Black Level and Dynamic Decoding

Last post 01-28-2008 8:49 AM by Ben Hejl. 1 replies.

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01-28-2008 8:26 AM

kthxbye
Joined on 10-29-2007
Points 39

Black Level and Dynamic Decoding

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As I understood, the black level is the average background grey level. In dynamic

decoding option SD does ignore areas which have a grey level below this value.

Most of the time the codes are printed in black on white background (at least on paper),

how does this work then? What value should be set in such a case to speed up decoding?

Regards

kthxbye

Post Points: 4

01-28-2008 8:49 AM In reply to

Ben Hejl
Joined on 05-11-2007
Cherry Hill, New Jersey
Points 151

Re: Black Level and Dynamic Decoding

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Dynamic processing is designed to increase performance for situations where you have a bright object containing a bar code on a large dark background. A typical scenario where dynamic processing can improve performance is a conveyor belt application. In this type of application you have a bright package on a black conveyor belt. Dynamic processing works to only perform bar code decoding on the package ignoring the conveyor belt. Dynamic processing is not designed to improve performance where the entire background of the image is bright, for example a white piece of paper.

Filed under: Dynamic processing

Post Points: 1

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