DIGITAL HOLOGRAM SIGNAL PROCESSING DEVICE AND DIGITAL HOLOGRAM IMAGING AND REPRODUCING DEVICE

• Main Authors: ISHII NORIHIKO, MUROI TETSUHIKO, GOTO MASAHIDE, NOBUKAWA TERUKICHI, KATANO YUTARO
• Format: Patent
• Language: English; Japanese
• Published: 20.10.2022
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHIC PROCESSES OR APPARATUS; HOLOGRAPHY; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHOTOGRAPHY; PHYSICS; TESTING

To correctly obtain a feeling of depth such as the depth position, depth order, etc., of a subject and to compose an image of the subject together with an image picked up with a normal camera.SOLUTION: A digital hologram signal processing device comprises: in-focus/depth position information acquisition means 18A which acquires an in-focus image of a subject and depth position information on the in-focus image from a recomposed image of a digital hologram; reference image acquisition means 18B which adds respective obtained in-focus images to acquire a reference image B through computation for specifying an in-region in-focus image set at a desired depth position in a depth-of-field region; defocus image group acquisition means 18C which acquires a defocus image group Dd through computation for specifying an out-region in-focus image arranged at the desired depth position outside the depth-of-field region; and reference image/defocus image group addition means 18D which adds the obtained reference image B and the obtained defocus image group Dd to each other to obtain an incoherent response image.SELECTED DRAWING: Figure 4 【課題】 被写体の奥行位置や奥行順序等の奥行感覚を正しく得ることを可能とし、通常のカメラで撮像した映像と合成することを可能とする。【解決手段】 ディジタルホログラムの再構成像から、被写体の合焦像と、該合焦像の奥行位置情報を取得する合焦像／奥行位置情報取得手段１８Ａと、被写界深度の領域内の、所望の奥行位置に設定される領域内合焦像を指定し得るように演算し、得られた各合焦像を加算して基準画像Ｂを取得する基準画像取得手段１８Ｂと、被写界深度の領域外の、所望の奥行位置に配される領域外合焦像を指定し得るように演算してデフォーカス画像群Ｄｄを得るデフォーカス画像群取得手段１８Ｃと、得られた基準画像Ｂと、得られたデフォーカス画像群Ｄｄと、を互いに加算して、インコヒーレント応答画像を得る基準画像／デフォーカス画像群加算手段１８Ｄと、を備える。【選択図】図４