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kitweb
Currently Being Moderated

pixel resolution question

Dec 8, 2012 2:01 AM

Tags: #size #resolution #ppi

I have an image that is 15000 x 10000 pixels, 529cm x 374cm. It has been created at 72 pixels/inch.

 

I want to print it out at 100cm x 70cm at 300pixels/inch.

 

I am a little confused, can the larger 72ppi document be 'shrunk' to accomodate for the 300ppi print requirement?

 

Thanks.

 
Replies
  • Currently Being Moderated
    Dec 8, 2012 4:37 AM   in reply to kitweb

    You are reducing physical size to less than a fifth and increasing resolution by a little over 4 times. So yes, the image will shrink to the new size. Use command Image > Image Size.

     
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  • JJMack
    5,977 posts
    Jan 9, 2006
    Currently Being Moderated
    Dec 8, 2012 6:38 AM   in reply to kitweb

    kitweb wrote:

     

    I have an image that is 15000 x 10000 pixels, 529cm x 374cm. It has been created at 72 pixels/inch.

    I want to print it out at 100cm x 70cm at 300pixels/inch.

    I am a little confused, can the larger 72ppi document be 'shrunk' to accomodate for the 300ppi print requirement?

     

    Thanks.

    You saying you wan to do two things here.  You have an image document  has 15000 x 10000 pixels which is a  3:2 aspect ratio

     

    Your writing

    1.) You want a 10:7  aspect ratio print  so you need to resize you image to that aspect ratio by cropping it or distorting it with something like content aware resize.

    2.) You want the print size to 100cm x 70cm  at a resolution of 300 pixels per inch 100cm = 39.37" x 70cm = 27.55" x 300dpi = 11811px x 8265px You do the with Image Size once yoh have your image the correct aspect ratio.

     

    You can do both at once with the crop tool if you choose cropping as the way to change you image aspect ratio.  Corpping changes the images composition some.

     
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  • Currently Being Moderated
    Dec 8, 2012 8:24 AM   in reply to JJMack

    I wonder whether the original doc really is 15000 px x 10000 px. Unless the image has non-square pixels, these figures may have been rounded down or there may be a typo somewhere in the OP's details.

     

    The original doc is stated to be 529 cm x 374 cm. The required doc is 100 cm x 70 cm. The aspect ratios match and therefore a crop would be unnecessary if the pixels are square, hence my suggestion to just use Image Size command to produce the 300 ppi image.

     
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