IMAGING APPARATUS

• Main Authors: TAKEMURA KAZUHIKO, NISHIZAWA AKIHITO, YOSHIDA DAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 18.04.2019
• 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; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

To provide an imaging apparatus that has good reproducibility even at such a brightness that the signal level of an imaging device is saturated.SOLUTION: The imaging apparatus comprises: an imaging device 1 having a filter separating light into visible light and near infrared light; an exposure control part 103 that sets first and second exposure conditions and controls an imaging part; a signal ratio detection part 102 that detects the ratio of the exposure times of the first and second exposure conditions; first and second visible/near infrared demosaicing parts 3A and 3B that generate visible light and near infrared light under the first and second exposure conditions; a near infrared demosaicing part 4 that generates near infrared light under the first exposure condition; an amplification part 8 that amplifies a signal of the second visible/near infrared demosaicing part; a saturation region detection part 100 that detects saturation of the first visible/near infrared demosaicing part; a selection part 101 that selects the signal of the amplification part when saturated, and the signal of the first visible/near infrared demosaicing part when not saturated; and a subtraction part 10 that subtracts the signal of the near infrared demosaicing part from the signal of the selection part.SELECTED DRAWING: Figure 1 【課題】撮像素子の信号レベルが飽和する明るさに於いても良好な再現性を有する撮像装置を提供する。【解決手段】可視光と近赤外光に分離するフィルタを有する撮像素子１と、第１、第２露光条件を設定し、撮像部を制御する露光制御部１０３と、第１、第２露光条件の露光時間の比を検出する信号比検出部１０２と、第１、第２露光条件で可視光と近赤外光を生成する第１、第２可視／近赤外デモザイキング部３Ａ，３Ｂと、第１露光条件で近赤外光を生成する近赤外デモザイキング部４と、第２可視／近赤外デモザイキング部の信号を増幅する増幅部８と、第１可視／近赤外デモザイキング部の飽和を検出する飽和領域検出部１００と、飽和する場合は増幅部の信号、飽和しない場合は第１可視／近赤外デモザイキング部の信号を選択する選択部１０１と、選択部の信号から近赤外デモザイキング部の信号を減算する減算部１０とを備える。【選択図】 図１