Set single gray values in an image.
::set_grayval sets the gray values of the input image Image at the positions (Row,Column) to the values specified by Grayval. The number of values in Grayval must match the number of points passed to the operator.
|
Image (input_object) |
image -> Hobject: HImage |
| Image to be modified. | |
|
Row (input_control) |
point.y(-array) -> HTuple.long |
| Row coordinates of the pixels to be modified. | |
| Default value: 0 | |
| Suggested values: 0, 10, 50, 127, 255, 511 | |
| Typical range of values: 0 <= Row | |
| Restriction: (0 <= Row) && (Row < height(Image)) | |
|
Column (input_control) |
point.x(-array) -> HTuple.long |
| Column coordinates of the pixels to be modified. | |
| Default value: 0 | |
| Suggested values: 0, 10, 50, 127, 255, 511 | |
| Typical range of values: 0 <= Column | |
| Restriction: (0 <= Column) && (Column < width(Image)) | |
|
Grayval (input_control) |
grayval(-array) -> HTuple.double / long |
| Gray values to be used. | |
| Default value: 255.0 | |
| Suggested values: 0.0, 1.0, 10.0, 128.0, 255.0 | |
::set_grayval returns 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.
::read_image, ::get_image_pointer1, ::gen_image_proto, ::gen_image1
::get_image_pointer1, ::paint_gray, ::paint_region
::get_grayval, ::gen_image_const, ::gen_image1, ::gen_image_proto
Basic operators
