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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).


 
2272 x 1704
RAW
4,250 KB Canon RAW (.CRW) - not available for download
Super
Fine
JPEG

1,903 KB
Fine
JPEG

1,188 KB
Normal
JPEG

560 KB
 

 
1600 x 1200
Super
Fine
JPEG

1,037 KB
 

 
1024 x 768

Super
Fine
JPEG


455 KB
 

 
640 x 480

Super
Fine
JPEG


209 KB

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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