NOISE REDUCTION DEVICE, IMAGE PROCESSING DEVICE, IMAGING APPARATUS AND NOISE REDUCTION PROGRAM

PROBLEM TO BE SOLVED: To reduce noise in a flat part and a gradation part without performing complicated processing.SOLUTION: A noise reduction device comprises: first filtering processing means for producing first data by applying filtering processing to input data by a first smoothing filter; freq...

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Bibliographic Details
Main Author MURAMATSU MASARU
Format Patent
LanguageEnglish
Japanese
Published 16.02.2015
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Summary:PROBLEM TO BE SOLVED: To reduce noise in a flat part and a gradation part without performing complicated processing.SOLUTION: A noise reduction device comprises: first filtering processing means for producing first data by applying filtering processing to input data by a first smoothing filter; frequency separation means for producing second data formed from a low frequency component and third data formed from a high frequency component by separating the first data in accordance with frequencies; second filtering processing means for producing fourth data by applying filtering processing to the third data by a second smoothing filter; third filtering processing means for producing fifth data by applying filtering processing to the second data by a third smoothing filter; and addition means for producing sixth data by adding the fourth data and the fifth data. 【課題】複雑な処理を行うことなく、平坦部およびグラデーション部のノイズを低減すること。【解決手段】ノイズ低減装置は、入力データに対して第1平滑化フィルタによるフィルタリング処理を施して、第1データを生成する第1フィルタ処理手段と、第1データを周波数によって分離して、低周波成分からなる第2データと高周波成分からなる第3データとを生成する周波数分離手段と、第3データに対して第2平滑化フィルタによるフィルタリング処理を施して、第4データを生成する第2フィルタ処理手段と、第2データに対して第3平滑化フィルタによるフィルタリング処理を施して、第5データを生成する第3フィルタ処理手段と、第4データと第5データとを加算して、第6データを生成する加算手段と、を備える。【選択図】図2
Bibliography:Application Number: JP20130161239