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Old Jul 31, 2002, 9:06 PM   #1
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Default Whats the difference between 1,024 x 768 and 640 x 480??

I am wondering if this is the size or foto quality, I am not sure what this means
please tell me
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Old Jul 31, 2002, 9:39 PM   #2
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1024 x 760 and 640 x 480 are resolution values. It normally represents the number of pixels per image. Multiplying the two numbers gives the resolution values that you see for given for digital camera images, in this case the first value is 1 mega-pixel. The second value is sub mega-pixel. I assume that you must be looking at specs for a computer attached camera or a computer monitor given the values you provided in your question. You can get a more detailed definition by browsing the glossary sections provided in some web-sites devoted to digital photography.

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Old Jul 31, 2002, 10:03 PM   #3
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ALWAYS shoot your pix at the highest resolution available. You can always later reduce the resolution for e-mailing pictures.

You wasted your money on a high megapixel camera if you shoot at lees than maximum resolution.
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Old Aug 1, 2002, 2:13 AM   #4
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You'll find a lot of answers to digicam terminology in our Digicam Dictionary:


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Old Aug 1, 2002, 10:40 AM   #5
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it's both.

the first value (640) is the total number of pixals in width. the second number (480) is the height in pixals. as you increase the number 1024x728 1600x1200 and up you increase the resolution and quality of the image. this is the same as your monitor at home.
i run my monitor at 1280x960 pixals. no blocky pixalated letters. smooth images

most cameras have a second value called quality. this controls the compression of the image to the card. all cameras use a format called jpeg (.jpg) this format can be compressed at varying qualities. if you increase compression your image quality suffers but you have more space available in the mem card.

if your camera has an ultra fine and or raw setting compression is not available.
ultrafine generally uses another hi res format called tiff (.tif). this format does not compress well at all. on a 5 mega pixal camera 1 tiff image is about 14MB so on a 256 MB card we get between 17-18 images of outstanding quality.
raw (not available on all cameras) this is pixal for pixal what the camera saw without any processing. size is generally 9-11 MB.requires external software to process into a useable image. the software is either a standalone or a extension of photoshop or both. it comes with the camera generally

[Edited on 8-4-2002 by sjms]
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