GET_PIXEL

GET_PIXEL

Returns the pixel value of a specified position in the selected image

Syntax
Details
Example

Syntax

rc=IMGOP(task-id, 'GET_PIXEL', x, y, red<, green, blue>);

x

is the row location in the image.

Type: Numeric

y

is the column location in the image.

Type: Numeric

red

is either the red value of an RGB image or the pixel value for a CMAP or GRAY image.

Type: Numeric

green

is the green value for an RGB image and is ignored for all others.

Type: Numeric

blue

is the blue value for an RGB image and is ignored for all others.

Type: Numeric

Details

The color values for a CMAP image or an RGB image must be between 0 and 255. If any value is out of range, an error is returned. For a GRAY image, GET_PIXEL returns a red value of either 0 or 1.

Example

See the example for CREATE_IMAGE.

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