IMAGE READING DEVICE, IMAGE FORMING APPARATUS, CONTROL PROGRAM, AND CONTROL METHOD

• Main Authors: IGUCHI KAZUHIRO, NAKANISHI KENJI, IMOTO MASAHIRO, FUKUTOME SHOICHI, SUDO YASUHIRO, KURUMA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 22.12.2016
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CALCULATING; CINEMATOGRAPHY; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To provide an image reading device, image forming apparatus, control program, and control method with which: even when a document holding cover is not closed, shading correction can be properly performed by setting a correction value while preventing an influence of external light or reducing the influence of external light.SOLUTION: An image reading device 10 comprises a document holding cover 18 that covers a document placed on a document platen glass 14a, and an image reading part 26 that includes at least a line sensor 268. When an open/close sensor 164 detecting open/close of the document holding cover 18 detects that the cover is open, the image reading device determines whether an output from the image reading part 26 is abnormal before setting a shading correction value, and when determining that the output is abnormal, sets a shading correction value provided that a predetermined condition is satisfied.SELECTED DRAWING: Figure 1 【課題】原稿押さえカバーを閉じていなくても、外光の影響を受けずに又は外光の影響を低減して補正値を設定することで、シェーディング補正を適切に行うことができる画像読取装置、画像形成装置、制御プログラムおよび制御方法を提供する。【解決手段】画像読取装置１０は、原稿台ガラス１４ａに載置された原稿を覆う原稿押さえカバー１８と、少なくともラインセンサ２６８を備える画像読取部２６とを備える。原稿押さえカバー１８の開閉を検知する開閉センサ１６４が「開」を検知している場合には、シェーディング補正値を設定する前に画像読取部２６の出力が異常かどうかを判断し、異常であると判断した場合には、所定の条件を満たしていることを条件にシェーディング補正値を設定する。【選択図】図１