Recording-material type determination apparatus and method and image forming apparatus
First Claim
1. A recording-material type determination apparatus comprising:
- a light emit unit, adapted to illuminate a surface of recording material;
a read unit, adapted to read an illuminated region on the surface of the recording material as a video image;
a first calculation part adapted to calculate information about depth of irregularities in the surface of the recording material based on video information read by the read unit;
a second calculation part adapted to calculate information about spacing of irregularities on the surface of the recording material based on the video information read by the read unit; and
a determination part adapted to determine a type of recording material based on calculation results produced by the first calculation part and the second calculation part.
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Abstract
To provide a recording-material type determination apparatus and recording-material type determination method which can determine the type of recording material using simple calculations as well as to provide an image forming apparatus capable of obtaining stable image quality independent of the type of recording material using the apparatus and method.
Based on data read by a read unit which reads surface images of recording material, a first calculation unit calculates the depth of irregularities in the surface of recording material and stores the results of calculation in a register A while a second calculation unit calculates the spacing of irregularities on the surface of the recording material and stores the results of calculation in a register B. Based on the values in the registers A and B, the type of recording material such as gloss paper, plain paper, rough paper or OHT is determined.
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Citations
41 Claims
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1. A recording-material type determination apparatus comprising:
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a light emit unit, adapted to illuminate a surface of recording material; a read unit, adapted to read an illuminated region on the surface of the recording material as a video image; a first calculation part adapted to calculate information about depth of irregularities in the surface of the recording material based on video information read by the read unit; a second calculation part adapted to calculate information about spacing of irregularities on the surface of the recording material based on the video information read by the read unit; and a determination part adapted to determine a type of recording material based on calculation results produced by the first calculation part and the second calculation part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A recording-material type determination apparatus comprising:
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an input part adapted to input a video image of a surface of recording material; a first calculation part adapted to calculate information about depth of irregularities in a surface of the recording material based on video information inputted in the input unit; a second calculation part adapted to calculate information about spacing of irregularities on the surface of the recording material based on the video information inputted in the input unit; and a determination part adapted to determine a type of recording material based on calculation results produced by the first calculation part and the second calculation part.
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13. A recording-material type determination method comprising:
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a read step of reading a surface of recording material as a video image; a first calculation step of calculating information about depth of irregularities in the surface of the recording material based on results of the read step; a second calculation step of calculating information about spacing of irregularities on the surface of the recording material based on the results of the read step; and a determination step of determining a type of recording material based on calculation results produced in the first calculation step and the second calculation step. - View Dependent Claims (14)
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15. An image forming apparatus comprising:
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a conveying part adapted to convey recording material; an image forming part which forms an image on the recording material conveyed by the conveyor; a light emit unit, adapted to illuminate a surface of recording material; a read unit, adapted to read an illuminated region on the surface of the recording material as a video image; a first calculation part adapted to calculate information about depth of irregularities in the surface of the recording material based on video information read by the read unit; a second calculation part adapted to calculate information about spacing of irregularities on the surface of the recording material based on the video information read by the read unit; a determination part adapted to determine a type of recording material based on calculation results produced by the first calculation part and the second calculation part; and a control part which controls image forming conditions of the image forming part based on the type of recording material determined by the determination part. - View Dependent Claims (16, 17, 18)
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19. A recording material type determination apparatus comprising:
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a sensor configured to read a surface image of a recording material, the surface image having pixels; a calculation part configured to calculate difference information about irregularities in the surface of the recording material, wherein the calculation part generates a brightness difference between a bright portion and a dark portion in a pixel line of the surface image, and the difference information is obtained by using the brightness differences of plural pixel lines; and a determination part configured to determine a type of the recording material based on the calculated difference information. - View Dependent Claims (20, 21)
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22. An image forming apparatus comprising:
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an image forming part configured to form an image on a recording material; a sensor configured to read a surface image of a recording material, the surface image having pixels; a calculation part configured to calculate difference information about irregularities in the surface of the recording material, wherein the calculation part generates a brightness difference between a bright portion and a dark portion in a pixel line of the surface image, and the difference information is obtained by using the brightness differences of plural pixel lines; and a controller configured to control an image forming condition of the image forming part based on the calculated difference information about a depth of irregularities in the surface of the recording material. - View Dependent Claims (23, 24, 25)
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26. A recording material type determination method comprising:
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a read step of reading a surface image of a recording material, the surface image having pixels; a calculation step of calculating difference information about irregularities in the surface of the recording material, wherein the calculation step includes a step of generating a brightness difference between a bright portion and a dark portion in a pixel line of the surface image and a step of using the brightness differences of plural pixel lines so that the difference information is obtained; and a determination step of determining a type of the recording material based on the calculated difference information calculated in the calculation step. - View Dependent Claims (27)
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28. A recording material type determination apparatus comprising:
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a sensor configured to read a surface image of a recording material, the surface image having pixels; a calculation part configured to calculate difference information about irregularities in the surface of the recording material, wherein the calculation part generates a brightness difference between a bright portion and a dark portion in a pixel line of the surface image, and the difference information is obtained by summing the brightness differences of plural pixel lines; and a determination part configured to determine a type of the recording material based on the calculated difference information. - View Dependent Claims (29)
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30. An image forming apparatus comprising:
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an image forming part configured to form an image on a recording material; a sensor configured to read a surface image of the recording material, the surface image having pixels; a calculation part configured to calculate difference information about irregularities in the surface of the recording material, wherein the calculation part generates a brightness difference between a bright portion and a dark portion in a pixel line of the surface image, and the difference information is obtained by summing the brightness differences of plural pixel lines; and a controller configured to control an image forming condition of the image forming part based on the calculated information. - View Dependent Claims (31, 32)
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33. A recording material type determination method comprising:
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a read step of reading a surface image of a recording material, the surface image having pixels; a calculation step of calculating difference information about irregularities in the surface of the recording material, wherein the calculation step includes a step of generating a brightness difference between a brightest portion and a darkest portion in a pixel line of the surface image and a step of summing the brightness differences of plural pixel lines so that the difference information is obtained; and a determination step of determining a type of the recording material based on the difference information calculated by the calculation step.
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34. A recording material type determination apparatus for determining a surface condition of a recording material, comprising:
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a sensor configured to read a surface image of the recording material, the surface image having pixels; a calculation part configured to calculate information about a depth of irregularities in the surface of the recording material, wherein the calculation part generates a brightness difference between a brightest portion and a darkest portion in each pixel line among plural pixel lines of the surface image and the information is obtained by summing the brightness differences of the plural pixel lines; and a determination part configured to determine a type of the recording material based on the calculated difference information. - View Dependent Claims (35)
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36. An image forming apparatus comprising:
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an image forming part configured to form an image on a recording material; a sensor configured to read a surface image of the recording material, the surface image having pixels; a calculation part configured to calculate information about a depth of irregularities in the surface of the recording material, wherein the calculation part generates brightness differences between a brightest portion and a darkest portion in each pixel line among plural pixel lines of the surface image and the information is obtained by summing the brightness differences of the plural pixel lines; and a controller configured to control an image forming condition of the image forming part based on the calculated difference information. - View Dependent Claims (37, 38)
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39. A recording material surface condition detection apparatus for determining a surface condition of a recording material, comprising:
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a sensor configured to read a surface image of the recording material, the surface image having pixels; a calculation part configured to calculate information about a depth of irregularities in the surface of the recording material, the calculation part generates brightness differences between a brightest portion and a darkest portion in each pixel line among plural pixel lines of the surface image and the information is obtained by summing the brightness differences of the plural pixel lines; and a detection part configured to detect a condition of the surface of the recording material based on the information calculated by the calculation part. - View Dependent Claims (40, 41)
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Specification