Determine the gray value range within a rectangle.
::gray_range_rect calculates the gray value range, i.e., the difference (max - min) of the maximum and minimum gray values, of the input image Image within a rectangular mask of size (MaskHeight, MaskWidth) for each image point. The resulting image is returned in ImageResult. 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) -> Hobject: HImage(Array) ( byte / direction / int4 / real ) |
| Image for which the gray value range is to be calculated. | |
|
ImageResult (output_object) |
image(-array) -> Hobject * : HImage(Array) ( byte / direction / int4 / real ) |
| Image containing the gray value range. | |
|
MaskHeight (input_control) |
extent.y -> HTuple.long |
| 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 -> HTuple.long |
| 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_range_rect returns H_MSG_TRUE if all parameters are correct. If the input is empty the behaviour can be set via ::set_system('no_object_result',<Result>). If necessary, an exception is raised.
::gray_dilation_rect, ::gray_erosion_rect, ::sub_image
Image filters
