IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD

• Main Authors: TAKAHASHI AKIHIDE, KIMURA MITSUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 27.05.2021
• Subjects: ADVERTISING; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; AUXILIARY DRIVES FOR VEHICLES; CALCULATING; COMPUTING; COUNTING; CRYPTOGRAPHY; DISPLAY; EDUCATION; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; PERFORMING OPERATIONS; PHYSICS; SEALS; TRANSPORTING; VEHICLES IN GENERAL

To provide an image processing device which generates a high quality image with excellent visibility.SOLUTION: An image processing device acquires the feature amount (the maximum value, minimum value, average value, histogram or the like of the luminance value) of a global area (GA) of an image and the feature amount of each local area (LA) of the image from an input image, and calculates a plurality of modulation gain values (gamma correction curve) with respect to GA and each LA. Further, the image processing device determines the correction intensity for each LA from the feature amount of GA and the feature amount of each LA, and creates the LA correction intensity map. Finally, the image processing device applies the result of combining the plurality of modulation gain values to the input image based on the LA correction intensity map.SELECTED DRAWING: Figure 1 【課題】視認性がよい高画質な画像を生成する画像処理装置を提供することである。【解決手段】画像処理装置は、入力画像から画像の全体領域（ＧＡ）の特徴量（輝度値の最大値、最小値、平均値、ヒストグラムなど）及び画像の各ローカルエリア（ＬＡ）の特徴量を取得し、ＧＡ及び各ＬＡに対する複数の変調ゲイン値（ガンマ補正カーブ）を算出する。さらに、画像処理装置は、ＧＡの特徴量及び各ＬＡの特徴量から、ＬＡ毎に補正強度を決定し、ＬＡ補正強度マップを作成する。最後に、画像処理装置は、ＬＡ補正強度マップに基づいて複数の変調ゲイン値を合成した結果を最終的に入力画像に適用する。【選択図】図１