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US 7,451,931 B2Granted
Detecting barcodes on two-dimensional images using frequency domain data
AssigneeIntermec IP Corp.
InventorsMichael W. Dant, Robert A. Kohtz
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Abstract
A system and method of detecting a barcode involves obtaining a two-dimensional source image and converting it into a frequency domain image (FDI). Frequency trends in the FDI are then analyzed to determine whether barcode information is present in the FDI. In this way, the presence, location, orientation, size and symbology of a barcode can be quickly and accurately determined.
Claims19
A method of detecting a barcode comprising:
- obtaining a two-dimensional source image;
- converting the two-dimensional source image into a frequency domain image (FDI);
- and
- analyzing frequency trends in the FDI to determine whether barcode information is present in the FDI by determining whether clusters of high magnitude frequencies that indicate the presence of a barcode are present in the FDI.
1 more element
A method of detecting a barcode comprising:
- obtaining a two-dimensional source image;
- performing discrete Fourier transforms on row and column information of the two-dimensional source image to convert the two-dimensional source image into a frequency domain image (FDI);
- analyzing frequency trends in the FDI to detect clusters of high magnitude frequencies that form a shape in the FDI that indicates at least one of presence, location, symbology, orientation and size of a barcode.
A system for detecting a barcode comprising:
- a scanner and image generator for obtaining a two-dimensional source image from an object in a scan region of the scanner;
- a frequency domain image (FDI) converter for converting the two-dimensional source image into an FDI;
- and
- a frequency trend analyzer for analyzing frequency trends in the FDI to determine whether barcode information is present in the FDI by detecting clusters of high magnitude frequencies that form a shape in the FDI that indicates at least one of presence, location, symbology, orientation and size of a barcode.
1 more element
Dependencies are inferred from the claim text.