How does DCMTK perform window leveling on RGB images?
Does it just do the window level formula on each color channel per pixel?
Is the SetWindow method of DicomImage + GetOutput fast enough to be called in real time so that I can change the window level interactively on the fly?
How does DCMTK perform window leveling on RGB images?
DCMTK currently does not support windowing on RGB images.
Is the SetWindow method of DicomImage + GetOutput fast enough to be called in real time so that I can change the window level interactively on the fly?
This depends, of course, on the underlying hardware platform but in principle: yes, it is fast enough to perform windowing in real-time. For example, we've developed a mammography viewing software which offers interactive windowing on high-resolution screens. An alternative could be to perform the interactive windowing on a specific image region only (see DicomImage::setRoiWindow()).
i don't know whether it's DCMTK not support windows leveling on RGB color dicom or, the dicom standard says that. since i found Sante DICOM viewer can adjust window center/width when displaying RGB color image.
Why don't you just read the relevant sections of the DICOM standard, e.g. PS 3.3-2009 section C.11.2.1.2 (Window center and window width):
These Attributes shall be used only for Images with Photometric Interpretation (0028,0004)
values of MONOCHROME1 and MONOCHROME2. They have no meaning for other Images.
