Image type in DICOM Standard MONOCHROME1 and MONOCHROME2

Question

I have a question for image type in dicom standard. In the dicom document I found image type has five types which are :

MONOCHROME1
MONOCHROME2 MPEG2 -single component data
YBR_ICT
YBR_RCT
YBR_PARTIAL_420 MPEG2 -multi-component data

If image type in dicom file is MONOCHROME1 or MONOCHROME2, Is it compress or not compress? And What are different between two type: MONOCHROME1 or MONOCHROME2? Thanks

Answer 1

MONOCHROME1 indicates that the greyscale ranges from bright to dark with ascending pixel values, whereas MONOCHROME2 ranges from dark to bright with ascending pixel values.

Image compression is independent of the Photometric Interpretation (0028,0004) attribute. Compression is instead given by the Transfer Syntax UID (0002,0010) attribute.

You can read more in the short DICOM introduction here.