Subpixel Gray Value Morphology

• Classical gray value morphology is limited to pixel precision
• Therefore, the objects can be dilated or eroded by a multiple of one pixel
• This makes it difficult, e.g., to extract defects that have an extent of only one pixel
• HALCON 7.1 allows to dilate, erode, open, and close by any fraction
• This offers new opportunities to various application areas, such as
  • Optical character recognition
  • Optical character verification
  • Print inspection

application examples
:: Subpixel morphology allows to carefully modify the extend of objects    - modification of the stroke width for OCR training    - a dilation with a radius of 1 is already too much in many cases     Input image   Radius 0.5   Radius 1