Device and system for processing image data representing bar codes
First Claim
1. A device for verification of a bar code disposed on a substrate, said device comprising:
- (A) an imaging assembly including a solid state image sensor;
(B) a hand held housing encapsulating a component of said imaging assembly, said hand held housing defining a front surface, a rear surface and side surfaces of said device, wherein walls of said hand held housing extend upward from said substrate when said device is positioned in a position to measure print quality of said bar code;
(C) an illumination assembly at least partially disposed in said housing projecting an illumination pattern onto said substrate;
(D) a window disposed at a front surface of said device, said window being light transmissive to enable an operator to view said bar code when said device is positioned in a position over said bar code;
(E) a trigger disposed on said device, wherein said housing and said trigger are configured in a complementary manner so that an operator grasping said device in a grasping position can actuate said trigger with a digit of a hand that is grasping said device without releasing said device from said hand;
(F) an image capture module incorporated in said device;
(G) a bar code decoding module further incorporated in said device;
(H) a bar code print quality measurement module incorporated in said device;
(I) an interpolation module disposed in said device; and
(J) a high spatial frequency correction module incorporated in said device;
wherein said device is configured so that when said trigger is actuated, said device automatically executes said image capture module, said bar code decoding module and said bar code print quality measurement module, wherein said device when executing said image capture module captures a frame of image data corresponding to said bar code symbol, wherein said device when executing said bar code decoding module processes a frame of image data to determine a decoded out message, and wherein said device when executing said print quality measurement module determines at least one of a print contrast measurement, an edge contrast measurement and a modulation measurement of said bar code symbol; and
wherein said device is further configured so that when said trigger is activated, said reader automatically executes each of said interpolation module and said high spatial frequency error correction module.
1 Assignment
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Accused Products
Abstract
A device for processing image data relating to bar codes is described. In one embodiment a bar code verification device is provided having an ergonomic form factor characterized by a domed hand held trigger and a viewing window. The verification device may be disposed in a network that includes a host processor system and other bar code reading devices which may include other bar code verification devices. Processing circuitry for processing image signals corresponding to printed bar codes may be partially disposed within the hand held verification device and partially disposed within a host processor system spaced apart from and associated with the hand held verification device. The hand held verification device may be in wireless communication with the host processor system to which it is associated. The bar code verification system may include signal enhancement modules which interpolate constructed pixel values from actual pixel values and which correct for signal degradation resulting from high frequency spatial sampling.
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Citations
11 Claims
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1. A device for verification of a bar code disposed on a substrate, said device comprising:
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(A) an imaging assembly including a solid state image sensor; (B) a hand held housing encapsulating a component of said imaging assembly, said hand held housing defining a front surface, a rear surface and side surfaces of said device, wherein walls of said hand held housing extend upward from said substrate when said device is positioned in a position to measure print quality of said bar code; (C) an illumination assembly at least partially disposed in said housing projecting an illumination pattern onto said substrate; (D) a window disposed at a front surface of said device, said window being light transmissive to enable an operator to view said bar code when said device is positioned in a position over said bar code; (E) a trigger disposed on said device, wherein said housing and said trigger are configured in a complementary manner so that an operator grasping said device in a grasping position can actuate said trigger with a digit of a hand that is grasping said device without releasing said device from said hand; (F) an image capture module incorporated in said device; (G) a bar code decoding module further incorporated in said device; (H) a bar code print quality measurement module incorporated in said device; (I) an interpolation module disposed in said device; and (J) a high spatial frequency correction module incorporated in said device; wherein said device is configured so that when said trigger is actuated, said device automatically executes said image capture module, said bar code decoding module and said bar code print quality measurement module, wherein said device when executing said image capture module captures a frame of image data corresponding to said bar code symbol, wherein said device when executing said bar code decoding module processes a frame of image data to determine a decoded out message, and wherein said device when executing said print quality measurement module determines at least one of a print contrast measurement, an edge contrast measurement and a modulation measurement of said bar code symbol; and wherein said device is further configured so that when said trigger is activated, said reader automatically executes each of said interpolation module and said high spatial frequency error correction module. - View Dependent Claims (2, 3, 4, 5)
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6. A portable data collection device for use in decoding and measuring print quality of a bar code symbol disposed on a substrate, said portable data collection device comprising:
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an imaging assembly including a solid state image sensor and an imaging lens focusing an image onto an active surface of said solid state image sensor, said solid state image sensor being selected from the group consisting of;
a one dimensional image sensor having at least one row of photosensitive picture elements and a two dimensional image sensor having a plurality of rows and a plurality of columns of photosensitive picture elements, said sensor configured to output a scan reflectance waveform representative of said bar code symbol;a hand held housing encapsulating a component of said imaging assembly, said hand held housing defining a front surface, a rear surface, and side surfaces of said device, wherein walls of said hand held housing extend upward from said substrate when said device is positioned in a position to measure print quality of said bar code; a trigger button disposed on said housing; a display disposed on said housing; an image capture module configured to capture at least one frame of image data corresponding to a bar code symbol; a bar code decoding module configured to process said at least one frame of image data to determine a decoded out message; and a bar code quality measurement module configured to determine at least one of;
a value of contrast of said bar code symbol, a value of edge contrast of said bar code symbol, a value of modulation of said bar code symbol;wherein said data collection device is configured, responsive to detecting that said trigger has been actuated, to automatically execute said image capture module, said bar code decoding module, and said bar code print quality measurement module. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification