JP2008182477A5

JP2008182477A5 -

Info

Publication number: JP2008182477A5
Application number: JP2007014199A
Authority: JP
Filing date: 2007-01-24
Publication date: 2010-04-15
Anticipated expiration: 2027-01-24

Claims

An edge intensity measuring means for calculating the horizontal and vertical edge intensity data by measuring the intensity of the horizontal and vertical edges with respect to each block definitive the luminance signal of the image,
An edge intensity storing means for one frame stored even the horizontal and vertical edge intensity data small without
The calculated edge intensity data of each block from the horizontal and vertical edge intensity data of each block stored in the edge intensity storage unit, the edge intensity data of the block from the size, the pair Zobu lock for performing a filtering process A calculation means for calculating specific information to be identified;
Storage means for storing the specific information calculated by the calculation means for at least one frame;
A horizontal filter means for performing horizontal filtering process to the target block of the luminance signal of the image,
Two-dimensional filter means for performing a two-dimensional filtering process on a target block of the luminance signal of the image;
Relative pair Zobu lock to perform the filtering process specified by the specifying information stored in the storage means, the target block is calculated from the horizontal and vertical edge intensity data for the current frame calculated by the edge intensity measuring means difference value between the response and the edge intensity data blocks, before Symbol edge strength storing means stored said edge intensity data calculated from the horizontal and vertical edge intensity data block corresponding to the current block immediately preceding the current frame When the from the difference value between the target block of the vertical edge intensity data and the horizontal edge intensity data of the current frame, said horizontal filter means or by performing a filtering process by the two-dimensional filter means to the target block before Kigen frame Filter control means for controlling whether or not to output;
An image processing apparatus comprising:

The calculation unit, the edge strength of the horizontal and vertical Chokue Tsu di intensity data stored in the storage means is added to each block to calculate the edge intensity data of each block, the calculated edge intensity data a block larger than the first threshold value, and determines the identification information for identifying the blocks adjacent to the block having the first small second following the edge intensity data threshold than the threshold value The image processing apparatus according to claim 1.

The filter control means includes
Said the horizontal and vertical Chokue Tsu di intensity data stored in the edge intensity storage unit is added to each block, means for calculating the edge intensity data of each block of the previous frame,
Have a means for calculating the horizontal and vertical Chokue Tsu di intensity data, the edge intensity data of each block of said by adding each corresponding blocks current frame of the current frame calculated by the edge intensity measuring means And
The difference value of the edge intensity data of each corresponding block of the current frame and the previous frame, wherein the difference value between the vertical edge intensity data and the horizontal edge intensity data of the target block in the current frame, said horizontal filter means 2. The image processing apparatus according to claim 1, wherein it is determined whether or not the target block filtered by the two-dimensional filter means is adopted.

The image processing apparatus according to claim 1, wherein the edge strength storage unit and the storage unit include a plurality of memory banks, and the memory bank is switched for each frame image processing.

An edge intensity measuring step of calculating the horizontal and vertical edge intensity data by measuring the intensity of the horizontal and vertical edges with respect to each block definitive the luminance signal of the image,
An edge intensity storage step of storing in one frame the first memory even the least without the horizontal and vertical edge intensity data,
The first calculates the edge intensity data of each block from the horizontal and vertical edge intensity data of each block stored in the memory, the size of the edge intensity data of the block, identifying pairs Zobu lock for performing a filtering process A calculation step of calculating specific information to be performed;
A storage step of storing the specific information calculated by the calculation step in a second memory for at least one frame;
A horizontal filter step of performing horizontal filtering process to the target block of the luminance signal of the image,
A two- dimensional filtering step for performing a two-dimensional filtering process on a target block of the luminance signal of the image;
Relative pair Zobu lock to perform the filtering process specified by the specifying information stored in the second memory, the target block is calculated from the horizontal and vertical edge intensity data for the current frame calculated by the edge intensity measuring step an edge intensity data of the corresponding block to a difference value between the edge intensity data calculated from the horizontal and vertical edge intensity data of the block corresponding to the target block of the immediately preceding frame of the said current frame stored in the first memory The filtering process by the horizontal filtering process or the two-dimensional filtering process is performed on the target block of the current frame from the difference value between the vertical edge strength data and the horizontal edge strength data of the target block of the current frame and output. A filter control step for controlling whether or not,
An image processing method comprising:

The calculating step, the said horizontal and vertical Chokue Tsu di intensity data stored in the first memory is added to each block to calculate the edge intensity data of each block, the calculated edge intensity data first a larger block than the first threshold value, claims and determines the identification information for identifying the blocks adjacent to the block having the first small second following the edge intensity data threshold than the threshold value Item 6. The image processing method according to Item 5.

The filter control step includes
Said first said horizontal and vertical Chokue Tsu di intensity data stored in the memory is added to each block, a step of calculating an edge intensity data of each block of the previous frame,
The horizontal and vertical Chokue Tsu di intensity data of the current frame calculated by the edge intensity measuring step, is added to each corresponding blocks, and a step of calculating the edge intensity data of each block of the current frame Have
From said previous frame the difference value of the edge intensity data of each corresponding block of the current frame, the difference value between said vertical edge intensity data of the target block in the current frame the horizontal edge intensity data, said horizontal filter process 6. The image processing method according to claim 5, wherein it is determined whether or not the target block filtered by the two-dimensional filter process is adopted.

The image according to any one of claims 5 to 7, wherein the first memory and the second memory are configured by a plurality of memory banks, and the memory banks are switched for each image processing of each frame. Processing method.