Back to results
US 11,113,490 B2Granted
System and method for evaluating symbols
AssigneeCognex Corporation
InventorGlenn Spitz
Life of this patent
Estimating the term…
Abstract
Evaluating a symbol on an object can include acquiring a first image of the object, including the symbol. A second image can be derived from the first image based upon determining a saturation threshold for the second image and possibly scaling of pixel values to a reduced bit-depth for the second image.
Claims20
A system for evaluating a symbol on an object, the system comprising:
- an imaging system that includes:
- an imaging device;
- and
- a processor device in communication with the imaging device;
- the imaging device being configured to acquire a first image of the object, including the symbol;
- and
- the processor device being configured to evaluate the symbol, using the first image, based upon:
- selecting a saturation threshold, with a first set of pixels of the first image being within the selected saturation threshold and a second set of pixels of the first image being outside of the selected saturation threshold;
- and
- analyzing pixels of the first image based on the selected saturation threshold, including mapping the second set of pixels of the first image to a maximum value, such that a brightness measurement of the first image that includes the first set of pixels and the mapped second set of pixels exhibits a predetermined target relationship with the selected saturation threshold.
7 more elements
A system for evaluating a symbol on an object, the system comprising:
- an imaging device;
- and
- a processor device in communication with the imaging device;
- the imaging device being configured to acquire a first image of the object, including the symbol, with a first bit depth;
- and
- the processor device being configured to analyze pixels of the first image to evaluate the symbol based upon:
- selecting a saturation threshold based upon a predetermined target relationship between the selected saturation threshold and a brightness measurement for the first image;
- and
- mapping a subset of pixels of the first image to updated pixel values based upon the selected saturation threshold.
6 more elements
A method for evaluating a symbol on an object, the method being at least partly implemented using an imaging device and a processor device, the method comprising:
- acquiring, with the imaging device, a first image of the object, including the symbol;
- adjusting the first image, with the processor device, by:
- selecting a saturation threshold based upon a target relationship between the selected saturation threshold and a brightness measurement of pixels of the first image before or after the first image is adjusted;
- and
- mapping first pixels of the first image that have values outside of the selected saturation threshold to a reduced value associated with the selected saturation threshold;
- and
- evaluating the adjusted first image, with the processor device, to determine at least one attribute of the symbol.
4 more elements
Dependencies are inferred from the claim text.