read_gray_se — Load a structuring element for gray morphology.
read_gray_se loads a structuring element for gray morphology from a file. The file names of these structuring elements must end in '.gse' (for gray-scale structuring element). This suffix is automatically appended by read_gray_se to the passed file name, and thus must not be passed. The structuring element's data must be contained in the file in the following format: The first line specifies the data type of the structuring element as 'byte', 'uint2' or 'real' (without enclosing quotes). It must match the image type of the image to be processed in subsequent operator calls using this structuring element. The following two numbers in the file determine the width and height of the structuring element and determine a rectangle enclosing the structuring element. Both values must be greater than 0. Then the number of chords of the region to be defined follows. Then the chords themselves follow: Each chord is defined by the row of the chord (L), the column begin (CB) and the column end (CE), separated by a space between them. Then values follow that are regarded as the corresponding values for gray morphology (their number depends on the defined width and height of the structuring element). Values that will not be part of the region of the structuring element (because no chord is defined for this points) must not be omitted. Nevertheless they will be ignored in the resulting structuring element. Structuring elements are stored internally as images with the data type specified above. Normal images can also be used as structuring elements, where the region of the image defines the shape of the structuring element. However, take care not to use too large images, since the runtime is proportional to the area of the image multiplied by the area of the structuring element. Flat structuring elements (i.e. elements with constant grayvalues) will be executed particularly fast though. The origin of the structuring element lies at half of the defined width and height. For even dimensions the origin will be rounded towards the upper left corner. The structuring element can be saved as image with the help of the operator write_image. However, take care to use an image format that supports alpha channels to save the shape of the structuring element such as 'tiff', 'jp2' or 'png'. These files can then be loaded again with the operator read_image.
Generated structuring element.
Name of the file containing the structuring element.
File extension: .gse
* Load a byte structuring element of width 3 and height 3 that * consists of 3 chords at lines 0 (from x=1 to x=1), 1 (from x=0 * to x=2) and 2 (from x=1 to x=1). The (used) grayvalues are * 0, 0, 1, 0, 0 . * contents of file 'isod4.gse': * byte * 3 3 * * 3 * 0 1 1 * 1 0 2 * 2 1 1 * * -1 0 -1 * 0 1 0 * -1 0 -1 read_gray_se (SE, environment('HALCONROOT')+'/filter/isod4')
read_gray_se returns 2 (H_MSG_TRUE) if all parameters are correct. Otherwise, an exception is raised.
gray_erosion, gray_dilation, gray_opening, gray_closing, gray_tophat, gray_bothat, write_image
gen_disc_se, read_image, change_domain
paint_region, paint_gray, crop_part