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Thread: Raw Covert to JPG IQ drop

  1. #1

    Default Raw Covert to JPG IQ drop

    HI al bros,

    I'm a Canon user. I always use raw to take all the picture in my 50D so when wanna convert to JPG. I see IQ drop alot after I convert to JPG. I use DPP to convert from raw file to JPG.

    Anyone encounter this? Or i miss up some step?

  2. #2

    Default Re: Raw Covert to JPG IQ drop

    Erm. I think the step you are missing is an understanding of the basics of digital file formats. JPEG is a compressed format, by it's very definition you would lose sharpnessand details. Compression generally works by discarding data deemed unnecessary. This is why one last sharpening pass is the usual methodology when touching up JPEG images.
    Alpha

  3. #3
    Senior Member madmartian's Avatar
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    Default Re: Raw Covert to JPG IQ drop

    Welcome to CS
    Take the shot!

  4. #4

    Default Re: Raw Covert to JPG IQ drop

    In Convert and Save or Batch Processing, you can set the JPEG compression quality. 10 is practically lossless (unity quantization), even 8 is visually close to lossless.
    Last edited by grantyale; 16th March 2010 at 05:25 PM.

  5. #5

    Default Re: Raw Covert to JPG IQ drop

    From raw to jpeg, the file size drop so much..
    Are you expecting no change in IQ ?

  6. #6

    Default Re: Raw Covert to JPG IQ drop

    Something somewhere along the way is off if the IQ drop is so noticeable ... unless you're peeping at 500% and above, by which time, anything would look bad.

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