such as PNG, and blow up the blue areas around any lettering, you will see the PNG version is noticeably smoother than jpeg.

[kfeina]

Hello,

Yes, you are right, using .png improves the output.
PNG will be now the default file format for those wallpapers.

Thanks a lot for your time. Regards.