Resolution problems

[hson]

I'm having some problems with the resolution of some images when mounting them in InDesign.

What I try to do is convert a large image to a smaller one with size max 700x700 pixels and set to 72DPI.

The original image have the following properties:

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  Geometry: 7323x5315
...
  Resolution: 300x300
  Units: PixelsPerInch
...
    X Resolution: 3000000/10000
    Y Resolution: 3000000/10000

I run the following command to convert the original image

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convert GT6030.1.jpg -filter Lanczos -resize 700x700 -quality 85 -density 72x72 GT6030_out.jpg

When checking the output image with

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identify -verbose |grep Resolution 

I get some different output depending on ImageMagick version (all versions compiled with exact same options on the same machine and installed in separate directories).

6.2.9-8 and 6.3.0-7 :

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  Resolution: 300x300
    X Resolution: 3000000/10000
    Y Resolution: 3000000/10000
    Resolution Unit: 2

6.3.1-7 :

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  Resolution: 72x72

6.3.2-9, 6.3.3-10 and 6.3.4-10 :

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  Resolution: 72x72
  Exif:ResolutionUnit: 2
  Exif:XResolution: 72/1
  Exif:YResolution: 72/1

6.3.5-10 :

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  Resolution: 300x300
  Exif:ResolutionUnit: 2
  Exif:XResolution: 72/1
  Exif:YResolution: 72/1

6.3.6-10, 6.3.8-11, :

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  Resolution: 300x300
  Exif:ResolutionUnit: 2
  Exif:XResolution: 72/10000
  Exif:YResolution: 72/10000

6.3.9-10 and 6.4.0-11 :

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  Resolution: 300x300
    exif:ResolutionUnit: 2
    exif:XResolution: 72/10000
    exif:YResolution: 72/10000

6.4.2-10 :

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  Resolution: 0.0072x0.0072
    exif:ResolutionUnit: 2
    exif:XResolution: 72/10000
    exif:YResolution: 72/10000

6.4.3-10, 6.4.4-10 :

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  Resolution: 0.03x0.03
    exif:ResolutionUnit: 2
    exif:XResolution: 300/10000
    exif:YResolution: 300/10000

6.4.5-9 :

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  Resolution: 0.03x300
    exif:ResolutionUnit: 2
    exif:XResolution: 300/10000
    exif:YResolution: 300/1

6.4.6-9, 6.4.7-10, 6.4.8-10 and 6.4.9-8 :

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  Resolution: 0.0072x72
    exif:ResolutionUnit: 2
    exif:XResolution: 72/10000
    exif:YResolution: 72/1

Am I doing something wrong or is this irradic behavior usual?

[anthony]

The erratic behavior is in response to bugs problems and queries. Basically Cristy (Magick) attempts to improve or fix things according to bug reports, and as a result the output here changes.

If you don't want this then try to figure out what SHOULD be output, not just for you but for everyone and look/fix at the code.