Indicia reading terminal including frame quality evaluation processing
DCFirst Claim
Patent Images
1. An indicia reader comprising:
- an image sensor for generating frames of image data;
a processor in communication with the image sensor, the processor being configured for;
capturing a succession of frames of image data with the image sensor;
processing a certain frame, frame=framej of the succession of frames to evaluate its frame quality based on an incidence of edges and/or a sharpness of edges represented in the certain frame and determine if the certain frame satisfies a predetermined criteria;
while processing the certain frame, attempting to decode a previous frame, frame=framej−
k, where k≧
1; and
if the certain frame satisfies the predetermined criteria, ceasing the attempt to decode the previous frame.
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Abstract
There is described an indicia reading terminal that can be operative to capture a succession of frames of image data and that can be operative so that a certain frame of the succession of frames is subject to quality evaluation processing where a result of the quality evaluation processing is responsive to one or more of an incidence and sharpness of edge representations of the frame of image data.
330 Citations
20 Claims
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1. An indicia reader comprising:
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an image sensor for generating frames of image data; a processor in communication with the image sensor, the processor being configured for; capturing a succession of frames of image data with the image sensor; processing a certain frame, frame=framej of the succession of frames to evaluate its frame quality based on an incidence of edges and/or a sharpness of edges represented in the certain frame and determine if the certain frame satisfies a predetermined criteria; while processing the certain frame, attempting to decode a previous frame, frame=framej−
k, where k≧
1; andif the certain frame satisfies the predetermined criteria, ceasing the attempt to decode the previous frame. - View Dependent Claims (2, 3, 4, 5)
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6. An indicia reader comprising:
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an image sensor for generating frames of image data; a lens assembly for use in focusing light onto the image sensor; a memory for storing frames of image data generated by the image sensor; a processor in communication with the image sensor and the memory, the processor being configured for; capturing a succession of frames of image data with the image sensor, the frames being stored in the memory; processing a certain frame, frame=framej of the succession of frames to evaluate its frame quality based on an incidence of edges and/or a sharpness of edges represented in the certain frame and determine if the certain frame satisfies a first predetermined criteria; while processing the certain frame, attempting to decode a previous frame, frame=framej−
k, where k≧
1; andif the certain frame satisfies the first predetermined criteria, ceasing the attempt to decode the previous frame. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. An indicia reader comprising:
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an image sensor for generating frames of image data; a processor in communication with the image sensor, the processor being configured for; capturing a succession of frames of image data with the image sensor at a frame rate, wherein each frame is captured within a frame time; processing each of a plurality of frames from the succession of frames to evaluate its frame quality based on an incidence of edges and/or a sharpness of edges represented in the frame and determine if it satisfies a first predetermined criteria; for each of the plurality of frames, determining if a processing time for the processing to evaluate its frame quality exceeds the frame time; for each of the plurality of frames, if the processing time exceeds the frame time, ceasing the processing to evaluate its frame quality; and for each of the plurality of frames, if a certain frame satisfies the first predetermined criteria, ceasing an attempt to decode a previous frame relative to the certain frame of the succession of frames. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification