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Digital Print Resolution My camera's highest setting is an uncompressed TIFF file of 1344x1024. When I open it up in Photoshop the image is around 18"x14" at 72dpi. What is the best way (resolution setting) to convert it for an 8"x10" photo on an Alps MD-1300?
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Here is answer that I adapted from a recent Weekly Workshop: Once you have opened your image in the program, go to the Image menu and select Image Size. This will open up a dialog box that allows you to control how large the digital image is and how big it will be when displayed on the screen or printed out. Disable the option to 'resample' your image; you want to do this before you set the resolution to 150-300 ppi. The higher the resolution the better but you never need to go beyond 300 ppi. After you have the resolution set to something between 150 and 300 ppi, you can resample the image if necessary. Resampling actually changes the file size of the image. When you resample down, you lose data. When you resample up, extra data is added in by way of interpolation. The latter process produces especially displeasing results; interpolated images are often much fuzzier and more pixelated looking. At this point, we do not want to interpolate the image up or downsize the image; we just want to change the resolution only. To ensure that you have disabled the resample option:
Either way, watch the File Size figure (just above the Pixel Dimensions in Photoshop). If this figure changes when you enter a new resolution or when you change the pixel dimensions, you are resampling the image. When you set the resolution to 150-300 ppi, you should see the print size of your image go way down. If it is still larger than 8"x10", you can downsize the image. When downsizing, you do want to resample the image so uncheck the File Size box or check the Resample Image checkbox. Set your units of measurement to inches (instead of pixels, percent, etc.) and set the short dimension to the size you desire, i.e. 8 inches. As long as you have the Keep Proportions checkbox checked, this will usually result in the long dimension of your image automatically downsizing to something like 10 inches. The only exceptions would be if your image was more square or panoramic in format. Once you have the resolution set to 150-300 ppi and the print dimensions to 8"x10" or so, you are ready to confirm these changes. Hit the Okay button. Then go to the File Menu and Save As, and save the file in the Photoshop file format with a name of something like 'originalFileName_print.psd' - this will insure that you keep you original source file intact in case you ever want it at a later date.
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