Patent application number | Description | Published |
20100128168 | Apparatus and method for coding block boundary detection using interpolated autocorrelation - An apparatus and method for coding block boundary detection using interpolated autocorrelation is disclosed. Input video frames are processed to obtain a binary map of possible block boundary pixels including original and rescaled block boundaries. The boundary pixel map is converted to a boundary histogram. Then interpolated autocorrelation is applied to the boundary histogram to detect the block size and block size offset. The interpolated autocorrelation handles both integer sizes and non-integer sizes. A confidence measure is also determined that reflects the accuracy of the detection result. The output for the current video frame is also post processed with information from previous frames to provide better temporal stability. | 05-27-2010 |
20100165204 | System and process for image rescaling using adaptive interpolation kernel with sharpness and overshoot control - Provided are a digital video rescaling system, a method of rescaling video images, and a chip comprising a computer executable medium embedded therein computer executable instructions for rescaling video images. | 07-01-2010 |
20110129146 | METHOD FOR PROCESSING A DIGITAL IMAGE, IN PARTICULAR FOR PROCESSING CONTOUR REGIONS, AND CORRESPONDING DEVICE - The invention concerns a device for processing a digital image comprising at least one contour region, including sharpness processing of the contour region. The sharpness processing includes converting data of the level of pixels of the contour zone into initial main data (step | 06-02-2011 |
20110298972 | System and process for image rescaling using adaptive interpolation kernel with sharpness and de-ringing control - A digital video rescaling system is provided. The system includes an image data input configured to receive input support pixels y | 12-08-2011 |
20120092358 | Noise-robust edge enhancement system and method for improved image sharpness - A system for edge enhancement includes an input unit to receive an input signal Yin, a vertical enhancement unit to perform a vertical enhancement of an edge of the input signal Yin to generate an output YEV, and a horizontal enhancement unit to perform a horizontal enhancement of the edge of the input signal Yin to generate an output YEH. The system also includes a local gradient analysis unit to generate a local gradient direction GradDir and a local gradient magnitude GradMag based at least partly upon the input signal Yin, and a mixer to generate an output Yout by mixing the output YEV with the output YEH using the local gradient direction GradDir. The system further includes an output unit to output the output Yout. | 04-19-2012 |
20120155783 | DIRECTIONAL ANTI-ALIASING FILTER - A directional anti-aliasing filter circuit includes an input node and an output node, a directional anti-aliasing filter having an input coupled to the input node, an adaptive gain control having an input coupled to an output of the directional anti-aliasing filter, a summer having a first input coupled to an output of the adaptive gain control, a second input coupled to the input node, and an output coupled to the output node, a texture detector for providing a texture adjust signal to the directional anti-aliasing filter and a texture adaptive gain signal to the adaptive gain control, an edge detector for providing an edge direction signal to the directional anti-aliasing filter, and a corner detector for providing a corner adaptive gain signal to the adaptive gain control. | 06-21-2012 |
20130322784 | 2D RINGING AND OVERSHOOT CONTROL IN IMAGE RESCALING - The methods and systems of this invention allow for independent adaptive control of ringing and overshoot effects in 2-dimensional array interpolation processes, including in image and video rescaling and analysis. The methods and systems can use either a column-wise or a row-wise interpolation, or a combination thereof. Each uses a respective preliminary interpolation of data, followed by ringing and/or overshoot control. Controllable parameters allow variability in the amount of ringing and/or overshoot retained in the interpolated data. The ringing and overshoot controls apply a local analysis of the data to adjust the preliminary interpolation results. The methods may be repeated iteratively, for example, to obtain a desired rescaling of an image data array. | 12-05-2013 |
20140294307 | CONTENT-BASED ASPECT RATIO DETECTION - A system for determining an aspect ratio of image content based on an analysis of the content. In an embodiment, an analyzer is configured to receive a data input corresponding to an image in a stream of images that constitute a video sequence of images. The analyzer is further configured to determine a mathematical representation of the image content based on a power spectrum analysis of vertical components of the image in comparison to a power spectrum analysis of horizontal components of the image. Based on this comparison of the vertical frequency components to the horizontal frequency components, a determination about the original aspect ratio of the image may be determined. This determination may be used by a video processor to correctly apply aspect ratio conversion for final image output. | 10-02-2014 |
20140362288 | SYSTEM AND PROCESS FOR IMAGE RESCALING USING ADAPTIVE INTERPOLATION KERNAL WITH SHARPNESS AND DE-RINGING CONTROL - A digital video rescaling system is provided. The system includes an image data input configured to receive input support pixels y | 12-11-2014 |