gray_opening_rectgray_opening_rectGrayOpeningRectGrayOpeningRect (Operator)

Name

gray_opening_rectgray_opening_rectGrayOpeningRectGrayOpeningRect — Perform a gray value opening with a rectangular mask.

gray_opening_rectgray_opening_rectGrayOpeningRectGrayOpeningRectGrayOpeningRect applies a gray value opening to the input image ImageImageImageImageimage with a rectangular mask of size (MaskHeightMaskHeightMaskHeightMaskHeightmaskHeight, MaskWidthMaskWidthMaskWidthMaskWidthmaskWidth). The resulting image is returned in ImageOpeningImageOpeningImageOpeningImageOpeningimageOpening. If the parameters MaskHeightMaskHeightMaskHeightMaskHeightmaskHeight or MaskWidthMaskWidthMaskWidthMaskWidthmaskWidth are even, they are changed to the next larger odd value. At the border of the image the gray values are mirrored.

The gray value opening of an image i with a rectangular structuring element s is defined as

Note that filter operators may return unexpected results if an image with a reduced domain is used as input. Please refer to the chapter Filters.

ImageImageImageImageimage (input_object) (multichannel-)image(-array) → object (byte / direction / cyclic / uint2 / int2 / int4 / real)

Input image.

ImageOpeningImageOpeningImageOpeningImageOpeningimageOpening (output_object) (multichannel-)image(-array) → object (byte / direction / cyclic / uint2 / int2 / int4 / real)

Gray-opened image.

MaskHeightMaskHeightMaskHeightMaskHeightmaskHeight (input_control) extent.y → (integer)

Height of the filter mask.

Default value: 11

Suggested values: 3, 5, 7, 9, 11, 13, 15

Typical range of values: 3 ≤ MaskHeight MaskHeight MaskHeight MaskHeight maskHeight ≤ 511

Minimum increment: 2

Recommended increment: 2

Restriction: odd(MaskHeight)

MaskWidthMaskWidthMaskWidthMaskWidthmaskWidth (input_control) extent.x → (integer)

Width of the filter mask.

Default value: 11

Suggested values: 3, 5, 7, 9, 11, 13, 15

Typical range of values: 3 ≤ MaskWidth MaskWidth MaskWidth MaskWidth maskWidth ≤ 511

Minimum increment: 2

Recommended increment: 2

Restriction: odd(MaskWidth)

gray_opening_rectgray_opening_rectGrayOpeningRectGrayOpeningRectGrayOpeningRect returns 2 (H_MSG_TRUE) if all parameters are correct. If the input is empty the behavior can be set via set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>). If necessary, an exception is raised.

Foundation