Legacy ImageMagick Discussions Archive

How do you expand the mask so that the border around the objects is exactly one pixel? It's easy to expand the mask itself by one pixel, but it's not the same. I don't think I can even do it using trigonometry, as each object is a different size and doesn't have a regular shape. Expand the mask, an...

Now you need to expand that mask by the thickness of the border you want to add. You can blur it then adjust the transparency of the result to create a nice fuzzy / anti-aliased border. Just how fuzzy and thick it is depends on your blur and semi-transparency adjustments. How do you expand the mask...

What do you mean, "pointers"? I edited the first post so that the images shown are no longer thumbnails, but the images themselves. Hopefully that clears up any confusion. I am aware of how to remove the alpha channel and change the background color (though I included it in case there's a ...

I was wondering if there were any way in ImageMagick of getting the black border around the object in the second image below, starting with the first image. I can do it in The Gimp, but I'd hoped that there was a way of automating the process. Note that the first image is a 32-bit image with an alph...

Thanks!

Hi!

I was wondering how one might reduce the number of colors in an image by applying a custom indexed palette to the image. I have a custom palette in Photoshop .act format as well as Paint Shop Pro .pal format.

Thanks!

You mentioned having problems with -monochrome, not -ordered dither. That is correct. However, I am experimenting with both methods. What version of IM are you using? Whatever is the latest available for Windows. I just downloaded it about a week ago. PS: why are you overlaying you image onto blue?...

I managed to truncate the commands down to this much: convert "%1%2" ( -channel A -ordered-dither 2x1 ) ( -compose CopyOpacity -composite ) "%1_new%2" convert -size 64x128 xc:blue "%1_blue%2" convert ( "%1_blue%2" "%1_new%2" -compose SrcOver -composi...

rain wrote: If I embedded it in an svg would my users then need a plugin for svg?

Yes; but then it would work in all browsers.

If you would PM me when you get done rewriting that section, I would greatly appreciate it.

You can also embed the PNG image in an SVG document.

I'm having trouble getting the -random-threshold command to apply only to the alpha channel, as described in this tutorial . It always causes the other channels to become reduced to two colors, as well. Likewise for the example where the alpha channel is seperated before using the -monochrome comman...

Starting with a full RGBA PNG image, I then run the following batch file: convert -channel A -negate -separate -monochrome %1%2 %1_alpha%2 composite -compose CopyOpacity "%1_alpha%2" "%1%2" "%1_new%2" convert -size 64x128 xc:blue %1_blue%2 composite over %1_new%2 %1_blu...

The resulting image does require transparency; so I can't just flatten it.

How would I truncate the above batch file into a single command?
Also, how would I change the dithering method to ordered instead of Floyd-Steinberg?

First of all if the resulting image does not require any transparency, you can just flatten the image to a fixed color the same as the background page on which you plan to display the image. How do you mean? As for your example and artical. you do not need ths -dither argument at all as that is the...