Legacy ImageMagick Discussions Archive

Hi, magick.

It worked well. Thanks for that; I can't see the rest of the site from where I am. A friend emails me:

"Auto convert images in the grayscale colorspace to sRGB"

from the changelog. Is this standard now?


s.

I'm using ImageMagick-6.7.7-8-Q16-windows-static

The -colorspace Gray and -modulate 100,0 are both returning images that are much too dark.


s.

Isn't "smart sharpen" the same as edge sharpening? If so try this. INPUT.JPG ^ ( +clone -unsharp 0x2 ) ^ ( -clone 0 -separate -evaluate-sequence Mean -blur 0x2 -negate -edge 2 -level 0,50%% -blur 0x2 -level 0,50%% ) ^ -composite ^ OUTPUT.JPG The -separate -evaluate-sequence Mean gives you ...

Alternative to -modulate saturation:

convert INPUT.JPG ( +clone -colorspace Gray ) +swap -compose Blend -set option:compose:args 250 -composite OUTPUT.JPG

250 is a very heavy increase in saturation.


s.

The whole point of the code was to retain the original canvas size for padding - white, in my example. The interesting part of a non-square image can be cut out, and the position of that image on the canvas can be varied independently. He also wanted to run the routine on a fairly large number of im...

The -gamma -1 blanks an canvas to white, -gamma 0 blanks a canvas to black. Why not run my code on an image to see if works. It does.

If the misuse of gamma is a worry to you then replace -gamma 0 with -fill BLACK -colorize 100% and -gamma -1 with -fill WHITE -colorize 100%


s.

Nope. I might have misunderstood his intention, it's not entirely clear - to me - from the initial post, but this is where I meant my response to go.

s.

I'm not sure this is what you're after but.... convert INPUT.JPG -write mpr:0 / -gamma -1 / ( mpr:0 -gamma 0 ( +clone -gamma -1 -rotate 90 ) -compose Over -composite -bordercolor BLACK -border 1 -trim +repage mpr:0 -compose Src -gravity East -composite ) / -compose Copy -gravity Center -composite / ...

It's worth noting that the parentheses require spaces on both sides of each character. Eg SPACE(SPACE... SPACE)SPACE. You could also try escaping the parentheses: \(... \). On Windows that would be ^(... ^).

s.

Try this.

convert BOTTOM_IMAGE ( TOP_IMAGE -alpha Set -channel A -evaluate Multiply 0.25 +channel ) -compose Screen -composite OUT.JPG

s.

Yup. I saw that the output file size was as expected; but it's difficult - for me - to check the integrity of the internal structure. Thanks again.

s.

Thanks for the fix, and the update glennrp.

s.

Using: ImageMagick-6.7.5-0-Q16-windows-static.exe Hi, all. I'm using this command: -define png:compression-level=0 and getting this error message: convert.exe: ignoring invalid defined png:compression-level =0 @ warning/png.c/WritePNGImage/11175. In the error message, the space in front of the equal...

Odd linear dropouts are appearing randomly in the upper half (as far as I can tell) of processed images. There isn't any particular command that seems to set them off and the same image processed again often doesn't show any sign of the problem. Here's an example: http://img811.imageshack.us/img811/...

Yes, I see. Thanks for the full explantion. Glad not a bug at your end or mine! Thanks again.


S.