Conexant Systems, Inc.

Advanced Vision Technology (a.v.t.) Ltd.

Advanced Vision Technology Ltd.

Advance Vision Technology (a.v.t.) Ltd.

Roy Tenny

Michael D Goldstein

Noam Noy

Shay Gilai

A method for detecting nonlinear distortion over communication channels. The method utilizes moment invariants in determining whether nonlinear distortion exists. The method is particularly applicable to detecting the presence of nonlinear distortion over telephone lines that are used for modem communications. The detection of the presence of nonlinear distortion is important in order that appropriate processing operations be performed which are required in the presence of such distortion. The particular processing operations that are performed in the presence of nonlinear distortion function to improve the reliability of data transfer especially at higher data rates. The nonlinearity distortion is detected by calculating high order moment invariants of the error magnitude present at the input to the slicer stage in the receiver. The method of the invention is effective, in part, because the probability density function of the noise is different, i.e., has a different shape, for a channel that contains nonlinear distortion than for one that contains linear, i.e., Gaussian, distortion. In addition, the moment invariant is more sensitive to the size of the error and not necessarily the energy level of the noise.

Method for detecting nonlinear distortion using moment invariants

An apparatus and method for reducing shade effects associated with print quality control, typically generated while viewing or imaging a partly transparent/partly opaque printed material against a light diffusing surface. The reduction in shade effects is by illuminating the printed material from above and viewing or imaging the printed material against a multiple volume light scatterer, thereby redistributing at least part of the light, such that at least part of the scattered light illuminates shaded regions in the image or view obtained.

Apparatus and method for reducing shade effects during print quality

A method for color measurement and control and a color measurement and control system for determining during printing, on-press, the color value of at least one location on a printed substrate. The color measurement and control system includes a camera for acquiring an image of an area of the printed substrate, a color measurement device for measuring a color value of a location of the printed substrate, the color measurement device and the camera are operating substantially simultaneously, and a processing unit for receiving the image captured by the camera and the color measurement and for providing a position of the location with respect to the image employing the image itself. The processing unit is also operative to provide a color value of a desired position, the desired position is selected from the determined position and a position other than the determined position.

System and method for color measurement and control on-press during

A method and a device for evaluating a printing process, which can be used for determining a measurement to be exercised for controlling the printing process. The method comprising the steps of calculating a multidimensional data representation of a reference image, and clustering the multidimensional data representation into at least one cluster of data according to at least one multidimensional clustering algorithm. The device comprising calculating means for calculating a multidimensional data representation of a reference image and clustering means for clustering the multidimensional data representation into at least one cluster of data according to at least one multidimensional clustering algorithm. Each of the clusters of data serves for determining at least one feature of measurement of the reference image. The features of measurement serve for selecting at least one type of physical measurement to be performed on a printed image. Whereas, the physical measurements serve for a color based control of the printing process of the printed image.

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Ramat Hasharon, Israel

Roy Tenny