Combined Color Conversion Functions

This section describes Intel IPP functions that perform sampling, color conversion and level shift (transition from unsigned data range to the signed one and vice versa) and are specific for JPEG codec. These functions are listed in Table “Combined Color Conversion Functions”.

Here MCU stands for JPEG Minimum Coded Unit , that is, an interleaved set of blocks of size determined by the sampling factors (see Figure “MCU Structure for Different JPEG Sampling Formats”), or a single block in a non interleaved scan.

All functions implement the level shift operation in accordance with its definition by [ISO10918], Annex A.3.1, Level Shift.

• RGBToYCbCr444LS_MCU
  Converts an RGB image to the YCbCr color model and creates 444 MCU.
• RGBToYCbCr422LS_MCU
  Converts an RGB image to the YCbCr color model and creates 422 MCU.
• RGBToYCbCr411LS_MCU
  Converts an RGB image to the YCbCr color model and creates 411 MCU.
• BGRToYCbCr444LS_MCU
  Converts a BGR image to the YCbCr color model and creates 444 MCU.
• BGR565ToYCbCr444LS_MCU, BGR555ToYCbCr444LS_MCU
  Convert a BGR image to the YCbCr color model and create 444 MCU.
• BGRToYCbCr422LS_MCU
  Converts an BGR image to the YCbCr color model and creates 422 MCU.
• BGR565ToYCbCr422LS_MCU, BGR555ToYCbCr422LS_MCU
  Convert an BGR image to the YCbCr color model and create 422 MCU.
• BGRToYCbCr411LS_MCU
  Converts an BGR image to the YCbCr color model and creates 411 MCU.
• GR565ToYCbCr411LS_MCU, BGR555ToYCbCr411LS_MCU
  Convert an BGR image to the YCbCr color model and create 411 MCU.
• CMYKToYCCK444LS_MCU
  Converts a CMYK image to the YCCK color model and creates 4444 MCU.
• CMYKToYCCK422LS_MCU
  Converts a CMYK image to the YCCK color model and creates 4224 MCU.
• CMYKToYCCK411LS_MCU
  Converts a CMYK image to the YCCK color model and creates 4114 MCU.
• YCbCr444ToRGBLS_MCU
  Creates an YCbCr image from 444 MCU and converts it to the RGB color model.
• YCbCr422ToRGBLS_MCU
  Creates an YCbCr image from 422 MCU and converts it to the RGB color model.
• YCbCr411ToRGBLS_MCU
  Creates an YCbCr image from 411 MCU and converts it to the RGB color model.
• YCbCr444ToBGRLS_MCU
  Creates an YCbCr image from 444 MCU and converts it to the BGR color model.
• YCbCr444ToBGR565LS_MCU, YCbCr444ToBGR555LS_MCU
  Create an YCbCr image from 444 MCU and convert it to the BGR color model.
• YCbCr422ToBGRLS_MCU
  Creates a YCbCr image from 422 MCU and converts it to the BGR color model.
• YCbCr422ToBGR565LS_MCU, YCbCr422ToBGR555LS_MCU
  Create an YCbCr image from 422 MCU and convert it to the BGR color model.
• YCbCr411ToBGRLS_MCU
  Creates an YCbCr image from 411 MCU and converts it to the BGR color model.
• YCbCr411ToBGR565LS_MCU, YCbCr411ToBGR555LS_MCU
  Create an YCbCr image from 411 MCU and convert it to the BGR color model.
• YCCK444ToCMYKLS_MCU
  Creates YCCK image from 4444 MCU and converts it to the CMYK color model.
• YCCK422ToCMYKLS_MCU
  Creates an YCCK image from 4224 MCU and converts it to the CMYK color model.
• YCCK411ToCMYKLS_MCU
  Creates an YCCK image from 4114 MCU and converts it to the CMYK color model.

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