Brother International 2480C Software Users Guide - Page 32

Scanning Resolution 2 You can choose a scanning resolution from the Resolution drop-down list. Higher resolutions take more memory and transfer time, but produce a finer scanned image. The following table shows the resolutions you can choose and the available colours. 2 Resolution 100 × 100 dpi 150 × 150 dpi 200 × 200 dpi 300 × 300 dpi 400 × 400 dpi 600 × 600 dpi 1200 × 1200 dpi 2400 × 2400 dpi 4800 × 4800 dpi 9600 × 9600 dpi 19200 × 19200 dpi Black & White/ Grey (Error Diffusion) Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 256 colour Yes Yes Yes Yes Yes Yes No No No No No True Grey/24bit colour Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Scan Type 2 „ Black & White Use for text or line art images. „ Grey (Error Diffusion) Use for photographic images or graphics. (Error Diffusion is a method for creating simulated grey images without using true grey dots. Black dots are put in a specific pattern to give a grey appearance.) „ True Grey Use for photographic images or graphics. This mode is more exact because it uses up to 256 shades of grey. „ 256 Colour Uses up to 256 colours to scan the image. „ 24 bit Colour Uses up to 16.8 million colours to scan the image. Although using 24 bit Colour creates an image with the most accurate colour reproduction, the image file size will be about three times larger than a file created using the 256 Colour option. It requires the most memory and has the longest transfer time. 26