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Image size manipulation

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Image size manipulation Frank1e 21 Nov 10:56
  Image size manipulation Greg Chapman 21 Nov 11:33
Frank1e
2010-11-21 10:56:17 UTC (about 14 years ago)
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Image size manipulation

i wonder if anyone can help me? i have searched the forum for a previously posted solution and i have not been able to find one so sorry in advance if this issue has already been addressed.

I am trying to create a post card for print and have an image prepared to copy on to an existing layer. The image is a photo with a resolution of 72.000 x 72.000 pixels and is 416mm x 624mm. The layer i am working on is print size (147mm x 105mm),

When i copy the photo layer on to my print layer the image is massive, but when i change the size using the scale tool the resolution becomes so small that the image is not suitable for print. I have also tried to reduce the size using 'set image print resolution', but in this tool the image doesn't even change size when i change the mm.

Does anyone have any idea how to reduce the picture size, without looking the resolution?

thanks very much!

Frankie

Greg Chapman
2010-11-21 11:33:19 UTC (about 14 years ago)

Image size manipulation

Hi Frankie,

On 21 Nov 10 10:56 Frank1e said:

The image is a photo with
a resolution of 72.000 x 72.000 pixels and is 416mm x 624mm. The layer i am working on is print size (147mm x 105mm),

You misunderstand the nature of the resolution figure.

There's nothing fixed about it. It's simply calculated - based on the size you want it display/print it at and the number of pixels in the image.

There will be no damage, or loss of *available* quality, in the image if you choose to re-size it to fit your layer. All that will happen is that the resolution will be recalculated to tell you how many pixels will fit in an inch at the new size.

The default of 72dpi resolution is a largely historic figure suitable for display on early colour monitors. Even then printers were typically capable of 300dpi so, at native resolution, an image that would fill a screen would only print at the size of a postage stamp.

Does anyone have any idea how to reduce the picture size, without looking the resolution?

Simply resize the image to the number of cm you want. Yes, the number of dots/pixels per inch (i.e. resolution) will change, but you don't lose any image data, you just stretch/compress it to fit the desired size.

Greg Chapman
http://www.gregtutor.plus.com
Helping new users of KompoZer and The GIMP