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JPEG/TIFF Image Size & Quality Samples


Standard Test Scene

The F717 has two JPEG compression levels which can be combined with a variety of image resolutions and JPEG FINE, JPEG STANDARD or TIFF image quality.

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:

  • 2560 x 1920 TIFF
  • 2560 x 1920 FINE JPEG
  • 2560 x 1920 STANDARD JPEG
  • 2048 x 1536 FINE JPEG
  • 1280 x 960 FINE JPEG
  • 640 x 480 FINE JPEG

Images below are cropped 240 x 100 area of the image magnified 200% (nearest neighbour).


 
2560 x 1920
TIFF
14,403 KB (Not available for download)
JPEG
FINE

2,196 KB
JPEG
STD

1,211 KB
 

 
2048 x 1536
JPEG
FINE

1,457 KB
 

 
1280 x 960
JPEG
FINE

584 KB
 

 
640 x 480
JPEG
FINE

144 KB

Interesting to note that the TIFF image appears to be very slightly softer, or 'less processed'. Other than that there's little reason to use TIFF (unless you like the idea of using 14 MB a shot), JPEG Fine provides all the detail with little in the way of artifacts (JPEG at least - sharpening halos are clearly visible). JPEG Standard seemed to work quite well, very few artifacts and a good saving in storage space.


Image Processing Adjustments

Another generation on and Sony still haven't caught up with the majority of other prosumer level digital cameras in respect to giving the photographer full control over the final 'look' of the image. There's still no ability to control colour saturation (often too strong for most) and no contrast (tone) parameter. Never mind some of the more advanced features available in similar specified (and more importantly priced) cameras like the DiMAGE 7Hi - selectable colour space, image filters, user memories or a RAW capture mode. Lets hope Sony R&D are listening and will give some control to the photographer in the next iteration of prosumer digital cameras.

Sharpening

The only parameter you do have control of is sharpening. The DSC-F717 provides five levels of sharpening from +2 (hard) to -2 (soft). The slight halo sharpening artifacts visible at the normal sharpening level (0) can be reduced by using a sharpness level of -1 (although obviously at the expense of detail sharpness).

Sharpness: +2 (Hard)
Sharpness: +1
Sharpness: 0 (Normal)
Sharpness: -1
Sharpness: -2 (Soft)
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