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Scanning & saving An Image at 300dpi

5 by 8 size?

   
1:01 pm on Oct 10, 2008 (gmt 0)

10+ Year Member



I have a picture of a scenery that I need to scan and save as -
Size: 5 By 8 inches
Resolution: 300 dpi

I am using Photoshop. What is the procedure / settings that I should choose for saving an image at a resolution of 300 dpi in size 5x8?

11:50 pm on Oct 10, 2008 (gmt 0)

WebmasterWorld Senior Member rocknbil is a WebmasterWorld Top Contributor of All Time 10+ Year Member



First your scanning software should be able to set line resolution to 300 DPI, 24 bit color. If your image is larger or smaller than 5 X 8, take the height and figure the percentage. For an 11 inch original, 8/11 = 72% +-. for a smaller one, say, 4" height, 8/4 = 200%.

If you've got one of those funky scanners that doesn't have percentages or other tools Critical to Quick Work and just displays pixel widths of the scan area, set the "crop tool" in the scan software to the edges of the original. Figure the percentage like so:

5" X 300ppi = 1500 pixels
8" X 300ppi = 2400 pixels
So you would increase resolution until the pixels read 1500 X 2400 for the scan area. This will give you a 5 X 8 at 300 dpi (DPI=dots per inch, PPI=pixels per inch, the two are synonymous.)

Once in Photoshop, select Image->Image Size. If the image shows a 72 DPI resolution, DE-SELECT the "Resample Image" box. Type in 300 in the resolution text field, and you should see the print size change to 5 X 8 when inches is selected.