CPC H04N 1/00726 (2013.01) [H04N 1/00708 (2013.01); H04N 1/00734 (2013.01)] | 20 Claims |
1. An image abnormality detecting device comprising:
an image reader configured to,
read an image on a recording medium to obtain first read information, and
read a check pattern to obtain second read information, the check pattern including a first image abnormality;
an abnormality detector configured to,
perform a detection operation based on the first read information, the detection operation including detecting one or more image abnormalities, and
perform the detection operation based on the second read information;
a pattern holder having the check pattern, the pattern holder being within a reading area of the image reader; and
circuitry configured to inspect the detection operation of the abnormality detector based on the second read information,
wherein
the pattern holder is rotatable to move the check pattern in a conveyance direction of the recording medium while the image reader is reading the check pattern to obtain the second read information, or
the check pattern is a selected check pattern, the pattern holder having multiple faces, each of the multiple faces having a respective check pattern, the pattern holder being configured to switchably select a selected face among the multiple faces, the selected face having the selected check pattern, and the selected face being within a reading area of the image reader.
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