Sony W55 Quality, On “image quality” and “image size”, Basic techniques for better images, Selecting the image size for use (page 24)

Basic techniques for better images

Quality On “image quality” and “image size”

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

3072

640

Pixels

480 2304

1Image size: 7M

3072 pixels × 2304 pixels = 7,077,888 pixels

2Image size: VGA

640 pixels × 480 pixels = 307,200 pixels

Selecting the image size for use (page 24)

Pixel

Many pixels (Fine image quality and large file size)

Few pixels (Rough image quality but small file size)

Example: Printing in up to A3 size

Example: An attached image to be sent by e- mail

Selecting the image quality (compression ratio) in combination (page 38)

You can select the compression ratio when digital images are saved. When you select a high compression ratio, the image lacks the fineness of detail, but has a smaller file size.

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