Title:
SHEET TYPE DETERMINATION DEVICE, IMAGE FORMING APPARATUS, AND SHEET TYPE DETERMINATION METHOD
Document Type and Number:
Japanese Patent JP2017181060
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To appropriately determine the type of sheet equally for a preprint sheet.SOLUTION: Light radiated to a recording material and reflected on the recording material is photographed by an image sensor 43, and the light intensity for each of pixels is acquired. A differential integrated value A is calculated from a pixel group corresponding to a detection area on the basis of the light intensity of the pixels in the pixel group after pixels having a light intensity less than a threshold are removed. A surface state of the recording material is determined from the differential integrated value A.SELECTED DRAWING: Figure 8
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Inventors:
ONO KAZURO
Application Number:
JP2016063504A
Publication Date:
October 05, 2017
Filing Date:
March 28, 2016
Export Citation:
Assignee:
CANON KK
International Classes:
G01N21/47; G01N29/11; G01N29/48; G03G15/00
Attorney, Agent or Firm:
Another role Shigehisa