rgb1_to_grayrgb1_to_grayRgb1ToGrayRgb1ToGray (Operator)

Name

rgb1_to_grayrgb1_to_grayRgb1ToGrayRgb1ToGray — Transform an RGB image into a gray scale image.

Signature

rgb1_to_gray(RGBImage : GrayImage : : )

rgb1_to_grayrgb1_to_grayRgb1ToGrayRgb1ToGrayRgb1ToGray transforms an RGB image into a gray scale image. The three channels of the RGB image are passed as the first three channels of the input image. The image is transformed according to the following formula:

   gray = 0.299 * red + 0.587 * green + 0.114 * blue .

If one of the input images in RGBImageRGBImageRGBImageRGBImageRGBImage is a single-channel image its reference will be simply copied to the output GrayImageGrayImageGrayImageGrayImagegrayImage.

Execution Information

Supports OpenCL compute devices.
Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Automatically parallelized on tuple level.
Automatically parallelized on domain level.

Parameters

RGBImageRGBImageRGBImageRGBImageRGBImage (input_object) (multichannel-)image(-array) → object (byte / int2 / uint2 / real)

Three-channel RBG image.

GrayImageGrayImageGrayImageGrayImagegrayImage (output_object) singlechannelimage(-array) → object (byte / int2 / uint2 / real)

Gray scale image.

Example (HDevelop)

* Transformation from rgb to gray
read_image(Image,'patras')
dev_display(Image)
rgb1_to_gray(Image,GrayImage)
dev_display(GrayImage)

Example (C)

/* Transformation from rgb to gray  */
read_image(Image,"patras") ;
disp_color(Image,WindowHandle) ;
rgb1_to_gray(Image,&GrayImage) ;
disp_image(GrayImage,WindowHandle);

Example (HDevelop)

* Transformation from rgb to gray
read_image(Image,'patras')
dev_display(Image)
rgb1_to_gray(Image,GrayImage)
dev_display(GrayImage)

Example (HDevelop)

* Transformation from rgb to gray
read_image(Image,'patras')
dev_display(Image)
rgb1_to_gray(Image,GrayImage)
dev_display(GrayImage)

Example (HDevelop)

* Transformation from rgb to gray
read_image(Image,'patras')
dev_display(Image)
rgb1_to_gray(Image,GrayImage)
dev_display(GrayImage)

Possible Predecessors

compose3compose3Compose3Compose3Compose3

Alternatives

trans_from_rgbtrans_from_rgbTransFromRgbTransFromRgbTransFromRgb, rgb3_to_grayrgb3_to_grayRgb3ToGrayRgb3ToGrayRgb3ToGray

Module

Foundation

Operators