Class / Patent application number | Description | Number of patent applications / Date published |
348618000 | For removal of low amplitude random noise (e.g., variable bandwidth) | 11 |
20090051816 | Image Processing Apparatus, Projector, Image Processing Method, and Method For Controlling Image Processing Apparatus - An image processing apparatus includes an image signal input unit that receives an input of an image signal representing an image to be displayed, a noise reduction unit that performs noise reduction for reducing the noise contained in the image signal, and an image quality adjustment unit that performs image quality adjustment for adjusting the displayed image quality of the image on the image signal that has undergone the noise reduction. | 02-26-2009 |
20100238356 | Video signal processing method and apparatus - Low frequency components are extracted from a video signal for pixels in a specific area of an image carried by the signal. The low frequency components are allocated, based on luminance components of the signal, to gradations ranging from maximum to minimum levels exhibited by the luminance components, luminance histogram data being produced indicating the frequency of gradations for the pixels. The gradations are allocated to the pixels based on the luminance components to produce high-frequency component histogram data indicating the frequency of gradations for specific pixels each carrying a high frequency component. The luminance histogram data is corrected in accordance with the frequency of gradations in the high-frequency component histogram data to produce corrected luminance histogram data. A gradation correction curve is produced for correcting the gradations exhibited by the signal using the corrected data. The luminance components are corrected based on the correction curve. | 09-23-2010 |
20130242198 | METHOD AND APPARATUS FOR REDUCING NOISE OF VIDEO - A method and apparatus for reducing noise of a video image are provided. The method includes: reducing noise in a difference between a current frame and a previous frame in which temporal noise is reduced; detecting motion information about the current frame based on the difference in which the noise is reduced; reducing temporal noise in the current frame via a weighted sum of the current frame and the previous frame in which the temporal noise is reduced, according to the motion information; and reducing spatial noise in the current frame based on an edge direction of the current frame in which the temporal noise is reduced. | 09-19-2013 |
20130265497 | FILTERING METHOD FOR REMOVING BLOCK ARTIFACTS AND/OR RINGING NOISE AND APPARATUS THEREFOR - Provided are a filtering method and apparatus for removing blocking artifacts and ringing noise. The filtering method includes transforming video data on a block-by-block basis, and detecting the presence of an edge region in the video data by checking the distribution of values obtained by the transformation. Accordingly, it is possible to completely remove blocking artifacts and/or ringing noise by more effectively detecting the presence of an edge region in video data. | 10-10-2013 |
348619000 | Averaging type | 6 |
20110242423 | Method and Apparatus for Motion Detection - A motion detection method includes steps of receiving a previous frame and a current frame, calculating a pixel value difference of a target pixel between the previous frame and the current frame to determine a temporal pixel difference, calculating pixel value differences between the target pixel and surrounding pixels of the target pixel in the previous frame and the current frame, respectively, to determine a spatial pixel difference, and dividing the temporal pixel difference by the spatial pixel difference to determine a motion value of the target pixel. | 10-06-2011 |
348620000 | Using frame or field delays (e.g., motion adaptive) | 5 |
20090002559 | Phase Shift Insertion Method For Reducing Motion Artifacts On Hold-Type Displays - A method and system for displaying frames on a hold-type display to reduce perceived blur are disclosed. One example method includes detecting a parameter associated with an object in an input frame and filtering the input frame to generate at least two filtered sub-frames based on the parameter. The filtered sub-frames are then inserted in place of the input frame in a frame sequence and output to a display. The parameter associated with the object may indicate a magnitude and direction of the object's movement in a sequence of frames including the input frame. | 01-01-2009 |
20090153739 | Method and Apparatus for a Noise Filter for Reducing Noise in a Image or Video - A noise filter method and apparatus for producing at least one of a video or an image with reduced noise. The noise filter method includes performing noise estimation on a frame of at least one of an image or video and applying a low pass filter on the noise level according to the noise estimation, performing spatial filtration on the frame, performing motion detection on a spatially filtered frame, determining motion-to-blending factor conversion and, accordingly, performing frame blending, and outputting a frame with reduced noise. | 06-18-2009 |
20090273717 | Noise reduction processing apparatus, noise reduction processing method, and image sensing apparatus - An image signal subjected to three-dimensional noise reduction processing in a three-dimensional noise reduction processing portion is reduced by an electronic zoom portion, and is stored as a low-resolution image in a frame memory. The image signal stored in the frame memory is enlarged by an electronic zoom portion, and is fed to a three-dimensional noise reduction processing portion; it is then converted into an image signal having the same resolution as an image signal of a high-resolution image inputted from outside. | 11-05-2009 |
20100165207 | APPARATUS AND METHOD OF MOTION DETECTION FOR TEMPORAL MOSQUITO NOISE REDUCTION IN VIDEO SEQUENCES - Apparatus and methods of motion detection for mosquito noise reduction in video sequences are provided. In one aspect, a method of motion detection in a sequence of digital images classifies a pixel of a plurality of pixels of a current image frame represented by a digital video input signal as a motion or non-motion pixel. A motion value for the pixel is calculated based on the classification of the pixel. The motion value is mapped to a coefficient of a temporal filter based on a control curve. A digital video output signal is generated based on the coefficient. | 07-01-2010 |
20130083246 | SCENE ADAPTIVE TEMPORAL FILTERING - Calculating a temporal filter values to filter video data for noise and ghosting artifacts. A sensor specific noise model may be derived using the video capture settings of the video source to estimate the noise variance for an image, and to determine the amount of the temporal filtering to be applied to a frame or pixel. The global motion and sensor specific noise model may be used to populate filter coefficient look-up tables based on the local motion and luma values of each pixel in the frame. The maximum absolute difference between frames may be used to estimate global motion between two frames such that filter strength may be reduced for frames exhibiting high global motion and increased for frames exhibiting low global motion. According to an embodiment, the increase in temporal filtering between frames may be capped to avoid sudden visible noise differences between frames. | 04-04-2013 |
348622000 | Noise component generator, limiter, subtractor type | 1 |
20140247395 | METHOD AND DEVICE TO ENHANCE IMAGE QUALITY IN DIGITAL VIDEO PROCESSING SYSTEMS USING DITHERING - A processing chain for a digital image signal applies a dither pattern, having a first spectrum, to the image signal at a point in the processing chain. A further noise pattern is applied to the image signal during the processing chain. The noise pattern has a second spectrum which is configured such that the combination of the first spectrum and second spectrum results in a more continuous spectrum. Another aspect describes a noise pattern which can be used as an offset dither pattern for digital images, especially before colour bit depth reduction. The noise pattern has an array of values which are linearly distributed across a range, with each value in the range occurring an equal number of times. | 09-04-2014 |