Patents by Inventor Zorawar S. Bassi
Zorawar S. Bassi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10901309Abstract: Systems and methods for calibrating an image projection system, using image capture devices are disclosed. In particular, Wide-Angle (WA) and Ultra Wide-Angle (UWA) lenses can be utilized to eliminate need for traditional test patterns and tedious alignment settings. That is particularly useful for automatic calibration of projection sources that may require frequent adjustments on the field. Geometric mapping techniques combined with image analytics allow identifying parallel lines in an image captured from a scene. Coordinates of vanishing points corresponding to pairs of parallel lines provide sufficient information to determine orientation of the image projection system in space.Type: GrantFiled: January 12, 2018Date of Patent: January 26, 2021Assignee: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. Bassi, Thushyanthan Jegatheswaran
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Patent number: 10137836Abstract: Vehicle visual systems are disclosed to produce seamless and uniform surround-view images of the vehicle using a number of Ultra Wide-Angle (UWA) lens cameras and optionally HUD systems. A distributive system architecture wherein individual cameras are capable of performing various image transformations allows a flexible and resource efficient image processing scheme.Type: GrantFiled: April 17, 2017Date of Patent: November 27, 2018Assignee: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. Bassi, Ashkan Alavi-Harati, Thushyanthan Jegatheswaran, Edmund Tam
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Patent number: 10040394Abstract: Vehicle visual systems are disclosed to produce seamless and uniform surround-view images of the vehicle using a number of Ultra Wide-Angle (UWA) lens cameras and optionally HUD systems. A distributive system architecture wherein individual cameras are capable of performing various image transformations allows a flexible and resource efficient image processing scheme.Type: GrantFiled: June 17, 2015Date of Patent: August 7, 2018Assignee: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. Bassi, Ashkan Alavi-Harati, Thushyanthan Jegatheswaran, Edmund Tam
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Publication number: 20180196336Abstract: Systems and methods for calibrating an image projection system, using image capture devices are disclosed. In particular, Wide-Angle (WA) and Ultra Wide-Angle (UWA) lenses can be utilized to eliminate need for traditional test patterns and tedious alignment settings. That is particularly useful for automatic calibration of projection sources that may require frequent adjustments on the field. Geometric mapping techniques combined with image analytics allow identifying parallel lines in an image captured from a scene. Coordinates of vanishing points corresponding to pairs of parallel lines provide sufficient information to determine orientation of the image projection system in space.Type: ApplicationFiled: January 12, 2018Publication date: July 12, 2018Applicant: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. BASSI, Thushyanthan JEGATHESWARAN
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Patent number: 9915857Abstract: Systems and methods for calibrating an image projection system, using image capture devices are disclosed. In particular, Wide-Angle (WA) and Ultra Wide-Angle (UWA) lenses can be utilized to eliminate need for traditional test patterns and tedious alignment settings. That is particularly useful for automatic calibration of projection sources that may require frequent adjustments on the field. Geometric mapping techniques combined with image analytics allow identifying parallel lines in an image captured from a scene. Coordinates of vanishing points corresponding to pairs of parallel lines provide sufficient information to determine orientation of the image projection system in space.Type: GrantFiled: December 9, 2013Date of Patent: March 13, 2018Assignee: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. Bassi, Thushyanthan Jegatheswaran
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Publication number: 20170232896Abstract: Vehicle visual systems are disclosed to produce seamless and uniform surround-view images of the vehicle using a number of Ultra Wide-Angle (UWA) lens cameras and optionally HUD systems. A distributive system architecture wherein individual cameras are capable of performing various image transformations allows a flexible and resource efficient image processing scheme.Type: ApplicationFiled: April 17, 2017Publication date: August 17, 2017Applicant: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. BASSI, Ashkan ALAVI-HARATI, Thushyanthan JEGATHESWARAN, Edmund TAM
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Publication number: 20160368417Abstract: Vehicle visual systems are disclosed to produce seamless and uniform surround-view images of the vehicle using a number of Ultra Wide-Angle (UWA) lens cameras and optionally HUD systems. A distributive system architecture wherein individual cameras are capable of performing various image transformations allows a flexible and resource efficient image processing scheme.Type: ApplicationFiled: June 17, 2015Publication date: December 22, 2016Applicant: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. BASSI, Ashkan ALAVI-HARATI, Thushyanthan JEGATHESWARAN, Edmund TAM
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Publication number: 20150160539Abstract: Systems and methods for calibrating an image projection system, using image capture devices are disclosed. In particular, Wide-Angle (WA) and Ultra Wide-Angle (UWA) lenses can be utilized to eliminate need for traditional test patterns and tedious alignment settings. That is particularly useful for automatic calibration of projection sources that may require frequent adjustments on the field. Geometric mapping techniques combined with image analytics allow identifying parallel lines in an image captured from a scene. Coordinates of vanishing points corresponding to pairs of parallel lines provide sufficient information to determine orientation of the image projection system in space.Type: ApplicationFiled: December 9, 2013Publication date: June 11, 2015Applicant: GEO SEMICONDUCTOR INC.Inventors: Zorawar S. Bassi, Thushyanthan Jegatheswaran
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Patent number: 8768094Abstract: Various embodiments are described herein for a system and method for calibrating a display device to eliminate distortions due to various components such as one or more of lenses, mirrors, projection geometry, lateral chromatic aberration and color misalignment, and color and brightness non-uniformity. Calibration for distortions that vary over time is also addressed. Sensing devices coupled to processors can be used to sense display characteristics, which are then used to compute distortion data, and generate pre-compensating maps to correct for display distortions.Type: GrantFiled: January 31, 2013Date of Patent: July 1, 2014Assignee: GEO Semiconductor Inc.Inventors: Zorawar S. Bassi, Masoud Vakili
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Patent number: 8442316Abstract: Systems and methods for improving color and brightness uniformity of an image displayed on a backlit LCD are disclosed. In one example, a correction map is computed and applied to the LCD pixel values. In another example, the voltage settings of the backlight source components are also corrected in addition to the LCD pixel values. For efficient hardware implementation, corrections are applied using function representation of a grid data transformation relating measured values to corrected values. In one particular exemplary embodiment, the backlight source is provided by a plurality of LEDs. In another exemplary embodiment, the display consists of a plurality of OLEDs wherein the light source and the display panels coincide.Type: GrantFiled: April 29, 2011Date of Patent: May 14, 2013Assignee: Geo Semiconductor Inc.Inventors: Zorawar S. Bassi, Ashkan Alavi-Harati
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Patent number: 8116008Abstract: A method for optimizing cost and performance in a lens assembly is disclosed. The method relaxes the constraints of optically correcting lateral chromatic aberration and distortion on the lens assembly and instead electronically corrects for lateral chromatic aberration and distortion. As a result the lens assembly transmissivity and MTF improve dramatically and other aberrations are reduced as a result of re-optimizing the lens assembly merit function. The cost and volume of the lens assembly are reduced as well. The optimized lens assembly could be used in rear or front projection display devices as a well as image acquisition devices.Type: GrantFiled: June 28, 2007Date of Patent: February 14, 2012Assignee: Geo Semiconductor Inc.Inventors: Gregory A. Prior, Gopal Ramachandran, Zorawar S. Bassi
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Patent number: 8055070Abstract: Systems and methods for correcting color and geometry in an image are disclosed. In one example, image data are received in one format and are then converted to another format to perform color correction. In another example, geometric corrections are first applied to each color component of an image data to correct for different distortions including lateral chromatic aberrations. Next, color distortion corrections are performed to correct for each color component of the image data independently. In one particular exemplary embodiment, color distortion corrections are applied using surface function representation of a grid data transformation relating uncorrected values to corrected values.Type: GrantFiled: January 5, 2007Date of Patent: November 8, 2011Assignee: Geo Semiconductor Inc.Inventors: Zorawar S. Bassi, Vladimir Lachine
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Patent number: 7714943Abstract: An ultra-thin rear projection display system (RPDS) is disclosed. The system uses a small flat mirror, a small non-rotationally symmetric mirror and a larger non-rotationally symmetric mirror to achieve a D-to-d ratio of around 11:1 while rendering a significantly distortion free image on the screen. The first two mirrors are significantly smaller than the size of the screen, while the third mirror is significantly larger than the first two mirrors but smaller than the screen. In one embodiment, the lens and light engine are positioned horizontally to one side and, in another example, the lens and light engine are positioned vertically, projecting downwards. In one example, an image processor is used to correct for the remaining distortions. In another example, the system is adapted such that the light rays forming the projected image are within a certain range of angles such that a TIR Fresnel lens could be used to collimate the image.Type: GrantFiled: October 24, 2006Date of Patent: May 11, 2010Assignee: Geo Semiconductor Inc.Inventors: Zorawar S. Bassi, Gopal Ramachandran, Gregory A. Prior
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Patent number: 7474799Abstract: An electronic correction system and method for correcting optical anomalies, namely distortions, color non-convergence (excluding axial chromatic aberration) and luminance (or chrominance) non-uniformity. Each effect is modeled as a transformation in either spatial (positional) space or color space. Representing the effects as transformations of digital pixel data, allows the different anomalies to be resolved within a common framework, namely that of image ‘warping’. The anomaly, having been expressed as a pixel transformation, is then eliminated by electronically applying the inverse transformation. This process is equivalent to digitally manipulating or warping the image in position and/or color space and accordingly this can be achieved using commercially known warping circuits. In addition, the transformation can also contain a component to additionally perform any application specific image warping (e.g. scaling and geometric transformations).Type: GrantFiled: June 12, 2003Date of Patent: January 6, 2009Assignee: Silicon Optix Inc.Inventors: Zorawar S. Bassi, Louie Lee, Gopal Ramachandran
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Publication number: 20090002835Abstract: A method for optimizing cost and performance in a lens assembly is disclosed. The method relaxes the constraints of optically correcting lateral chromatic aberration and distortion on the lens assembly and instead electronically corrects for lateral chromatic aberration and distortion. As a result the lens assembly transmissivity and MTF improve dramatically and other aberrations are reduced as a result of re-optimizing the lens assembly merit function. The cost and volume of the lens assembly are reduced as well. The optimized lens assembly could be used in rear or front projection display devices as a well as image acquisition devices.Type: ApplicationFiled: June 28, 2007Publication date: January 1, 2009Applicant: Silicon Optix Inc.Inventors: Gregory A. Prior, Gopal RAMACHANDRAN, Zorawar S. Bassi
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Publication number: 20080166043Abstract: Systems and methods for correcting color and geometry in an image are disclosed. In one example, image data are received in one format and are then converted to another format to perform color correction. In another example, geometric corrections are first applied to each color component of an image data to correct for different distortions including lateral chromatic aberrations. Next, color distortion corrections are performed to correct for each color component of the image data independently. In one particular exemplary embodiment, color distortion corrections are applied using surface function representation of a grid data transformation relating uncorrected values to corrected values.Type: ApplicationFiled: January 5, 2007Publication date: July 10, 2008Applicant: Silicon Optix Inc.Inventors: Zorawar S. Bassi, Vladimir Lachine
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Patent number: 7359575Abstract: Dynamic warp map generation system and corresponding method are disclosed. A compactor obtains spatial transformation parameters along with geometric and optical distortion parameters and combines them to form hybrid grid data in a hybrid vector space. This vector space is divided into hybrid blocks. In each hybrid block, the grid dataset is fitted with a hypersurface and the surface coefficients are saved in an interface. A decompactor obtains dynamic control parameters representing varying distortion parameters and generates a hybrid space vector. According to the hybrid space vector, a warp map is decoded from the hypersurface coefficients that compensates for dynamic geometric and optical distortions. In another example of the present invention, the dynamic warp map generation system is used for color gamut transformation.Type: GrantFiled: December 7, 2004Date of Patent: April 15, 2008Assignee: Silicon Optix Inc.Inventors: Zorawar S. Bassi, Louie Lee, Gregory Lionel Smith
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Patent number: 7324706Abstract: A system and method for representing a two-dimensional spatial transformation that describes the transformation by an inverse mapped grid data set. The grid data for each coordinate is surface fitted on an array of rectangular patches defined in the output space using numerical techniques. Error analysis determines whether a finer mesh resolution is required for surface fitting. The spatial transformation is then defined by the array of rectangular surface patches and the set of surface coefficients such that the spatial transformation can be executed through evaluation of the surface polynomials. The two-dimensional surface polynomial representation allows the transformation to be easily adjusted for scale changes and zooming and panning effects.Type: GrantFiled: September 9, 2004Date of Patent: January 29, 2008Assignee: Silicon Optix Inc.Inventor: Zorawar S. Bassi
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Patent number: 7239360Abstract: A short throw projection system and method for displaying a corrected optical image on a projection screen based on input image data that includes an electronic correction unit, an image projector and a reflection assembly. The electronic correction unit receives the input image data and generates pre-distorted image data. The image projector receives the pre-distorted image data from the electronic correction unit and projects a pre-distorted optical image that corresponds to the pre-distorted image data or a pre-distorted image compensated by the projection optic distortion. The optical reflection assembly is positioned in the optical path of the pre-distorted optical image to project an optical image on the projection screen. The reflection assembly can consist of various combinations of curved and planar mirrors as desired.Type: GrantFiled: June 12, 2003Date of Patent: July 3, 2007Assignee: Silicon Optix Inc.Inventors: Zorawar S. Bassi, Gregory Lionel Smith, Louie Lee
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Patent number: 7126616Abstract: An image transformation method for translating a non-linear 2D geometrical transformation into two separable 1D geometrical transformations first determines the inverse of the 2D geometrical transformation to form an inverse 2D geometrical transformation. Then the method converts the inverse 2D geometrical transformation into an analytical inverted 2D geometrical transformation and separates the analytical inverse 2D geometrical transformation into first and second 1D geometrical transformations. The method then represents said inverse 2D geometrical transformation and first and second 1D geometrical transformations as tensor spline surfaces and then compares an evaluation of said first and second 1D geometrical transformations at each pixel with an evaluation of the analytical inverse 2D geometrical transformation at each pixel. If the error evaluation does not meet a predetermined level of performance then the separation and transformation steps are repeated.Type: GrantFiled: June 12, 2002Date of Patent: October 24, 2006Assignee: Silicon Optix Inc.Inventors: Tomislav Jasa, Zorawar S. Bassi, Louie Lee