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Thread: Image compression

  1. #1

    Default Image compression

    Hello all,

    i'm wondering if say I have a 10mpx camera and i choose to shoot at 8mpx, will it be less noisy?

    i had some hope at first but after thinking about it, now my understanding is that since the no. of pixels is built (squashed!) into the ccd sensor so taking a picture at 8mpx doesn't reduce noise -

    what the camera does is take a 10mpx picture, resize and save at 8mpx.

    is that correct?

    :-(

    thanks.

  2. #2

    Default Re: Image compression

    10 MP and 8 MP aren't that different. The filtering process in downsampling does reduce noise though (at the expense of resolution).

  3. #3
    Senior Member
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    Default Re: Image compression

    Quote Originally Posted by simplequirk View Post
    ...
    what the camera does is take a 10mpx picture, resize and save at 8mpx.

    is that correct?

    :-(

    thanks.
    Correct. So essentially, the image is still registering on your 10MP sensor wholesale, so the noise level is still pretty much the same. However, resizing does mean a smaller image, which gives the impression that there is less noise.

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