Optical information reading device
First Claim
1. An optical information reading device which includesan imaging part provided with an imaging element which takes an image of a code attached to a workpiece,a conversion part generating a second image by converting from a pixel value of a first image obtained by the imaging part to a pixel value in response to a predetermined conversion characteristic, anda decoding part decoding a code included in the second image generated by the conversion part,the optical information reading device comprising:
- a conversion characteristic storage part storing a plurality of different conversion characteristics used as the predetermined conversion characteristic at a time of conversion of the pixel value in the conversion part;
a processing part controlling the conversion part to generate a plurality of second images in response to each of the plurality of different conversion characteristics stored in the conversion characteristic storage part by using the first image obtained by the imaging part at a time of setting of the optical information reading device before operation of the optical information reading device, and to select one of the plurality of different conversion characteristics by analyzing a result in which the code included in each of the plurality of generated second images is decoded by the decoding part; and
a parameter setting storage part storing setting information including a parameter which constitutes the conversion characteristic selected by the processing part,wherein the conversion part generates a new second image in response to the conversion characteristic corresponding to the parameter stored in the parameter setting storage part by using a new first image obtained by the imaging part at a time of the operation of the optical information reading device, andthe decoding part decodes a code included in the new second image generated by the conversion part.
1 Assignment
0 Petitions
Accused Products
Abstract
[Object] To enhance a reading accuracy of a code even when a light amount, which can be received by an imaging element, varies greatly. [Means to solve the problems] A plurality of second images in response to a plurality of different conversion characteristics is generated by using the first image obtained at the time of setting of an optical information reading device. The results, in which codes included in the generated second images are respectively decoded by a decoding part, are analyzed, and one of the conversion characteristics is selected. The second image in response to the selected conversion characteristic is generated by using the first image at the time of operation of the optical information reading device.
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Citations
9 Claims
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1. An optical information reading device which includes
an imaging part provided with an imaging element which takes an image of a code attached to a workpiece, a conversion part generating a second image by converting from a pixel value of a first image obtained by the imaging part to a pixel value in response to a predetermined conversion characteristic, and a decoding part decoding a code included in the second image generated by the conversion part, the optical information reading device comprising: -
a conversion characteristic storage part storing a plurality of different conversion characteristics used as the predetermined conversion characteristic at a time of conversion of the pixel value in the conversion part; a processing part controlling the conversion part to generate a plurality of second images in response to each of the plurality of different conversion characteristics stored in the conversion characteristic storage part by using the first image obtained by the imaging part at a time of setting of the optical information reading device before operation of the optical information reading device, and to select one of the plurality of different conversion characteristics by analyzing a result in which the code included in each of the plurality of generated second images is decoded by the decoding part; and a parameter setting storage part storing setting information including a parameter which constitutes the conversion characteristic selected by the processing part, wherein the conversion part generates a new second image in response to the conversion characteristic corresponding to the parameter stored in the parameter setting storage part by using a new first image obtained by the imaging part at a time of the operation of the optical information reading device, and the decoding part decodes a code included in the new second image generated by the conversion part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification