Code reader and method for reading optical codes
AssigneeSick AG
InventorsRomain Müller, Florian Schneider, Richard Nopper
Life of this patent
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Abstract
A code reader for reading an optical code is provided that has a linear image sensor having a plurality of linear arrangements of light reception pixels for recording image data having the code and a control and evaluation unit that is configured to locate and read the code in the image data, wherein the light reception pixels have a different spectral sensitivity. Here, at least one linear arrangement is a white line whose reception pixels are sensitive to white light for recording a gray scale image and the other linear arrangements are color lines whose reception pixels are sensitive to light of only one respective color for recording a color image.
Claims19
A code reader for reading an optical code, the code reader comprising:
- a linear image sensor having a plurality of linear arrangements of light reception pixels for recording image data having the code;
- and
- a control and evaluation unit that is configured to locate and read the code in the image data, wherein the light reception pixels have a different spectral sensitivity,
- wherein at least one linear arrangement is a white line whose reception pixels are sensitive to white light for recording a gray scale image,
- wherein the other linear arrangements are color lines whose reception pixels are sensitive to light of only one respective color for recording a color image,
- and wherein the color lines have light reception pixels that are sensitive to a respective one of two primary colors and no light reception pixels that are sensitive to the third primary color.
A method of reading an optical code in which image data having the code having a plurality of linear arrangements are recorded linewise by light reception pixels and the code is located and read in the image data, with the light reception pixels detecting image data in different spectral ranges,
- wherein an image line is respectively recorded with at least one white line and at least one color line, with a white line being a linear arrangement whose light reception pixels record white light, and with a color line being a linear arrangement whose light reception pixels record light of only one respective color,
- and wherein the color line has light reception pixels that are sensitive to a respective one of two primary colors and no light reception pixels that are sensitive to the third primary color.
A code reader for reading an optical code, the code reader comprising:
- a linear image sensor having a plurality of linear arrangements of light reception pixels for recording image data having the code;
- and
- a control and evaluation unit that is configured to locate and read the code in the image data, wherein the light reception pixels have a different spectral sensitivity,
- wherein at least one linear arrangement is a white line whose reception pixels are sensitive to white light for recording a gray scale image,
- wherein the other linear arrangements are color lines whose reception pixels are sensitive to light of only one respective color for recording a color image,
- and wherein the weighting is set by different amplification factors of the linear arrangements and/or by post-processing.
Dependencies are inferred from the claim text.