MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guia do Utilizador descarregar pdf (Página 110)

4 Conversions

a gamma corrected signal. Set the Image signal parameter to Separate

color signals

9 Use the Chroma Resampling block to downsample the chroma components

of the image from the 4:4:4 format to the 4 :2:2 format. Use the default

parameters.

The dimensions of the output of the Chroma R esampling block are smaller

than the dimensions of the input. Therefore, the output signal requires less

bandwid th for trans mission.

10 Use the Ch

roma Resampling1 block to upsample the chroma components of

the image

from the 4:2 :2 fo rmat to the 4:4:4 forma t . Set the Resampling

paramet

er to

4:2:2 to 4:4:4.

11 Use the Color Space Conversion1 block to convert the input values from the

Y’CbCr color space to the R’G’B’ color space. Set the block parameters as

follows:

• Conversion =

Y'CbCr to R'G'B'

• Image signal = Separate color signals

12 UsetheVideoViewerblocktodisplay the recovered image. Set the Image

signal parameter to

Separate color signals .

13 Connect

the blocks a s sh own in the following fig ure.

4-24

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 251 252

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MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guia do Utilizador Página 110