read_regionread_regionReadRegionReadRegion (Operator)

Name

read_regionread_regionReadRegionReadRegion — Read binary images or HALCON regions.

Signature

Description

The operator read_regionread_regionReadRegionReadRegionReadRegion reads regions from a binary file.

The following formats are currently supported:

HALCON Iconic Object (HOBJ) (HALCON 12.0 or higher):

File format for iconic HALCON objects. The HOBJ file must contain only regions to be readable by read_regionread_regionReadRegionReadRegionReadRegion. If other objects (e.g. images or XLDs) are stored in the file, an exception is raised. In this case read_objectread_objectReadObjectReadObjectReadObject can be used to read the corresponding HOBJ file. The HOBJ format is the default file format for regions. Therefore, the extension '.hobj'".hobj"".hobj"".hobj"".hobj" does not have to be specified when reading or writing the file. See write_objectwrite_objectWriteObjectWriteObjectWriteObject for more information about the HOBJ format.

HALCON regions:

File format for HALCON regions. This file format supports multiple regions in a single file. The file extension is '.reg'".reg"".reg"".reg"".reg". This format is now legacy and the HOBJ format should be used instead.

Tiff:

Binary Tiff images with extension 'tiff'"tiff""tiff""tiff""tiff" or 'tif'"tif""tif""tif""tif". A tiff image can contain any number of regions. The color white is used as foreground.

PNG:

Binary PNG images with extension 'png'"png""png""png""png". The result is always one region. The color white is used as foreground.

BMP:

Binary Windows bitmap images with extension 'bmp'"bmp""bmp""bmp""bmp". The result is always one region. The color white is used as foreground.

A search path ('image_dir'"image_dir""image_dir""image_dir""image_dir") can be defined analogous to the operator read_imageread_imageReadImageReadImageReadImage.

Attention

The clipping based on the current image format is set via the operator set_system('clip_region',<'true'/'false'>)set_system("clip_region",<"true"/"false">)SetSystem("clip_region",<"true"/"false">)SetSystem("clip_region",<"true"/"false">)SetSystem("clip_region",<"true"/"false">). Consequently, if no image of suffcient size has been created before the call to read_regionread_regionReadRegionReadRegionReadRegion, set_system('clip_region','false')set_system("clip_region","false")SetSystem("clip_region","false")SetSystem("clip_region","false")SetSystem("clip_region","false") should be called before calling read_regionread_regionReadRegionReadRegionReadRegion to ensure that the region is not being clipped.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

Parameters

* Reading of regions and giving them gray values.
  read_image(Img,'ima_test')
  read_region(Regs,'reg_test')
  reduce_domain(Img,Regs,Res)

/* Reading of regions and giving them gray values. */
  read_image(&Img,"ima_test") ;
  read_region(&Regs,"reg_test") ;
  reduce_domain(Img,Regs,&Res) ;

* Reading of regions and giving them gray values.
  read_image(Img,'ima_test')
  read_region(Regs,'reg_test')
  reduce_domain(Img,Regs,Res)

* Reading of regions and giving them gray values.
  read_image(Img,'ima_test')
  read_region(Regs,'reg_test')
  reduce_domain(Img,Regs,Res)

* Reading of regions and giving them gray values.
  read_image(Img,'ima_test')
  read_region(Regs,'reg_test')
  reduce_domain(Img,Regs,Res)

Result

If the parameter values are correct the operator read_regionread_regionReadRegionReadRegionReadRegion returns the value 2 (H_MSG_TRUE). Otherwise an exception is raised.

Possible Predecessors

read_imageread_imageReadImageReadImageReadImage

Possible Successors

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomain, disp_regiondisp_regionDispRegionDispRegionDispRegion

See also

write_regionwrite_regionWriteRegionWriteRegionWriteRegion, read_imageread_imageReadImageReadImageReadImage, write_objectwrite_objectWriteObjectWriteObjectWriteObject

Module

Foundation