Process for reading a chain of code characters from a transparen

Details Process for reading a chain of code characters from a transparen Process for reading a chain of code characters from a transparen

1991-04-26

1994-04-05

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 8, 382 18, 235464, 250223B, G06K 900

Patent

active

053012380

ABSTRACT:
What is described is a process for reading a chain (34) of code characters which is arranged annularly on a transparent bottle (10) in the bottom area of the same, by photographing at least the bottom area of the bottle through the bottle neck by means of a camera (24) and simultaneously illuminating the bottom area of the bottle from below. With a zero relative speed of rotation between camera (24), bottle (10) and illumination source (32), a snapshot of the bottom area of the bottle with the complete code character chain (34) is taken from the inside of the bottle with the camera (24) and is stored as an image for the later decoding of the code character chain. The code-reading process is a very rapid process, because the fraction of a second in which the bottle (10) is in a line with the camera (24) and the illumination source (32) is adequate for reading the code. The evaluation of the image of the code character chain (34) which is photographed occurs using a histogram technique by comparison with a stored annular pattern which is divided into sectors.

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