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1. WO2004097732 - PROCEDE ET DISPOSITIF DE COMPTAGE POUR SUBSTRATS PLANS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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Claims

1. Process for counting planar substrates, such as sheets of securities or banknotes, checks, cards and other similar objects, piled in a pack and comprising the following steps :
(a) loosening the pack of piled substrates;
(b) taking a first image of the edges of the piled planar substrates on a first counting side of said pack, said image being made of a two-dimensional array of single image detectors arranged in lines and columns;
(c) for each column of single image detectors of said array, counting the number of edges of substrates detected in each line of single image detectors to obtain a counting value for each column;
(d) statistically treating the result obtained from step (c) for determining which counting values are obtained and how often;
(e) based on the statistical treatment, determining whether the counting is accurate.

2. Process as claimed in claim 1, wherein the statistical treatment comprises the following steps:
(dl) comparing the counting values obtained in each column;
(d2) setting the result value of the counting to the most frequently obtained value in step (c) ;
(d3) for each other value of number of edges obtained in each other column, comparing the number of occurrences of said other value with respect to the result value obtained in step (d2) .

3. Process as claimed in one of the preceding claims, wherein step (a) is made by air under pressure.

4. Process as claimed in one of the preceding claims, wherein said single image detectors are pixels.

5. Process as claimed in one of claims 2 to 4, wherein in step (d2) , if the result value is different than a predetermined value, determining the counting operation is not accurate .

6. Process as claimed in one of claims 2 to 5, wherein in step (d3) , if each other counting values obtained occur more than a predetermined percentage with respect to the most frequently obtained value, determining the counting operation is not accurate.

7. Process as claimed in claim 6, wherein said predetermined percentage is 10 percent.

8. Process as claimed in one of the preceding claims, wherein a second image is taken of said pile, said image undergoing the steps defined in the preceding claims .

9. Process as claimed in claim 8, wherein said second image is taken on a second counting side of the pile.

10. Device for carrying out the process as defined in one of the preceding claims, whereby said device comprises at least a loosening device (7) for loosening piles (1) of substrates, an imaging device (2) for taking a picture of a counting side (3) of said pile (1) and treatment means (10,11,12,13) to apply said counting process and said statistical treatment to the images and output means (14) to output the result of the counting process.

11. Device as claimed in claim 10, wherein said loosening device is an air blowing means (7) .

12. Device as claimed in claim 10 or 11, wherein said imaging device is a CCD camera (2) .

13. Device as claimed in one of claims 10 to 12, wherein it further comprises illuminating means (8) .

14. Device as claimed in one of claims 10 to 13, wherein said treatment means comprise at least a computer (9) .