Festo SBSC-EN, Руководство пользователя

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Vision Sensor SBSI/SBSC-EN, 8062650 - 1607b - 13/09/2016 Page 157
Vision Sensor Manual
Basic settings for characters to read.
Fig. 156: Detector OCR, tab Character
Parameters Functions
Character height Max. height of character in pixels.
Character width Max. width of character in pixels.
Stroke width Average width of lines of characters in pixels.
Polarity Possibility to select between dark characters on bright background or vice versa.
Text orientation
„Font horizontal in Image“: text has to be horizontal in camera image. Rotated text
will be not read or wrong read.
„Font horizontal in ROI“: by rotation of ROI a rotation angle for reading of rotated
text can be specified.
Max. number of
lines
Max. number of lines to read.
Upper case only Limitation to capital letters only.
Connect dots to
characters Connects single dots, e.g. of a dotted font or of a bad printed font for complete
characters.
Overlay character
size
Switch on and off overlay rectangle for size of letters.
Overlay
segmentation
Switch on and off coloured overlay for segmentation of characters.
For newly generated detectors, all parameters are preset as standard values, suitable for many
applications.
Optimisation:
Execution speed:
l
Search zone for character (yellow frame) only as large as necessary
4.6.3.12.3 Detector OCR, tab Segmentation
Definition of basic settings of characters to read.
Detector OCR, tab Character (flexible) (Page 156)