access_channel — Access a channel of a multi-channel image.
The operator access_channel accesses a channel of the (multi-channel) input image. The result is a one-channel image. The definition domain of the input is adopted. The channels are numbered from 1 to n. The number of channels can be determined via the operator count_channels.
One channel of MultiChannelImage.
Index of channel to be accessed.
Default value: 1
Suggested values: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
Typical range of values: 1 ≤ Channel
read_image(&Color,"patras"); /* read color image */ access_channel(Color,&Red,1); /* extract red channel */ disp_image(Red,WindowHandle);
decompose2, decompose3, decompose4, decompose5