 Leah Brown |
How to decrease graininess with enlarging photos I have Digital Image Pro 10 and I can't figure out what to do to keep my pictures from being so grainy when I enlarge them. The pics appear ok on my pc but when I have them printed off at a photo center, the details are very poor. I'm not sure if I need to resize the pics, canvas, or what? I think my problem has to do with pixels but I don't understand my digital program well enough to get good pics.
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Christopher A. Vedros |
Leah, How large are you trying to print your photos? If you are still using the Sony Mavica listed in your gallery, keep in mind that this is a 1.9MP camera, so you have limited resolution. Without any type of upscaling, an 8x10 from this camera would be printed at roughly 150dpi, where 300dpi is the generally-accepted minimum resolution for good photo printing. Pictures only need between 72 and 96 dpi (dots per inch) to look good on your screen, but they need about 300 dpi to look good when printed. Tell me if this is the case, that you're trying to print 8x10 or larger from that camera, and I'll tell you what steps you can take to try to improve your results. Chris A. Vedros
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Ariel Lepor |
Like Chris said, the screen only shows ~90 DPI while the prints need many more pixels to get the reasonable quality at 300 DPI at a large print. If you enlarge the photo, small detail problems and image noise (which you can see on the PC by zooming in) will be magnified. You can reduce noise with certain programs (I recommend Helicon Filter Free), and although this will get rid of much of the grain, the pictures won't necessarily be high quality (detailed) when looking at them up close.
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Alan N. Marcus |
Hi Leah, Your Sony Mavica can output images in one of three resolutions. When prints are required you should set your camera to the highest. At this setting the output will be 1200 x 1600 pixels. It is generally agreed that good print quality is achieved when a print is made with a resolution of 300 pixels per inch. (ppi). Some observers are satisfied with a print quality of 200 ppi. Let’s explore using these values, what size enlargement you can reasonably expect. And 8 inch x 10 print at 300 ppi works out to 2400 x 3000 (above your cameras ability) And 5 inch x 7 print at 300 ppi works out to 1500 x 2100 (close could be OK) And 4 inch x 6 print at 300 ppi works out to 1800 x 1800 (within cameras ability) Best of luck,
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