read_region — Read binary images or HALCON regions.
The operator read_region reads regions from a binary file.
The following formats are currently supported:
File format for iconic HALCON objects. The HOBJ file must contain only regions to be readable by read_region. If other objects (e.g. images or XLDs) are stored in the file, an exception is raised. In this case read_object can be used to read the corresponding HOBJ file. The HOBJ format is the default file format for regions. Therefore, the extension '.hobj' does not have to be specified when reading or writing the file. See write_object for more information about the HOBJ format.
File format for HALCON regions. This file format supports multiple regions in a single file. The file extension is '.reg'. This format is now legacy and the HOBJ format should be used instead.
Binary Tiff images with extension 'tiff' or 'tif'. A tiff image can contain any number of regions. The color white is used as foreground.
Binary PNG images with extension 'png'. The result is always one region. The color white is used as foreground.
Binary Windows bitmap images with extension 'bmp'. The result is always one region. The color white is used as foreground.
A search path ('image_dir') can be defined analogous to the operator read_image.
The clipping based on the current image format is set via the operator set_system('clip_region',<'true'/'false'>). Consequently, if no image of suffcient size has been created before the call to read_region, set_system('clip_region','false') should be called before calling read_region to ensure that the region is not being clipped.
Name of the region to be read.
File extension: .hobj, .reg, .tif, .tiff, .png, .bmp
* Reading of regions and giving them gray values. read_image(Img,'ima_test') read_region(Regs,'reg_test') reduce_domain(Img,Regs,Res)
If the parameter values are correct the operator read_region returns the value 2 (H_MSG_TRUE). Otherwise an exception is raised.
write_region, read_image, write_object