JP2010175737A5

JP2010175737A5 -

Info

Publication number: JP2010175737A5
Application number: JP2009017126A
Authority: JP
Filing date: 2009-01-28
Publication date: 2012-03-15
Anticipated expiration: 2029-01-28

Description

上述した課題を解決するための本発明の一態様による動画像処理装置は、入力フレーム画像を、空間周波数の低域成分のみを含む信号からなる第１のサブフレームと、空間周波数の高域成分を含む信号からなる第２のサブフレームとに分配して出力する動画像処理装置であって、入力フレーム画像のエッジ領域と平坦領域とを検出し、エッジ領域および平坦領域を用いてエッジ近傍の平坦領域を検出する検出手段と、エッジ領域のエッジ強度および平坦領域の平坦度を検出し、エッジ強度および平坦度に基づきエッジ近傍の平坦領域の特徴量を求め、特徴量に応じてエッジ近傍の平坦領域の信号の分配比率を決定する決定手段と、入力フレーム画像の低域成分と分配比率とに基づき第１のサブフレームを生成する第１の生成手段と、入力フレーム画像から第１のサブフレームを減じて第２のサブフレームを生成する第２の生成手段と、第１および第２のサブフレームを入力フレーム画像のフレーム期間に順次出力する出力手段とを有する。
Moving image processing apparatus according to an aspect of the present invention to solve the problems described above mentioned the input frame image, a first sub-frame of the signal containing only low-frequency components of the spatial frequencies, the spatial frequency high-frequency the moving-picture processing device which distributes output to the second sub-frame of the signal comprising components, to detect an edge region and the flat region of the input frame picture image, the edge using the edge region and the flat region Detection means for detecting a flat area in the vicinity, edge strength of the edge area and flatness of the flat area are detected, and a feature value of the flat area in the vicinity of the edge is obtained based on the edge strength and flatness. A determining unit that determines a distribution ratio of a signal in a neighboring flat region; a first generating unit that generates a first subframe based on a low-frequency component and a distribution ratio of an input frame image; Second generation means for generating a second subframe by subtracting the first subframe from the frame image, and output means for sequentially outputting the first and second subframes during the frame period of the input frame image. you.

また、本発明の他の態様による動画像処理方法は、入力フレーム画像を、空間周波数の低域成分のみを含む信号からなる第１のサブフレームと、空間周波数の高域成分を含む信号からなる第２のサブフレームとに分配して出力する動画像処理方法であって、入力フレーム画像のエッジ領域と平坦領域とを検出し、エッジ領域および平坦領域を用いてエッジ近傍の平坦領域を検出する検出ステップと、エッジ領域のエッジ強度および平坦領域の平坦度を検出し、エッジ強度および平坦度に基づきエッジ近傍の平坦領域の特徴量を求め、特徴量に応じてエッジ近傍の平坦領域の信号の分配比率を決定する決定ステップと、入力フレーム画像の低域成分と分配比率とに基づき第１のサブフレームを生成する第１の生成ステップと、入力フレーム画像から第１のサブフレームを減じて第２のサブフレームを生成する第２の生成ステップと、第１および第２のサブフレームを入力フレーム画像のフレーム期間に順次出力する出力ステップとを有する。
A moving image processing method according to another aspect of the present invention includes an input frame image including a first subframe including a signal including only a low frequency component of a spatial frequency and a signal including a high frequency component of the spatial frequency. a moving image processing method of outputting partitioned between second subframe, detects the edge region and the flat region of the input frame image picture, detecting a flat region near an edge using the edge region and the flat region Detecting step, detecting the edge strength of the edge region and the flatness of the flat region, obtaining the feature amount of the flat region near the edge based on the edge strength and flatness, and determining the signal of the flat region near the edge according to the feature amount A determination step for determining a distribution ratio of the input frame image, a first generation step for generating a first subframe based on the low frequency component of the input frame image and the distribution ratio, and the input frame image That Yusuke a second generation step of generating a second subframe by subtracting et first subframe, and an output step for sequentially outputting the frame period of the first and second sub-frame input frame image .

Claims

Video processing that distributes and outputs an input frame image to a first sub-frame composed of a signal including only a low-frequency component of spatial frequency and a second sub-frame composed of a signal including a high-frequency component of spatial frequency A device,
Detecting a flat region and an edge region of the input frame picture image, and detecting means for detecting a flat region near an edge using the edge region and the flat region,
The edge strength of the edge region and the flatness of the flat region are detected, the feature amount of the flat region near the edge is obtained based on the edge strength and the flatness, and the flat region near the edge according to the feature amount Determining means for determining a signal distribution ratio of
First generation means for generating the first subframe based on a low frequency component of the input frame image and the distribution ratio;
Second generation means for generating the second subframe by subtracting the first subframe from the input frame image;
The moving image processing apparatus comprising: output means for sequentially outputting the first and second subframes in a frame period of the input frame image.

The determining means calculates the feature amount,
The edge strength of the edge region is strong, and the flatness of the flat region is large, and the distribution ratio is reduced.
The moving image processing apparatus according to claim 1, wherein the distribution ratio is set to a value that increases as the edge strength of the edge region decreases or the flatness of the flat region decreases.

The detection means includes
Extended flat area generating means for generating an extended flat area obtained by extending the flat area;
Extended edge region generation means for generating an extended edge region obtained by extending the edge region;
3. The moving image processing apparatus according to claim 1, further comprising an overlap detection unit configured to detect a region where the extended edge region and the extended flat region overlap as a flat region in the vicinity of the edge.

The extended edge region generation means includes:
The moving image processing apparatus according to claim 3, wherein an edge region of the image is detected from a signal obtained by extracting the low frequency component from the input frame image.

The first generation means includes:
The low frequency component of the input frame image is extracted, and the first sub-frame is generated by multiplying the low frequency component by the distribution ratio. 2. A moving image processing apparatus according to item 1.

The first generation means includes:
4. The first sub-frame is generated by multiplying the input frame image by the distribution ratio and then extracting the low-frequency component to generate the first sub-frame. 5. Moving image processing apparatus.

The determining means includes
The moving image processing apparatus according to any one of claims 1 to 6, wherein the distribution ratio is linearly changed from within a flat region near the edge to outside a flat region near the edge. .

The determining means includes
The moving image processing apparatus according to claim 1, wherein the distribution ratio is smoothly changed from within a flat region near the edge to outside a flat region near the edge.

The output means includes
The moving image according to any one of claims 1 to 8, wherein the first and second sub-frames are alternately output sequentially at a frame frequency that is twice the frame frequency of the input frame image. Image processing device.

Video processing that distributes and outputs an input frame image to a first sub-frame composed of a signal including only a low-frequency component of spatial frequency and a second sub-frame composed of a signal including a high-frequency component of spatial frequency A method,
Detecting means detects a flat region and an edge region of the input frame picture image, and detecting a flat region near an edge using the edge region and the flat region,
The determining means detects edge strength of the edge region and flatness of the flat region, obtains a feature value of the flat region near the edge based on the edge strength and flatness, and determines the edge according to the feature value. A determining step for determining a distribution ratio of a signal in a neighboring flat region;
A first generation step in which first generation means generates the first subframe based on a low frequency component of the input frame image and the distribution ratio;
A second generation step in which a second generation unit generates the second subframe by subtracting the first subframe from the input frame image;
A moving image processing method comprising: an output unit that sequentially outputs the first and second sub-frames in a frame period of the input frame image.

Program for operating the computer be executed to read the computer as the moving image processing apparatus according to any one of claims 1 to 9.

More readable recording medium recording a computer program of claim 11.