LEADTOOLS supports loading TIFF CMYK files without converting the data to BGR. This is done by loading each CMYK plane as a separate page in an
Image using
LoadCmykPlanes. Alpha channel information will be loaded into the 5th page, if present in the input file.
If the source file is not in the TIFF CMYK format, load the image normally with
Load and then obtain the CMYK planes by using
ColorSeparateCommand.
Paint the planes using
PaintCmykPlanes.
To save the planes as TIFF CMYK, call
SaveCmykPlanes. To save as another format, create a BGR
Image using
ColorMergeCommand and then save the image with
Save.
The
Image can be manipulated by manipulating each plane independently. Be careful when doing this. Some transformations should be done to all of the planes, while others should be done only to a particular plane.
For example, when performing a spatial transformation (flip, resize, rotate, etc), perform the same spatial transformation on all of the planes. Otherwise, there may be unwanted or unexpected results.
Other transformations should be done to a particular plane. For example, the K plane controls the amount of black ink. Changing the intensity of the K plane will darken or lighten the bitmap. Changing the brightness of one of the other planes will change the color rather than the image brightness. Be sure to study how the CMYK planes are combined to make the final image, in order to have a good understanding of what is needed to achieve a particular result.
