Method and apparatus for identifying symbol bearing gaming balls

Patent metadata

Field	Value
Publication number	US-9251415-B2
Application number	US-201213980487-A
Country	US
Kind code	B2
Filing date	Jan 23, 2012
Priority date	Jan 21, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

A method for identifying a selected playing ball from a prescribed number of playing balls, wherein each of the playing balls is provided with a different symbol, wherein: a) the selected playing ball is moved from a starting position past an image recording unit pickup, b) the mass center of the depiction of the selected playing ball in the image is kept unaltered for a prescribed, c) the image position and size of the depiction of the playing ball is ascertained, and a check is performed to determine whether portions of the depiction of the playing ball are situated outside a lateral of the image, and d) if portions of the depiction of the playing ball are situated outside said lateral edge, the playing ball is returned to the pickup area of the image recording unit and/or is repositioned and steps b) to d) are repeated.

First claim

The invention claimed is:

1. A method of identifying a selected gaming ball from a predefined number of gaming balls, each of the gaming balls being provided with a symbol, which is different from the symbols of the other gaming balls, the method comprising:
a) acquiring an image of a selected gaming ball moving from a starting position through an acquisition area of an image recording unit,
b) determining from the acquired image the center of mass of the selected gaming ball and maintaining the center of mass unaltered in the acquired image in the image recording unit for a predefined period of time and limiting relative movement of the center of mass with respect to the image,
c) determining the position and size of the image of the gaming ball and verifying whether parts of the image of the gaming ball are located outside a lateral edge predefined with respect to the image, and,
d) if parts of the image of the gaming ball are outside of this lateral edge, the gaming ball is shifted based on the calculated position along or opposite the progressing direction of the path of the gaming ball and brought back to the acquisition area of the image recording unit and repositioned, and steps b) to d) are repeated, and
e) based on at least one image recorded with the image recording unit, identifying the symbol which is unambiguously associated with the selected gaming ball.

2. The method in accordance with claim 1 , wherein, fixing the center of mass of the selected gaming ball in the image of the image recording unit, the gaming ball is stopped and remains motionless with respect to the image recording unit.

3. The method in accordance with claim 1 , wherein the gaming ball is moved from the starting position along a predefined path through the acquisition area of the image recording unit by a ball guiding unit, wherein the respective selected gaming aurin ball is removed from the ball guiding unit after moving on its predefined path and optionally forwarded.

4. The method in accordance with claim 3 , wherein the selected gaming ball is moved forward on the predefined path in the form of a circular arc on a horizontal plane, wherein the recording direction or line of sight of the image recording unit is essentially horizontal and directed to a spot on the predefined path in which the gaming ball is closest to the image recording unit.

5. The method in accordance with claim 3 , wherein the gaming ball is received by a circular recess of the ball guiding unit, which is essentially designed to be flat and discoid, and is secured against rolling away laterally, wherein
a) the gaming ball is tossed into and/or falls onto the circular recess from above and wherein the fall of the gaming ball is decelerated, in particular by an elastic damping unit disposed below the recess, and/or
b) the gaming ball is guided and/or rotated in the recess of the ball guiding unit and supported on a base plate located beneath the discoid ball guiding unit and/or
c) the gaming ball falls through a recess located in the base plate and/or located beneath the ball guiding unit and is transported further.

6. The method in accordance with claim 1 , wherein the image recording unit permanently produces images in predefined time intervals and that these images are shown on a monitor so to be visible for the players.

7. The method in accordance with claim 1 , wherein, during the predefined period, a number of, in particular four, images is produced and identification of the gaming ball takes place based on at least two of images recorded at different time points, wherein identification is done separately for each of the images and wherein each identification of an image delivers a separate identification result.

8. A method of identifying a selected gaming ball from a predefined number of gaming balls, each of the gaming balls being provided with a symbol, which is different from the symbols of the other gaming balls, the method comprising:
a) acquiring an image of a selected gaming ball moving from a starting position through an acquisition area of an image recording unit,
b) determining from the acquired image the center of mass of the selected gaming ball and maintaining the center of mass unaltered in the acquired image in the image recording unit for a predefined period of time and limiting relative movement of the center of mass with respect to the image,
c) determining the position and size of the image of the gaming ball and verifying whether parts of the image of the gaming ball are located outside a lateral edge predefined with respect to the image, and,
d) if parts of the image of the gaming ball are outside of this lateral edge, the gaming ball is shifted based on the calculated position along or opposite the progressing direction of the path of the gaming ball and brought back to the acquisition area of the image recording unit and repositioned, and steps b) to d) are repeated, and
e) based on at least one image recorded with the image recording unit, identifying the symbol which is unambiguously associated with the selected gaming ball,
wherein an identification result is determined based on a recorded image, wherein symbols of writing are used as symbols and wherein symbols of writing arranged in circles are arranged on the gaming balls, and wherein a marking line representing the direction of writing is provided, which is, in particular, arranged below in writing direction and equally represents an underline under the respective symbol of writing, wherein the marking line is, in particular, connected to the circle, in particular via an auxiliary line, by
finding areas of the image of the gaming ball and saving them as recognition areas, which are limited by an, in particular solid, circular line,
for all areas limited by circular edges that were found, determining the orientation of the symbol located within the area, rotating the found image areas according to their orientation so that the determined symbols are each uniformly orientated, and
first filtering the symbols of writing located in the oriented and/or rotated areas and then subjecting them to a symbol recognition procedure and, for each of the oriented areas, determining an identification result representing the respective symbol.

9. The method in accordance with claim 8 , wherein for all areas limited by circular edges that were found, the orientation of the symbol located within the area is determined by finding the image of a marking line abutting, or connected to, the circular line and determining its orientation.

10. The method in accordance with claim 8 , wherein the image areas are scaled to a predefined dimension after being oriented.

11. The method in accordance with claim 8 , wherein, in the case of differing identification results for multiple areas, that identification result is considered to be determined which has been recognized for the majority of areas.

12. A device for identifying a selected gaming ball from a predefined number of gaming balls, each of the gaming balls being provided with a symbol, which is different from the symbols of the other gaming balls,
a) comprising an image recording unit, which has an acquisition area,
b) comprising means of moving the selected gaming ball from a starting position through the acquisition area of the image recording unit,
c) comprising an examining unit for examining the position and size of the image of the gaming ball as well as for producing a positioning signal in case parts of the image of the gaming ball are located outside a lateral edge predefined with respect to the image, and,
d) a positioning unit downstream of the examining unit, which causes the means fo

Assignees

• Rommer Christian
• Novomatic Ag

Inventors

• Rommer Christian

Classifications

• G06F2218/12

  Classification; Matching · CPC title

• G06V20/63 Primary

  Scene text, e.g. street names · CPC title

• G07C15/001

  with balls or the like · CPC title

• G06K9/3258

  Physics · mapped topic

• G06K9/00536 Primary

  Physics · mapped topic