Legacy ImageMagick Discussions Archive

Hello,

I was wondering if it's possible to get an image dimension and then save it into memory for later use, like the following:

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convert \( -size 400 -background transparent caption:”this is some text“ -write mpr:captionText +delete \) \( mpr:captionText -format "%[fx:h]" INFO: -write mpr:imgWidth +delete \)

When you don't supply the height for -size when using the caption command and just the width, the height is automatically determined for your image/text which is great and really glad it's capable of doing this, but what if I want to find out what the height from the caption command will be without having to write the image to disk but to memory instead so that I can use the height for something else?

Thanks in advance.

Your bash command has bad syntax. It must end with an output filename (which could be "info:"). Within the command, you can "+write info:" at any time.

To capture the single-line output from a bash command, use backtick, like this:

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$ size=`convert rose: -format %[fx:h] info:`
$ echo $size
46

This should work and is similar to snibgo's suggestion.

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height=`convert -pointsize 36 -size 400x caption:"This is some long text that should wrap to the next line" -format "%h" info:`

echo "$height"
126

Or perhaps you want to save it inline. If so, then

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convert -pointsize 36 -size 400x caption:"This is some long text that should wrap to the next line" -set option:hsize "%h" -format "%[hsize]" info:

126

Perhaps a better explanation of what you are trying to do later with the height would help us understand what you want.

Legacy ImageMagick Discussions Archive

Get and save image dimension in memory?

Get and save image dimension in memory?

Re: Get and save image dimension in memory?

Re: Get and save image dimension in memory?