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公开(公告)号：DE69832357D1
公开(公告)日：2005-12-22
申请号：DE69832357
申请日：1998-06-02
Inventor： AACH TIL , KUNZ WILHELM , KOCH UWE
Abstract: The invention discloses a method of processing an image including the steps of decomposing the image into detail images at successive resolution levels. The detail images at successive resolution levels contain image information at respective spatial scales. Filtering of detail images is carried-out in dependence on at least one subsequent detail image having a lower resolution level than the current detail image. A processed image is reconstructed from the filtered detail images.
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公开(公告)号：DE69624225T2
公开(公告)日：2003-07-10
申请号：DE69624225
申请日：1996-12-13
Inventor： FUDERER MIHA , AACH TIL , KUNZ WILHELM
Abstract: An image is processed taking into account the direction of a predominant structure of the image. Said predominant direction is derived from image information in the image. In particular, the covariance matrix having matrix elements depending on products of differences between pixel-values in separate directions is calculated. The eigenvectors of the covariance matrix correspond with the predominant direction of the image structure and the eigenvalues of the covariance matrix represent the strength of the structure in the image. The covariance matrix is computed locally, i.e. for separate regions in the images so as to take variations of the direction of predominant structures into account.
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公开(公告)号：DE69832357T2
公开(公告)日：2006-08-03
申请号：DE69832357
申请日：1998-06-02
Inventor： AACH TIL , KUNZ WILHELM , KOCH UWE
Abstract: The invention discloses a method of processing an image including the steps of decomposing the image into detail images at successive resolution levels. The detail images at successive resolution levels contain image information at respective spatial scales. Filtering of detail images is carried-out in dependence on at least one subsequent detail image having a lower resolution level than the current detail image. A processed image is reconstructed from the filtered detail images.
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公开(公告)号：DE69624225D1
公开(公告)日：2002-11-14
申请号：DE69624225
申请日：1996-12-13
Inventor： FUDERER MIHA , AACH TIL , KUNZ WILHELM
Abstract: An image is processed taking into account the direction of a predominant structure of the image. Said predominant direction is derived from image information in the image. In particular, the covariance matrix having matrix elements depending on products of differences between pixel-values in separate directions is calculated. The eigenvectors of the covariance matrix correspond with the predominant direction of the image structure and the eigenvalues of the covariance matrix represent the strength of the structure in the image. The covariance matrix is computed locally, i.e. for separate regions in the images so as to take variations of the direction of predominant structures into account.
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Patent Agency Ranking
公开(公告)号：DE69615994T2
公开(公告)日：2002-06-06
申请号：DE69615994
申请日：1996-05-31
Applicant: KONINKL PHILIPS ELECTRONICS NV
Inventor： AACH TIL , KUNZ WILHELM , LUDEKE HERMANN
Abstract: An image processing method includes multi-resolution decomposition to decompose an input image into frequency-band images, which are subsequently filtered according to an order statistics filtering. Preferably, a finite impulse response median hybrid is employed. The filtered frequency-band images are synthesized to form the filtered output image.
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公开(公告)号：DE59510471D1
公开(公告)日：2003-01-09
申请号：DE59510471
申请日：1995-03-16
Inventor： DUQUE-ANTON JESUS-MANUEL , KUNZ WILHELM , RUEBER JAKOB
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公开(公告)号：DE69615994D1
公开(公告)日：2001-11-22
申请号：DE69615994
申请日：1996-05-31
Applicant: KONINKL PHILIPS ELECTRONICS NV
Inventor： AACH TIL , KUNZ WILHELM , LUDEKE HERMANN
Abstract: An image processing method includes multi-resolution decomposition to decompose an input image into frequency-band images, which are subsequently filtered according to an order statistics filtering. Preferably, a finite impulse response median hybrid is employed. The filtered frequency-band images are synthesized to form the filtered output image.
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公开(公告)号：DE69616031T2
公开(公告)日：2002-06-20
申请号：DE69616031
申请日：1996-12-18
Inventor： AACH TIL , KUNZ WILHELM
Abstract: In a method of processing an image the image is divided in one or more blocks. Separate blocks are spatially frequency transformed in that pixel-values of the blocks are transformed into spectral coefficients. A noise level of the image is estimated and reduced spectral coefficients are derived from spectral coefficients and the estimated noise level. Pixel-values for a processed block are synthesized from the reduced spectral coefficients and the processed blocks are assembled into a processed image. The noise level is estimated from the image information within the image. Preferably, a few parameters relating to the circumstances under which the image was acquired are also taken into account for estimating the noise level.
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公开(公告)号：DE69616031D1
公开(公告)日：2001-11-22
申请号：DE69616031
申请日：1996-12-18
Inventor： AACH TIL , KUNZ WILHELM
Abstract: In a method of processing an image the image is divided in one or more blocks. Separate blocks are spatially frequency transformed in that pixel-values of the blocks are transformed into spectral coefficients. A noise level of the image is estimated and reduced spectral coefficients are derived from spectral coefficients and the estimated noise level. Pixel-values for a processed block are synthesized from the reduced spectral coefficients and the processed blocks are assembled into a processed image. The noise level is estimated from the image information within the image. Preferably, a few parameters relating to the circumstances under which the image was acquired are also taken into account for estimating the noise level.
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