On 05/12/2010 09:46 AM, uluru75 wrote: > I have a problem with setting print size of images. > When i set it to 148mm and 105mm, it's being set, then i save and close the > image. > However, when i re-open the jpg, it often show the sizes like 148.22mm or > 105.05. Basically i don't want anything after the dot, i want exact size. > Does anyone has any idea how to fix it? > Images are always saved in integer numbers of pixels.
To get exactly 148mm by 105 mm, a mm should be an exact number of pixels. The number of pixels you mention is not exactly commensurate with a 148 x 105 mm image, so the image (if it's really 148.22 x 105.05) will have to be scaled to be a little bit shorter. So in the Image->Scale Image tool, select image size in mm, but don't scale it yet. Then set the X-Y resolution to exactly number of pixels you want in a mm (10, say). This makes the specified print size come out exactly in pixels. Then, click on the chain link on the Image Size x-y pair, so the image can be scaled to exactly the dimensions you want. Notice that 72 pixels per inch is 2.8346567 pixels/mm. Now, enter 148 in the Width textbox and 105 in the Height textbox (the pixels/mm entry should not change). NOW, scale the image. On this user list, people have mentioned a few times that the best scaling quality seems to be Sinc (Lanczos3) interpolation, but YMMV. Actually, when I did this with a 3872x2592 pixel image, then saved and reopened the image, it reopened with the image size default set to inches, and then when I converted that image size to mm, it said 148.01 x 105.01. Then, when I clicked in the pixels/mm box, then the height box, the .01's went away by themselves. This suggests it was a rounding error, rather than a size problem. _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
