JPEG (Grayscale) (*.jpg)

Export as a grayscale jpeg raster (*.jpg).

JPEG is a lossy compression system which can achieve very high compression factors without picture quality suffering too much - discarding information that the human eye cannot see. Works well on photographs, works less well on line drawings, where the compression algorithm tends to blur sharp edges and thin lines.

When exporting to JPEG (Grayscale) (*.jpg) the following Raster Exporter Configuration dialog is displayed: 

Configuration

Pixel Size

This option allows you to specify the image resolution.

Image Width/Height

This option allows you to specify the output file size in pixels for width and height and the pixel size is in map units.

Compression Quality

Select in the range 100 - 10. 100=good (lossless), 10=bad.

Create Worldfile

True or False, to create worldfile containing georeferencing information.

Dithering Algorithm

Select from Dither (GDI), Floyd-Steinberg, Snap (GDI), Snap (Palette).

Progressive scanning

Progressive scanning allows gradual improvement of quality as an image is being viewed on the fly during transmission. True or False.

Arguments to Export API Method

• clsExport$
  
  

Compatibility:

• Cadcorp SIS Desktop
• Cadcorp SIS ActiveX Modeller
• Cadcorp SIS ActiveX Manager

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