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Cannot crop to an exact pixel dimensions

594 Views 9 Replies Latest reply: Jun 11, 2013 12:37 PM by Duke35 RSS
Duke35 Level 1 Level 1 (0 points)
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Jun 7, 2013 5:26 PM

I am having a hard time cropping to an exact pixel dimensions upon export.  For my work, I need to crop to exactly 2166X1600, with a tolerance of no more than one pixel off of those dimensions, i.e. 2166X1599. 

 

I set crop tool to 2166X1600 and crop all of my images.  On the export I constrain to largest dimension of 2166 in both horizontal and vertical directions. Results vary widely from right on 2166X1600 to several pixels off on the short side.  Sometimes more than 1600, and sometimes less.  Any thoughts as to why these constraints do not work exactly?  Some sets of images I have to redo as many as 25% of a gallery of 200-300 images.  Any thoughts?  Thanks!

Aperture 3, OS X Mountain Lion (10.8.2)
  • Frank Caggiano Level 7 Level 7 (22,760 points)
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    Jun 7, 2013 7:31 PM (in response to Duke35)

    If I crop to 2166x1600 and then export setting Size To: to Original Size the exported image is 2166x1600 as reported by Preview.

     

    Have you tried that?

  • Frank Caggiano Level 7 Level 7 (22,760 points)
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    Jun 7, 2013 8:14 PM (in response to Duke35)

    Interesting. When I do the same thing (crop to 2166x1600) and then export at orginal size the image is 2166x1600.

     

    What version of Aperture are you using? I tried this with the latest release.

  • léonie Level 8 Level 8 (46,375 points)
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    Jun 7, 2013 9:15 PM (in response to Frank Caggiano)

    It works here too, Frank; exporting with "jpeg - original size" gives the correct pixelsize in the Finder and reimporting to Aperture the same.

    Screen Shot 2013-06-08 at 06.05.01MESZ.PNG

    Only it takes a lot of patience to apply the custom crop in the first place with the exact dimensions 2166x1600. If not done while zoomed in, the custom crop may be off a pixel or two.

     

    When I use the crop tool, I set a custom crop to 2166X1600.  So my pre-export image should have an aspect ratio of (1.35375).

    " should have": Have youactually checked the pixelsize in Aperture's metadata overlay after cropping?

    MacBook Pro (17-inch Late 2011), OS X Mountain Lion (10.8.4), 2.4 GHz i7, 16GB, 500GB SSD,1TB HD
  • Frank Caggiano Level 7 Level 7 (22,760 points)
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    Jun 8, 2013 4:53 AM (in response to léonie)

    Only it takes a lot of patience to apply the custom crop in the first place with the exact dimensions 2166x1600.

    True. What I did was to crop the image as close as I could using the crop tool and then enter the exact values in the crop brick.

     

    regards

  • léonie Level 8 Level 8 (46,375 points)
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    Jun 8, 2013 5:03 AM (in response to Frank Caggiano)

    True. What I did was to crop the image as close as I could using the crop tool and then enter the exact values in the crop brick.

  • phosgraphis Level 2 Level 2 (285 points)
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    Jun 8, 2013 5:41 PM (in response to Duke35)

    I have to agree with the OP. One of my repetitive tasks is to output an image exactly 960x400. Regardless of the equivalent crop ratio I use (96x40,960x400,24x10,etc.) Aperture frequently (about 25% of the time) produces an image that is off by 1 or 2 pixels, e.g., the exported JPEG is 959x400. Adjusting the size or position of the crop usually fixes the problem, but it frequently takes multiple tries and on deadline that's unacceptable.

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