Raw Covert to JPG IQ drop


sihin

New Member
Jan 14, 2010
13
0
0
#1
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?:dunno:
 

Rashkae

Senior Member
Nov 28, 2005
19,105
12
0
#2
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.
 

grantyale

Senior Member
Oct 4, 2004
1,798
0
36
Bedok
#4
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:
Feb 6, 2006
2,247
0
36
#5
From raw to jpeg, the file size drop so much..
Are you expecting no change in IQ ? :dunno:
 

Dream Merchant

Moderator
Staff member
Jan 11, 2007
9,659
6
38
#6
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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