Legacy ImageMagick Discussions Archive

Hi, I'm using ImageMagck to generate thumbnails from a big image on my classic asp site.

This is my resize command that works correctly:
imageMagick.Convert "1-thumb.jpg", "-resize=" & newWidth & "x" & newHeight, "1-thumb.jpg"

My goal is to create thumbnails with the same size so I control, with an IF procedure, if my image is larger than 253 px and then I crop it:
imageMagick.Convert "1-thumb.jpg", "-gravity Center", "-crop" , newWidth & "x" & newHeight & "+0+0", "+repage", "1-thumb.jpg"

If I put the command like the tutorial tell me the server return to me this error:
ImageMagickObject.MagickImage.1 error '80041771'
convert: 410: unrecognized option `-gravity Center' @ error/convert.c/ConvertImageCommand/1783:

If I modify the command like this:
imageMagick.Convert "1-thumb.jpg", "-gravity", " Center", "-crop" , newWidth & "x" & newHeight & "+0+0", "+repage", "1-thumb.jpg"
it works but the image will be cropped from the left side and not from the center.

Can you help me?

What version of IM are you using?

The version of IM is 7.0.4-6-Q16.

Is it possible that this function doesn't work because it is deprecated on website that use ASP?

I know nothing about ASP. With recent version of IM, as you have, I don't know why cropping from the center doesn't work.

Of course, you are overwriting the file, so when it has cropped once, re-running the code won't crop again.

I have 3 passages for an image:
1) I pick the original, large size, image and I rename it,
2) I resize the renamed image only on height (width proportional),
3) If the width is over 253 px I crop the resized image.

All the process works correctly, incluse crop but it start from the default side, left top, and not on center.

Please, can you tell me if my command lines are ok?

I don't use ASP, so can't advise on that.

The IM parts look okay, but what are the values of newWidth and newHeight? And what size is the input image?

newWidth = 253 px
newHeight = 357 px

The input image is over 1.000x1.000 px

I suggest you try it as a command, at your shell: