Determine the minimum gray value within a rectangle.
gray_erosion_rect calculates the minimum gray value of the input image Image within a rectangular mask of size (MaskHeight, MaskWidth) for each image point. The resulting image is returned in ImageMin. If the parameters MaskHeight or MaskWidth are even, they are changed to the next larger odd value. At the border of the image the gray values are mirrored.
|
Image (input_object) |
image(-array) -> object : byte / direction / cyclic / int2 / int4 / real |
| Image for which the minimum gray values are to be calculated. | |
|
ImageMin (output_object) |
image(-array) -> object : byte / direction / cyclic / int2 / int4 / real |
| Image containing the minimum gray values. | |
|
MaskHeight (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 <= 511 (lin) | |
| Minimum increment: 2 | |
|
Recommended increment: 2 | |
| Restriction: odd(MaskHeight) | |
|
MaskWidth (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 <= 511 (lin) | |
| Minimum increment: 2 | |
|
Recommended increment: 2 | |
| Restriction: odd(MaskWidth) | |
gray_erosion_rect 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>). If necessary, an exception is raised.
gray_erosion_rect is reentrant and automatically parallelized (on tuple level, channel level, domain level).
Foundation
