Canon PowerShot S45 Review
JPEG/RAW Image Size & Quality
The S45 provides four image size options in combination
with three JPEG quality settings. On top of this you have the a RAW format
(losslessly compressed) which contains the RAW data as it comes off the
CCD sensor (unprocesed).
Standard Test Scene |
To give an impression of what some of the combinations
of image size and quality produce the table below is a cross reference
of some of them:
- 2272 x 1704 RAW
- 2272 x 1704 Super-Fine
- 2272 x 1704 Fine
- 2272 x 1704 Normal
- 1600 x 1200 Super-Fine
- 1024 x 768 Super-Fine
- 640 x 480 Super-Fine
Images below are cropped 240 x 100 area of the image magnified
200% (nearest neighbour).
As has been our previous experience Canon's choice of providing
a 'Super-Fine' JPEG option delivers near-TIFF-like image quality with
virtually no JPEG artifacts and no loss of detail. Higher compression
levels (Fine, Normal) do begin to introduce some slight JPEG artifacts
but nothing you would see at 100% zoom. Obviously the ability to shoot
RAW (and now to selectively switch to RAW format during record review)
is a big plus for the S45 and gives you far more post-processing flexibility.
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Dec 3, 2002
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Oct 18, 2002
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Nov 12, 2005
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