Legacy ImageMagick Discussions Archive

If you mean that percent escapes in "define" does not expand percent escapes when used in IMv6, WHEN it is actually used... That is just a 'new feature' of IMv7 coming from the same cade that is used to set 'labels' on images as they are read in (a IMv6 feature expanded to more general use...

-define does not use the expressions, but saves them for later use. That was because define often had to 'save' the percent escapes until later when an image is read. Also -define does not attache to images but globally, where -set are attached to images. The quintessential case of this was -label w...

To distinguish between the leaves and other parts I would look at using morphology on the mask image. This is actually what morphology was designed originally to do.. find objects of particular characteristics. First I would look at closing any small 'holes' that might be in the leaves, then do some...

There is a cavat with using -extent, for image with transparency...
But as JPEG images have no transparency that should not be a problem for you.

See IM Exmaples
http://www.imagemagick.org/Usage/crop/#extent

Polyline goes wrong on thick strokes and round linejoins With a stroke of 2 this is fine. convert -size 80x60 xc:white -fill white -colorspace RGB \ -draw "stroke black stroke-width 2 stroke-linejoin round \ polyline 14,53 30,5 71,14 51,41" \ -colorspace sRGB draw_line2.png http://www.imag...

I just tried the bug example with IM v6.9.3.0 (The default IM for fedora 25) convert -size 180x80 xc: -font ArialBk -pointsize 72 \ -gravity center -fill skyblue -stroke black \ -draw 'stroke-dasharray 10 1 text 0,0 "Abc" ' show: The result was that the letters were draw without dash strok...

I would create a dark grey background and blur with a 'black' virtual pixel setting...

Or add a black border and blur (a little thicker).


There are lots of ways to skin a cat, and what method you use depends
on what you want that skin for, and how messy you like the results!

It is also because the blur blurs red areas into black, and green areas into black because they are seperate color channels! Try doing the blur in a different (also more linear) colorspace. Perhaps LAB or LUV colorspace. Though snibgo is right in that the non-linear colors of sRGB is probably the ma...

I am glad to see the additions to make percent escapes more global starting to get good use!

This is basically what is discussed in Trimming Noisy images... http://www.imagemagick.org/Usage/#trim_noise NOTE: the techniques goes on to with an improvement by 'expanding' the resulting trim bounds using some FX maths. That is why separate percent escapes for each number may be preferable. At th...

See IM Examples... Identify Output Alternatives
http://www.imagemagick.org/Usage/basics/#identify_alt

Added in IM v6.2.4

That is you can use a number of options
info: (as final image)
-write info:
-identify
-print

For radiusxsigma, if radius=0, then it is computed from the sigma by some formula that is between 2 and 3 time sigma. I am not sure the exact formula. I have never used just the radius and do not know how that works or if that is a mistake in the documentation. What I'm does is a little binary sear...

You can either merge the last two frames (times are added) using... -layers RemoveDups See http://www.imagemagick.org/Usage/anim_opt/#removedups This is also automatically done by -layers OptimizePlus Or just delete the second last from using -delete -2 WARNING: you don't set a default delay for you...

Yes I see... for pixels that are not overlapping you get the full color with a partial transparency, and not a darker color at partial transparency In other words the mathematical operator would only apply correctly to overlapping pixels where you have no transparency, just a 'blend' of color. Stupi...

Hmmm.... OKAY... it may be a result of 'colorspace'. Images now using non-linear sRGB, by mathematics being applied without regard to that.

Not certian how to 'fix' the example if that is the case... can't spend that much time on it.