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Relationship between dpi and pixels, when using digital camera

Posted on 05/30/2006 5:41:19 AM PDT by rudy45

I have to give someone a digital image. The image is supposed to be 4" x 6" @ 300 dpi. Frankly, I'm unclear how to do so. My camera has several settings, but none of them correspond to 300 dpi. The settings are - 640 x 480 pixels - 1024 x 768 pixels - 1600 x 1200 pixels - 2272 x 1704 pixels

How do pixels relate to dpi?

Thanks.


TOPICS: Computers/Internet
KEYWORDS: computer; digitalcamera; help

1 posted on 05/30/2006 5:41:22 AM PDT by rudy45
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To: rudy45
The 640 x 480 pixels - 1024 x 768 pixels - 1600 x 1200 pixels - 2272 x 1704 pixels settings are the total number of pixels in the image. The dpi value is the number of pixels per inch. If you need an image to be 4" x 6" at 300 dpi, it needs a total of at least 1200 x 1800.
2 posted on 05/30/2006 5:56:58 AM PDT by steve-b (A desire not to butt into other people's business is eighty percent of all human wisdom)
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To: rudy45
"dpi" - dots per inch.

"number of pixels" - number of dots.

3 posted on 05/30/2006 10:07:10 AM PDT by ThePythonicCow (We are but Seekers of Truth, not the Source.)
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To: rudy45
The term "dots-per-inch" usually applies to output devices like video monitors or printers, not digital cameras.

A "dot" generally corresponds to a "pixel".

4 posted on 05/30/2006 10:54:46 AM PDT by HAL9000 (Get a Mac - The Ultimate FReeping Machine)
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To: rudy45

You can use an application like Photoshop to change the DPI and dimensions of your image.


5 posted on 05/30/2006 10:57:26 AM PDT by HAL9000 (Get a Mac - The Ultimate FReeping Machine)
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