Back to results
US 8,411,205 B2Granted
Noise reducing image processing apparatus
AssigneeOlympus Corporation
InventorHiroshi Sasaki
Life of this patent
Estimating the term…
Abstract
An electrical apparatus to reduce noise and minimize a drop in resolution. A recording unit records a processing target frame image and prior and future frame images; a first pixel-extracting section extracts pixels in a prescribed region; a second pixel-extracting section extracts pixels in a region corresponding to the prescribed region in the prior and future frame images; a first distance calculating section calculates temporospatial distances; a second distance calculating section calculates inter-pixel-value distances; and a noise reduction section reduces the processing target frame image on the basis of the temporospatial distance and the inter-pixel-value distance.
Claims14
An image processing apparatus for noise reduction processing of frame images or field images that are input time-sequentially, comprising
- a recording unit configured to record a processing target frame image or field image and previous and future frame images or field images relative to the processing target frame image or field image;
- a first pixel-extracting section configured to extract a plurality of pixels in a prescribed region in the processing target frame image or field image recorded by the recording unit;
- a second pixel-extracting section configured to extract a plurality of pixels in a region corresponding to the prescribed region in the previous frame image or field image and in the future frame image or field image recorded by the recording unit;
- a first distance calculating section configured to calculate temporospatial distances between a target pixel in the prescribed region extracted at the first pixel-extracting section and both the plurality of pixels in the prescribed region and the plurality of pixels in the region corresponding to the prescribed region, extracted at the second pixel-extracting section;
- a second distance calculating section configured to calculate inter-pixel-value distances between the pixel value of the target pixel in the prescribed region extracted at the first pixel-extracting section and both pixel values of the plurality of pixels in the prescribed region extracted at the first pixel-extracting section and pixel values of the plurality of pixels in the region corresponding to the prescribed region, extracted at the second pixel-extracting section;
- and
- a noise reduction section configured to perform noise reduction processing of the processing target frame image or field image on the basis of the temporospatial distance calculated by the first distance calculating section and the inter-pixel-value distance calculated by the second distance calculating section.
4 more elements
A computer readable recording device in which is recorded an image-processing program causing a computer to execute noise reduction processing of frame images or field images that are input time-sequentially, the program causing a computer to execute:
- recording processing for recording a processing target frame image or field image and previous and future frame images or field images relative to the processing target frame image or field image;
- first pixel-extraction processing for extracting a plurality of pixels in a prescribed region in the processing target frame image or field image recorded in the recording processing;
- second pixel-extraction processing for extracting a plurality of pixels in a region corresponding to the prescribed region in the previous frame image or field image and in the future frame image or field image recorded in the recording processing;
- first distance calculating processing for calculating temporospatial distances between a target pixel in the prescribed region extracted in the first pixel-extraction processing and both the plurality of pixels in the prescribed region and the plurality of pixels in the region corresponding to the prescribed region, extracted in the second pixel-extraction processing;
- second distance calculating processing for calculating inter-pixel-value distances between the pixel value of the target pixel in the prescribed region extracted in the first pixel-extraction processing and both pixel values of the plurality of pixels in the prescribed region extracted in the first pixel-extraction processing and pixel values of the plurality of pixels in the region corresponding to the prescribed region, extracted in the second pixel-extraction processing;
- and
- noise reduction processing for performing noise reduction processing of the processing target frame image or field image on the basis of the temporospatial distance calculated by the first distance calculating processing and the inter-pixel-value distance calculated by the second distance calculating processing.
4 more elements
An image processing method for noise reduction processing of frame images or field images that are input time-sequentially, the image processing method comprising:
- a recording step of recording a processing target frame image or field image and previous and future frame images or field images relative to the processing target frame image or field image;
- a first pixel-extraction step of extracting a plurality of pixels in a prescribed region in the processing target frame image or field image recorded in the recording step;
- a second pixel-extraction step of extracting a plurality of pixels in a region corresponding to the prescribed region in the previous frame image or field image and in the future frame image or field image recorded in the recording processing;
- a first distance calculating step of calculating temporospatial distances between a target pixel in the prescribed region extracted in the first pixel-extraction step and both the plurality of pixels in the prescribed region and the plurality of pixels in the region corresponding to the prescribed region, extracted in the second pixel-extraction step;
- a second distance calculating step of calculating inter-pixel-value distances between the pixel value of the target pixel in the prescribed region extracted in the first pixel-extraction step and both pixel values of the plurality of pixels in the prescribed region extracted in the first pixel-extraction step and pixel values of the plurality of pixels in the region corresponding to the prescribed region, extracted in the second pixel-extraction step;
- and
- a noise reduction step of performing noise reduction processing of the processing target frame image or field image on the basis of the temporospatial distance calculated in the first distance calculating step and the inter-pixel-value distance calculated in the second distance calculating step.
4 more elements
Dependencies are inferred from the claim text.