JP2022051097A5

JP2022051097A5 - Image processing device, image processing method and program

Info

Publication number: JP2022051097A5
Application number: JP2020157372A
Authority: JP
Filing date: 2020-09-18
Publication date: 2023-08-15

Description

本発明は、画像処理装置、画像処理方法及びプログラムに関する。 The present invention relates to an image processing device, an image processing method , and a program.

以上のような実情を踏まえ、本発明の一側面に係る目的は、階調補正とノイズリダクション処理を良好に実現することができる画像処理装置、画像処理方法及びプログラムを提供することである。 In view of the circumstances as described above, it is an object of one aspect of the present invention to provide an image processing apparatus, an image processing method , and a program that can satisfactorily implement gradation correction and noise reduction processing.

本発明に係る画像処理装置は、所定のＲＧＢ画像データに対して階調補正することにより階調補正画像データを生成する階調補正部と、前記階調補正画像データをＹＵＶ変換することによりＹＵＶ画像データを生成するＹＵＶ変換部と、複数の入力データとして、少なくとも、前記階調補正部が前記階調補正画像データを生成するときの前記ＲＧＢ画像データに対する階調補正量に対応させたゲインマップデータと、前記ＹＵＶ画像データにおける輝度データと、前記ＹＵＶ画像データが示す色と所定の色との間の尤度を示す尤度データと、所定の外部マップデータと、を入力可能に設定され、前記複数の入力データのなかでの所定の組み合わせによってノイズリダクション強度データを生成するノイズリダクション強度データ生成部と、前記ＹＵＶ画像データに対するノイズリダクション処理を、前記ノイズリダクション強度データを適用して行うノイズリダクション処理部と、を有することを特徴とする。An image processing apparatus according to the present invention includes a tone correction unit that generates tone-corrected image data by performing tone correction on predetermined RGB image data, and a YUV image data by YUV-converting the tone-corrected image data. a YUV conversion unit for generating image data; and a gain map corresponding to at least a gradation correction amount for the RGB image data when the gradation correction unit generates the gradation-corrected image data, as a plurality of input data. data, luminance data in the YUV image data, likelihood data indicating the likelihood between the color indicated by the YUV image data and a predetermined color, and predetermined external map data, a noise reduction intensity data generating unit that generates noise reduction intensity data according to a predetermined combination of the plurality of input data; and a noise reduction that performs noise reduction processing on the YUV image data by applying the noise reduction intensity data. and a processing unit.
また、本発明に係る画像処理方法は、所定のＲＧＢ画像データに対して階調補正することにより階調補正画像データを生成する階調補正ステップと、前記階調補正画像データをＹＵＶ変換することによりＹＵＶ画像データを生成するＹＵＶ変換ステップと、複数の入力データとして、少なくとも、前記階調補正ステップで前記階調補正画像データを生成するときの前記ＲＧＢ画像データに対する階調補正量に対応させたゲインマップデータと、前記ＹＵＶ画像データにおける輝度データと、前記ＹＵＶ画像データが示す色と所定の色との間の尤度を示す尤度データと、所定の外部マップデータと、を入力可能に設定され、前記複数の入力データのなかでの所定の組み合わせによってノイズリダクション強度データを生成するノイズリダクション強度データ生成ステップと、前記ＹＵＶ画像データに対するノイズリダクション処理を、前記ノイズリダクション強度データを適用して行うノイズリダクション処理ステップと、を有することを特徴とする。Further, an image processing method according to the present invention comprises a gradation correction step of generating gradation-corrected image data by performing gradation correction on predetermined RGB image data, and YUV-converting the gradation-corrected image data. and a plurality of input data corresponding to at least the tone correction amount for the RGB image data when generating the tone-corrected image data in the tone correction step. Gain map data, luminance data in the YUV image data, likelihood data indicating the likelihood between the color indicated by the YUV image data and a predetermined color, and predetermined external map data can be input. a noise reduction intensity data generation step of generating noise reduction intensity data according to a predetermined combination of the plurality of input data; and performing noise reduction processing on the YUV image data by applying the noise reduction intensity data. and a noise reduction processing step.
また、本発明に係るプログラムは、コンピュータを、所定のＲＧＢ画像データに対して階調補正することにより階調補正画像データを生成する階調補正手段、前記階調補正画像データをＹＵＶ変換することによりＹＵＶ画像データを生成するＹＵＶ変換手段、複数の入力データとして、少なくとも、前記階調補正手段が前記階調補正画像データを生成するときの前記ＲＧＢ画像データに対する階調補正量に対応させたゲインマップデータと、前記ＹＵＶ画像データにおける輝度データと、前記ＹＵＶ画像データが示す色と所定の色との間の尤度を示す尤度データと、所定の外部マップデータと、を入力可能に設定され、前記複数の入力データのなかでの所定の組み合わせによってノイズリダクション強度データを生成するノイズリダクション強度データ生成手段、前記ＹＵＶ画像データに対するノイズリダクション処理を、前記ノイズリダクション強度データを適用して行うノイズリダクション処理手段、として機能させることを特徴とする。Further, the program according to the present invention provides a computer with tone correction means for generating tone-corrected image data by tone-correcting predetermined RGB image data, and YUV-converting the tone-corrected image data. YUV conversion means for generating YUV image data by means of a plurality of input data, at least a gain corresponding to a tone correction amount for the RGB image data when the tone correction means generates the tone-corrected image data Map data, brightness data in the YUV image data, likelihood data indicating the likelihood between the color indicated by the YUV image data and a predetermined color, and predetermined external map data are set to be inputtable. a noise reduction intensity data generating means for generating noise reduction intensity data from a predetermined combination of the plurality of input data; It is characterized by functioning as processing means.

本発明によれば、階調補正とノイズリダクション処理を良好に実現することができる画像処理装置、画像処理方法及びプログラムを提供することができる。 According to the present invention , it is possible to provide an image processing apparatus, an image processing method, and a program that can satisfactorily implement gradation correction and noise reduction processing.

Claims

a tone correction unit that generates tone-corrected image data by tone-correcting predetermined RGB image data;
a YUV conversion unit for generating YUV image data by YUV converting the gradation-corrected image data;
As the plurality of input data, at least gain map data corresponding to the gradation correction amount for the RGB image data when the gradation correction unit generates the gradation correction image data, and luminance data in the YUV image data. , likelihood data indicating the likelihood between the color indicated by the YUV image data and a predetermined color, and predetermined external map data. a noise reduction intensity data generation unit that generates noise reduction intensity data by a combination of
a noise reduction processing unit that performs noise reduction processing on the YUV image data by applying the noise reduction intensity data;
An image processing device comprising:

a tone correction step of generating tone-corrected image data by tone-correcting predetermined RGB image data;
a YUV conversion step of generating YUV image data by YUV converting the tone-corrected image data;
As a plurality of input data, at least gain map data corresponding to a tone correction amount for the RGB image data when generating the tone corrected image data in the tone correction step, and luminance data in the YUV image data. , likelihood data indicating the likelihood between the color indicated by the YUV image data and a predetermined color, and predetermined external map data. a noise reduction intensity data generating step for generating noise reduction intensity data by a combination of
a noise reduction processing step of performing noise reduction processing on the YUV image data by applying the noise reduction intensity data;
An image processing method characterized by comprising:

the computer,
tone correction means for generating tone-corrected image data by tone-correcting predetermined RGB image data;
YUV conversion means for generating YUV image data by YUV converting the tone-corrected image data;
As a plurality of input data, at least gain map data corresponding to the gradation correction amount for the RGB image data when the gradation correcting means generates the gradation corrected image data, and luminance data in the YUV image data. , likelihood data indicating the likelihood between the color indicated by the YUV image data and a predetermined color, and predetermined external map data. noise reduction intensity data generating means for generating noise reduction intensity data by a combination of
noise reduction processing means for performing noise reduction processing on the YUV image data by applying the noise reduction intensity data;
A program characterized by functioning as