Photometric Interpretations


DICOM allows various relationships between the pixel data and how the image should be displayed. The values here are found in element 0028,0004 and every image should have that value.

All the following are supported by DicomObjects

Contents

  1. MONOCHROME2
  2. MONOCHROME1
  3. PALETTE COLOUR
  4. RGB
  5. YBR FULL
  6. YBR FULL 422
  7. YBR PARTIAL 422
  8. YBR RCT
  9. YBR ICT

MONOCHROME2

MONOCHROME1

PALETTE COLOUR

RGB

YBR FULL

YBR FULL 422

The YBR FULL 422 photometric interpretation is commonly used with lossy JPEG data.

Each pair of pixels occupies 4 bytes, each pixel having its own luminance (Y) value, but sharing the chroma (R - “redness” and B- “blueness”) values.

In theory, this is also allowed for uncompressed data, but experience shows that many cheaper viewers do not support it. In uncompressed data, the values are stored as “packed cells”, as follows:

Y Y B R Y Y B R Y Y B R….

YBR PARTIAL 422

YBR RCT

YBR ICT


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