showkernel=1 not outputting

[afre]

In my discussion with snibgo on another forum, his example

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convert xc: -define showkernel=1 ^
  -morphology Convolve:0 Gaussian:0x2 null: 2>&1 | findstr Kernel

doesn't output anything; i.e., the part up to null:. If I do

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convert xc: -define showkernel=1 ^
  -morphology Convolve:0 Gaussian:0x2 info:

the output is

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xc: XC 1x1 1x1+0+0 16-bit sRGB 0.000u 0:00.093

So:
1. There should be some sort of output since showkernel=1.
2. The kernel given by info: should not be 1x1 in size.

I installed the latest IM and got the same result.

As an aside, I noticed that the installer places IM in the Windows system path instead of the user one. Is there a reason for that?

[snibgo]

Ha, fancy meeting you here!

For IM v7, you should use "magick" instead of "convert".

The command (with "convert") works fine for me with IM v6.9.5-3. But v7.0.3-5 with "magick" gives me no text at all. This looks like a bug.


The default Windows installation directory is something like "C:\Program Files\", which makes it usable by anyone. At installation, you should be able to choose any directory you want.

EDIT:

2. The kernel given by info: should not be 1x1 in size.

"info:" doesn't show the kernel, but the image. You specified the image to be "xc:" with no size specified, so the size defaulted to 1x1.

In ImageMagick, kernels are not images. The only direct way of getting data about a kernel is with "-define showkernel=1". This is different to G'MIC, where a kernel is an image (with only one channel), and the same operations can be made to kernels as to ordinary images.

[afre]

Thanks for confirming this bug. I installed the legacy convert since that is what I am used to. By path, I meant the ones under environment variables.

[magick]

Use -define morphology:showKernel=1.

[afre]

Thanks! I was looking at the IM v6 Examples where there are 3 ways to define this but Command-line Options does consistently have the morphology: prefix.

[fmw42]

It seems to be wrong here https://www.imagemagick.org/Usage/convo ... el_scaling and I have notified the author. It seems to be correct here https://www.imagemagick.org/script/comm ... php#define. Is there some other place that it shows wrong?

[afre]

Oops, I should have provided the links. This is where the 3 ways are shown https://www.imagemagick.org/Usage/morph ... showkernel and where every example uses -define showkernel=1 like on the convolve page.

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    -define morphology:showkernel=1    
    -define convolve:showkernel=1    
    -define showkernel=1