IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING PROGRAM

• Main Authors: MITSUNOBU TAKUYA, YAMAGUCHI JUN
• Format: Patent
• Language: English; Japanese
• Published: 08.10.2020
• Subjects: ACCESSORIES THEREFOR; ALARM SYSTEMS; 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; ORDER TELEGRAPHS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SIGNALLING; SIGNALLING OR CALLING SYSTEMS

To determine a visual field disturbance with high precision even when a photography part is irradiated with a laser pointer.SOLUTION: An image processing apparatus 22 comprises: light source region extraction means 60 which extracts an RGB light source region consisting of pixels of a low exposure image 42, at least one of R, G and B components of each of the pixels getting saturated; and visual field disturbance determination means 62 which compares, when an RGB light source region is extracted, an object image region, other than regions corresponding to the RGB light source region extracted from a low-exposure image 42 photographed simultaneously with a normal exposure image 40, of the normal exposure image 40, and a reference image region, other than regions corresponding to the RGB light source region extracted from the low-exposure image 42 photographed simultaneously with a reference image 44 photographed with first exposure in the past, of the reference image 44, and then determines, when the number of edges of the object image region is larger than that of the reference image region by a first edge determination reference value 52a or more, that a visual field of a photography part 32 is disturbed.SELECTED DRAWING: Figure 2 【課題】撮影部に対してレーザポインタを照射された場合であっても高い精度で視野妨害と判定することを可能にする。【解決手段】低露光画像４２の各画素のＲＧＢ成分の値のうちいずれか一つの成分のみ飽和している画素からなるＲＧＢ光源領域する光源領域抽出手段６０と、ＲＧＢ光源領域が抽出された場合、通常露光画像４０における当該通常露光画像４０と同時期に撮影された低露光画像４２から抽出されたＲＧＢ光源領域に対応する領域以外の対象画像領域と、過去に第１露光量で撮影された基準画像４４における当該基準画像４４と同時期に撮影された低露光画像４２から抽出されたＲＧＢ光源領域に対応する領域以外の基準画像領域と、を比較し、当該基準画像領域よりも当該対象画像領域のエッジ数が第１エッジ判定基準値５２ａ以上減少している場合、撮影部３２の視野が妨害されたと判定する視野妨害判定手段６２と、を備える画像処理装置２２とする。【選択図】図２