Image Data Model: _getPixel

Image Data Model: _getPixel

Returns the pixel value of a specified position in an image

Syntax
Details

Syntax

CALL SEND (object-id, '_getPixel', x, y, pix_val|red, green, blue);

Argument Type Description

x
N the row location in the image

y
N the column location in the image

pix-val
N for images of type CMAP, a pixel value in the range 0...255 that is the index of the color being returned; for images of type GRAY, a pixel value that is either 1 or 0

red, green, blue
N for images of type RGBA, the red, green, and blue values of the pixel color being returned; values should be in the range 0...255

Argument	Type	Description
x	N	the row location in the image
y	N	the column location in the image
pix-val	N	for images of type CMAP, a pixel value in the range 0...255 that is the index of the color being returned; for images of type GRAY, a pixel value that is either 1 or 0
red, green, blue	N	for images of type RGBA, the red, green, and blue values of the pixel color being returned; values should be in the range 0...255

Details

The _getPixel method returns an error if any value is outside the range.

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