Method, apparatus and program for noise suppression

a technology of noise suppression and radiographic images, applied in the field of methods, can solve the problems of insufficient suppression of radiographic noise components, quantum noise in radiation noticeable in low density areas, etc., and achieve the effect of reducing the noise components of radiographic images more effectively

Inactive Publication Date: 2011-03-22
FUJIFILM HLDG CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented technology is that it provides a way to reduce unwanted sounds during medical imaging by reducing their impact on the image quality. This makes it easier to interpret and use data from the image without any distortion or errors.

Problems solved by technology

The technical problem addressed in this patent is how to reduce noise in radiographs while maintaining their quality and usefulness.

Method used

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  • Method, apparatus and program for noise suppression
  • Method, apparatus and program for noise suppression
  • Method, apparatus and program for noise suppression

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Embodiment Construction

[0047]Embodiments of the noise suppression processing apparatus according to the present invention will be described below.

[0048]FIG. 1 shows a schematic block diagram showing a configuration of the noise suppression processing apparatus according to an embodiment of the present invention.

[0049]A noise suppression processing apparatus 100 includes: a band-limited image signal generating unit 1 for generating a plurality of band-limited image signals, each representing images having different frequency bands, based on an input image signal Sin representing a radiographic image having a predetermined resolution, obtained by using a reading device or the like; an index value obtaining unit 2 for obtaining an index value indicating a level of noise suppression to be administered to suppress the noise components, based on data representing a radiation dose during obtainment of the radiographic image and data representing spatial frequencies of the radiographic image; a noise suppression pro

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Abstract

A band-limited image signal generating unit decomposes an input image signal into a plurality of band-limited image signals, each representing an image having different frequencies. An index value obtaining unit obtains an index value indicating a level of noise suppression based on data representing spatial frequencies as well as an evaluation value representing local contrast at a pixel of interest in band-limited images and data representing an X-ray dose. A noise suppression processing unit performs noise suppression processing on each pixel of each of band-limited images based on the index value. A processed image generating unit obtains a processed image, in which noise has been suppressed, by adding signals obtained by subtracting processed band-limited image signals, of which noise has been suppressed, from the band-limited image signals together, extracting a noise image signal, and subtracting the noise image signal from the input image signal.

Description

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Claims

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Application Information

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Owner FUJIFILM HLDG CORP
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