pixel access methods - what is difference ?

[pboninsk]

Hi,

As far as I know there are 2 ways of access to pixels:

- DcmDataset->findAndGetUint16Array(DCM_PixelData, buff) - described as way to get "raw" pixels"
- DicomImage->getOutputData - descibed as way to get "rendered" pixels.

What is exact difference between these methods ?

[Jörg Riesmeier]

The answer is already part of your question: the first method returns the "raw" (i.e. unprocessed) pixel data as stored in the Pixel Data element; the second method transforms the stored pixel data according to the (grayscale) transformation pipeline as described in the DICOM standard (i.e. applies modality and VOI transform if applicable).