Denso RC5 Dokumentacja Pobierz pdf (Strona 146)

P Tile Method

This method detects the binarization level where the object area coincides with

Sx, by the use of a histogram when the object’s white and black area is

already known as Sx.

If the object is white, the area is obtained by adding pixels from a higher

brightness value of the histogram. If the calculated result reaches Sx at the

brightness level, the brightness value is set as the binarization level.

If the object is black, the area is obtained by adding pixels from a lower

brightness value. The binarizatioin level is obtained in the same manner as the

This method is effective when the object area is known beforehand.

Detection direction of white object

Fig. 5-10 Binarization Level Due to P Tile Method

Number of pixels

Binarization Level

Denso RC5 Dokumentacja Strona 146