Legacy ImageMagick Discussions Archive

My correspondence with Anthony Thyssen on this topic (where bogus.png does not exist). I was working with IM v6.3.5.7 | If I do the following: | | if convert -regard-warnings "bogus.png" "tmp.png" | then | : ' do something else' | else | echo "--- cannot read input file ---&...

Thanks. That is terrific.

Fred Weinhaus

What about JPEG as well?

And is it a requirement that this be image format dependent and not just an internal IM notation in its meta data?

Thanks in any case no matter what you decide.

Fred Weinhaus

Hello, I have been doing image processing and scripting of image functions since 1978, but am relatively new to IM. I want to build more IM scripts (see my web page at http://www.fmwconcepts.com/imagemagick/index.html), but I find that although -fx can do a lot, it is still restrictive. I would like...

On your page http://www.imagemagick.org/script/fx.php, you state regarding the ternary operator: x ? y : z: ternary conditional expression, returns value y if x > 0, otherwise z; only one ternary conditional permitted per statement However this does not work. The statement reads that -fx will test t...

My apologies. I cannot reproduce it either. When this was occurring, I was using IM v6.3.5.0 So I went back and reloaded that version, but cannot find any image that I might have been using at the time that fails. What I found was an image that looks grayscale, but upon closer inspection there were ...

I have converted an image from RGB to HSL using: convert lena.jpg -colorspace HSL lena_hsl.jpg But the reverse operation does not seem to work and I think it should be fixed. convert lena_hsl.jpg -colorspace RGB lena_hsl_rgb.jpg I know there is a work around, but it is very awkward: convert lena.jpg...

Again you are missing the point. The suggestion is to make improvements to the ease of using IM and possibly to support more channels in an image such as Landsat. With regard to my suggestion: convert image_red.png image_green.png image_blue.png -unite RGB image_color.png I just found that you have ...

The issue is not whether png or jpg or any other format can support other colorspaces. The issue is that IM can or should be able to record this information internally when it creates an image in some other colorspace and that information should be available for other IM processes to access. Whether...

Hello, When I do the following on an RGB image: convert image.png -colorspace HSL image_hsl.png (or with suffix .jpg, etc) and then do convert image_hsl.png -verbose info: The colorspace is reported as RGB and not HSL. I was wondering if it would be feasible to have IM store the correct colorspace i...

Hello, I would like to suggest some possible enhancements to how channels are handled in IM. To access a (RGB or some other colorspace) channel one has to do: convert image.png -colorspace RGB -separate image_%d.png (where -colorspace RGB is optional if you know the image is already RGB) or each cha...

Hello Everyone, I was relatively new to IM back in 2007, but have had many years of image processing background. I have over the years, since then, developed some bash scripts to process images using IM in some new ways and would like to offer those to anyone interested. They are free for non-commer...

Hello, I have fixed my scripts with a cleaner implementation of my function that does not rely upon the keyword that is sensitive to changes in the IM version. (see my notes below) The new script is: function imagestats { data=`convert $1 -verbose info:` min=`echo "$data" | sed -n 's/^.*M...

Hello, I have fixed my scripts with a cleaner implementation of my function that does not rely upon the keyword that is sensitive to changes in the IM version. (see my notes below) The new script is: function imagestats { data=`convert $1 -verbose info:` min=`echo "$data" | sed -n 's/^.*M...

Hi, I don't know if this is a bug or an enhancement. I would very much like to separate an RGB image to HSB, process the B and/or S channels and then recombine them back to RGB looking like an enhanced version of the original. I have been able to do the first two steps successfully, but I can find n...