JPEG Quality / Image Sizes
Standard Test Scene
The Coolpix 885 provides four different image quality choices : HI (uncompressed TIFF), FINE (JPEG 4:1), NORMAL (JPEG 8:1), BASIC (JPEG 16:1) in combination with three resolution choices: 2048 x 1536 (native CCD resolution), 1024 x 768 (XGA) or 640 x 480 (VGA).
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:
- 2048 x 1536 HI (TIFF)
- 2048 x 1536 FINE
- 2048 x 1536 NORMAL
- 2048 x 1536 BASIC
- 1024 x 768 FINE
- 640 x 480 FINE
Images below are cropped 240 x 100 area of the image magnified
200% (nearest neighbour).
|2048 x 1536|
TIFF 9,327 KB - not available for download
|1024 x 768|
|640 x 480|
Here again we note that a FINE JPEG (same 4:1 compression as the 995) weighs in at only 745 KB, compared to the 995 image at the same compression which was around 990 KB. Either Nikon have enhanced their JPEG compression algorithm (doubtful), are compressing more than reported or are carrying out some kind of noise reduction / smoothing on the image before it's compressed.
Generally speaking, if you intend to post-process the image, you would probably be looking at using a low level of sharpening. If you wish to shoot for direct printing or don't intend on doing any post-processing, then a normal or high level of sharpening should be used. The 885 also features Auto sharpening where the camera will decide based on the scene content which sharpening mode to use.
The higher the sharpening the more visible sharpening artifacts such
as white halo's around dark detail and the more other artifacts are amplified
by the sharpening algorithm.
The 885 provides the photographer good control over the internal image processing algorithms which are applied to the image before it is "finalized" and written away to the Compact Flash card. Image Adjustment controls what contrast curve the camera applies to the raw image. In Auto mode the camera will analyse the image and decide for itself (though most of the time it appears to choose 'Normal').
|Less Contrast||Lighten Image||Darken Image|
Probably the most interesting adjustment out of these is 'Less Contrast' which reminds me a lot of a linear image (no gamma applied), it also appears to have more dynamic range (or at least is clipping highlights less).
|I am an Elephant by Bibix|
from An A to Z of Subjects- Week 5, E
|Mossy forest panorama by Jill Hancock|
from Your point of view
|Ship Moon and Stars by LJJohnston|
from For creative newbies only..