Sony DSC-W30 - Manual (Page 15)

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The apparent color of the subject is affected by the lighting conditions.
Example: The color of an image affected by light sources
The color tones are adjusted automatically in the auto adjustment mode.
However, you can adjust color tones manually with [White Bal] (page 35).
A digital image is made up of a collection of small dots called pixels.
If it contains a large number of pixels, the picture becomes large, it takes up more memory,
and the image is displayed in fine detail. “Image size” is shown by the number of pixels.
Although you cannot see the differences on the screen of the camera, the fine detail and data
processing time differ when the image is printed or displayed on a computer screen.
Description of the pixels and the image size
Color On the effects of lighting
Weather/lighting Daylight Cloudy Fluorescent Incandescent
Characteristics of light White (standard) Bluish Blue-tinged Reddish
Quality On “image quality” and “image size”
1 Image size: 7M (DSC-W70)
3072 pixels × 2304 pixels = 7,077,888 pixels
2 Image size: 6M (DSC-W30/W40/W50)
2816 pixels × 2112 pixels = 5,947,392 pixels
3 Image size: VGA
640 pixels × 480 pixels = 307,200 pixels
2816
2112
480
640
2304
3072
Pixels