ImageTools
YUVtoRGB
convert a YUV color image to an RGB color image
Calling Sequence
Parameters
Options
Description
Examples
YUVtoRGB( img, opts )
img
-
ColorImage or ColorAImage; input image
opts
(optional) equation(s) of the form option = value; specify options for the YUVtoRGB command
inplace = truefalse
Specifies whether the operation is performed in-place. This can be used to avoid allocating memory. The default is false.
output = Image
Specifies a data structure into which the output is written. This can be used to avoid allocating memory. The size and number of layers must match that of the input. The dimensions of the output image are adjusted so that the row and column indices match the input. The default is NULL.
The YUVtoRGB command converts a color image with a YUV color representation to an RGB color representation. The following linear transformation is applied at each position in the image to the three color layers:
Matrix⁡r,g,b=Matrix⁡1.,−0.00003945707070713,1.13982796717171708,1.,−0.39461016414141419,−0.58050031565656568,1.,2.03199968434343425,−0.00048137626262628⁢Matrix⁡y,u,v
The alpha channel (layer 4), if present, is not affected.
The img parameter is the input image and must be of type ColorImage or ColorAImage.
with⁡ImageTools:
Create three monochromatic layers representing the YUV layers and then combine them into a single image.
img_y≔Create⁡100,200,r,c↦sin⁡0.0025⋅c2+r2:
img_y≔0.2⁢1+2⁢FitIntensity⁡img_y:
img_u≔Create⁡100,200,r,c↦c:
img_u≔0.436⁢−1+2⁢FitIntensity⁡img_u:
img_v≔Create⁡100,200,r,c↦r:
img_v≔0.615⁢−1+2⁢FitIntensity⁡img_v:
img_yuv≔CombineLayers⁡img_y,img_u,img_v:
Convert the color image to an RGB representation and then extract each layer as a separate monochromatic image.
img_rgb≔YUVtoRGB⁡img_yuv:
img_r,img_g,img_b≔op⁡map2⁡GetLayer,img_rgb,1,2,3:
Display the original YUV layers (after rescaling to an intensity between 0 and 1), the RGB image, and the RGB layers.
Embed⁡map⁡FitIntensity,img_y,img_u,img_v
Embed⁡img_rgb
Embed⁡img_r,img_g,img_b
See Also
ImageTools[ColorTransform]
ImageTools[RGBtoYUV]
Download Help Document