최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0882025 (1997-06-25) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 265 인용 특허 : 13 |
A portable data collection device providing for dataform decoding and color imaging. An imaging assembly is provided that includes a board camera having black and white circuitry and generates a composite video signal representing an image of a target area of the imaging assembly when actuated. The
A portable data collection device providing for dataform decoding and color imaging. An imaging assembly is provided that includes a board camera having black and white circuitry and generates a composite video signal representing an image of a target area of the imaging assembly when actuated. The imaging assembly includes a two dimensional photosensor array overlaid by a color filter having a repeating pattern of four color filter elements. The imaging assembly is selectively actuatable with a first trigger for reading a target dataform in the imaging assembly's target area and actuatable with a second trigger for capturing a image of the target object in the target area. When the device is operated in the dataform reading mode, compensation circuitry is actuated to operate on digital gray scale values extracted from the composite video signal to adjust gray scale value magnitudes to compensate for the transmittivity differences of the color filter elements to improve decodability of the imaged dataform. When the device is operated in the imaging mode, conversion circuitry is actuated to convert the gray scale values to either Y-C or RGB digital data and a D/A converter further processes the Y-C or RGB digital data to provide an analog Y-C or RGB output signal.
[ I claim:] [1.] A portable data collection device comprising:a) a black and white modular camera assembly including a photosensor array having a two dimensional array of photosensors overlaid by a color filter, the color filter including a plurality of color filter elements each overlying at least
[ I claim:] [1.] A portable data collection device comprising:a) a black and white modular camera assembly including a photosensor array having a two dimensional array of photosensors overlaid by a color filter, the color filter including a plurality of color filter elements each overlying at least one photosensor, the plurality of color filter elements including a first set of filter elements having a first color and a second set of filter elements having a second color, a transmittivity of filter elements in the first set of filter elements being different than a transmittivity of the filter elements in photosensors being read out after an exposure period to generate an analog video signal representative of an image of a target area, the target area including a target dataform, the analog video signal including image signal portions wherein a magnitude of the signal represents respective charges accumulated on individual photo sensors of the array of photosensors during the exposure period;b) a modular camera assembly housing for supporting components of the modular camera assembly;c) an optic assembly including lens assembly supported within a shroud assembly and positioned to focus illumination reflected from the target area onto the array of photosensors, the optic assembly having a best focus position at a predetermined distance from an outwardly facing optic surface of an outermost lens which results in a clearest image of the target area being focused onto the array of photosensors;d) an illumination assembly supported within the housing and directing illumination towards the target area and including a lens array having a plurality of optic surfaces for directing illumination generated by illumination sources toward an illumination area substantially congruent with the target area;e) analog to digital conversion circuitry for converting the image signal portions of the analog video signal into a set of gray scale values, a magnitude of a given gray scale value proportional to an intensity of illumination incident on a given photosensor of the array of photosensors during the exposure period, the intensity of illumination incident on the given photosensor dependent upon a transmittivity of the color filter element overlying the given photosensor;f) compensation circuitry for generating a set of adjusted gray scale value magnitudes by adjusting magnitudes of selected gray scale values of the set of gray scale values, the magnitudes of the selected gray scale values being adjusted to compensate for differences in intensity of illumination incident on a subset of photosensors of the photosensor array corresponding to the selected gray scale values during the exposure period, the differences in intensity of illumination being due to differences in transmittivity of different colored color filter elements overlying different photosensors of the subset of photosensors; andg) image processing and decoding circuitry receiving as input the set of adjusted gray scale value magnitudes and decoding a portion of the imaged target area representing the target dataform.
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