公开(公告)号：US11488295B2

公开(公告)日：2022-11-01

申请号：US16898848

申请日：2020-06-11

Applicant: Konica Minolta, Inc.

Inventor： Natsuko Minegishi ,  Yoshiki Nakane ,  Takenobu Kimura ,  Hiroshi Morimoto ,  Kei Okamura ,  Takashi Akazawa

IPC: G06T7/00 ,  G03G15/00 ,  G03G15/08

Abstract: An evaluation device evaluates an image clarity of a print image. The evaluation device includes: an object that is projected onto a measurement surface of a recording medium; an illuminator that makes the object projected onto the measurement surface; an imager that images the measurement surface on which the object has been projected to obtain image data; and a hardware processor that, based on a distribution of parameters related to a brightness of the image data, quantifies a degree of the image clarity into a numerical value and defines the numerical value as an evaluation value of the image clarity.

公开(公告)号：US10198663B2

公开(公告)日：2019-02-05

申请号：US15376907

申请日：2016-12-13

Applicant: Konica Minolta, Inc.

Inventor： Natsuko Kawai ,  Takashi Akazawa ,  Tetsuya Ishikawa ,  Ryoei Ikari ,  Kei Okamura ,  Keiji Uchikawa

IPC: G06K9/62 ,  G06T7/143 ,  G06T7/11 ,  G06T7/168 ,  G06K9/46 ,  G06K9/52 ,  G06T7/00 ,  G06T7/42 ,  G06T7/44

Abstract: A system for predicting occurrence of a defective image includes: an input device configured to input image data into an image forming apparatus; and a hardware processor configured to analyze a spatial frequency of gradient distribution of an image in accordance with a size of a density irregularity specific to the image forming apparatus with respect to the input image data and to calculate a probability of a conspicuous density irregularity of the size in regard to the image formed by the image forming apparatus based on the image data with reference to an index of correlation between an analysis result and an evaluation value of the density irregularity.