PROBLEM TO BE SOLVED: To prevent deterioration of recognition performance due to focus deviation of a camera, without aiming, which requires a special device.SOLUTION: An image adjustment device of an on-vehicle camera causes: a correct image extraction unit 11 to extract a correct image for focus adjustment; a teacher data generation unit 12 to add, the correct image and edge frequency distribution of the correct image as teacher data, imaging information such as positional data, imaging time and weather condition at the time of imaging to the teacher data and register the information in a teacher database DB; an adjustment generation unit 13 to select a pick-up image of the same scene as the teacher data, and based on difference between a frequency characteristic of an edge component of the selected image and a frequency characteristic of an edge component of the teacher data, generate adjustment data for focus adjustment; and a focus adjustment unit 14 to perform image sharpness or blurring processing with the adjustment data, and correct focus deviation of a deteriorated image.SELECTED DRAWING: Figure 1
【課題】特殊な装置を要するエーミングを行うことなく、カメラのフォーカスずれによる認識性能の低下を回避する。【解決手段】正解画像抽出部11でフォーカス調整の正解画像を抽出し、教師データ生成部12で正解画像及びそのエッジ周波数分布を教師データとして、この教師データに、撮像時の位置データや撮像時刻、気象条件等の撮像情報を付加して教師データベースDBに登録する。そして、調整データ生成部13で教師データと同じシーンの撮像画像を選出し、選出した画像のエッジ成分の周波数特性と教師データのエッジ成分の周波数特性との差分に基づいて、フォーカス調整の調整データを生成する。フォーカス調整部14は、調整データを用いて画像鮮鋭化ないしはぼかし処理を行い、劣化画像のフォーカスずれを修正する。【選択図】図1
IMAGE ADJUSTMENT DEVICE OF ON-VEHICLE CAMERA
車載カメラの画像調整装置
2017-04-06
Patent
Electronic Resource
Japanese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |
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