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Is there anyway you can increase the size of a photo without disturbing its quality?


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2009-02-06 20:04:16
2009-02-06 20:04:16

Answer: In digital photography, the cameras have certain resolution sizes for the pictures you take. I always choose the largest for that very same reason. Lower sizes will be disrupted of its quality when enlarged specially if you want to put them on paper and enlarged. So the best way to enlarge a photo is to shoot the photograph in its higher resolution and size. Answer:Not really, but if you want a big print from a small photo some programs have an effect that will add extra pixels so you can print it larger, I think it was a "Gaussian Blur" or something like that. Haven't used this in a while so I'll flag my answer from improvement. Gaussian Blur is used to soften an image and remove "fuzzies" that may occur when scanning photos with varying finishes. It is used to "soften the edges" between contrasting subjects of an image, such as a blue ball on a tan blanket. It does tend to make images "look" better, but that is ruled by perspective. - LessZoa

Photo manipulation programs (such as GIMP or Photoshop) can make images larger, however you will lose quality no matter what you do. Everything depends upon the original image being enlarged. A digital camera's image is saved by using JPEG compression, already losing valuable image data. Setting your camera to the highest possible resolution does help - but photographers and image manipulators should realize the compression is already lowering quality. If feasible, saving images as RAW or LAB (some high end cameras do this) will save as much image data as possible.

As the image is "blown up", the original pixels are separated, leaving gaps. The program then adds new pixels in those gaps, gradiating them between the original colors (similar to a blur). This is why when you "blow up" a picture it starts to look fuzzy, even pixelated. Image quality can be then improved by using various filters of the program such as Sharpen or Enhance and sometimes Gaussien Blur (along with adjustments to Contrast and Brightness); however, there is no fixed science to this. Some image specialists feel comfortable enlarging 10 to 15 percent, others will go as high as 25%. Then again more will flat out refuse to enlarge any image under 150dpi. Image quality always degrades upon each save. Always remember to keep your original image, and check the specifications required for your output.

When enlarging an image, several factors must be thought of... * Final output resolution (dpi:100% size) * ** Internet viewing is 72dpi, some use 75dpi

** Newspaper print is comfortable with 85dpi ** Magazine images should be no less than 150dpi (and even these can look bad) ** Posters (up to 36"x36") can put out decent quality at 300dpi * Try to keep your dpi to 100% of your output size * If final output is for large format (ie. billboards, outside advertising, etc.) ensure your RIP software can manipulate your image. * ** Images should be saved as EPS for large formats as RIP units are made to process these

* Remember, the closer the image is being viewed (in print) the higher resolutions reproduce better. * Consider the type of printing you are outputting to: * ** Offset, 4-color printing requires better defined images ** Sheet-fed printing up to 2 colors can deal with lower-quality images ** Web printing (not internet) with 6-color presses can deal with lower-quality images as there is more "dot" that bleeds into the paper - however they tend to blur a bit more


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