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Specifying Per-Band Compression Ratios

You can set individual compression ratios for each band in a multispectral image. Use per-band compression when you want to compress certain bands in an image more than others. For example, if you want to preserve the visual quality of a multispectral image, you can compress the RGB bands of the image less than the other bands. You can only set per-band compression ratios for MrSID Generation 4 output images.

1. Click the Add Image icon to add an image to the Job List.
2. Select the image in the Job List.
3. In the Properties tab, select MrSID Generation 4 from the Output Format drop-down.

4. In the Properties tab, click Job Options.

5. On the Compression tab, select the Per Band radio button.
6. Click Select Bands.
7. Select one or more bands from the list and enter a compression ratio in the Compression Ratio text field. Alternatively, select the Lossless check box for the selected bands.
8. Click Apply to Selected to set the compression ratio for the selected bands.
9. Click OK.