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Texas Instruments : Patent Application Titled "Enhancement of Stereo Depth Maps" Published Online

07/30/2014 | 07:59pm US/Eastern

By a News Reporter-Staff News Editor at Computer Weekly News -- According to news reporting originating from Washington, D.C., by VerticalNews journalists, a patent application by the inventors Narasimha, Rajesh (Plano, TX); Raghuram, Karthik Jayaraman (Santa Clara, CA); Villarreal, JR., Jesse Gregory (Richardson, TX); Pacheco, Roman Joel (Leander, TX), filed on March 21, 2013, was made available online on July 24, 2014.

The assignee for this patent application is Texas Instruments Incorporated.

Reporters obtained the following quote from the background information supplied by the inventors: "Embodiments of the present invention generally relate to enhancing low quality stereo depth maps.

"More and more 3D stereoscopic imaging and augmented reality based applications are being developed for hand-held devices. In such applications, the quality of the depth map generated from image pairs is key for an acceptable user experience. The accuracy and density of generated depth maps are important along with meeting real-time constraints on a resource constrained embedded system."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventors' summary information for this patent application: "Embodiments of the present invention relate to methods, apparatus, and computer readable media for depth map computation. In one aspect, a method for computation of a depth map for corresponding left and right two dimensional (2D) images of a stereo image is provided that includes determining a disparity range based on a disparity of at least one object in a scene of the left and right 2D images, performing color matching of the left and right 2D images, performing contrast and brightness matching of the left and right 2D images, and computing a disparity image for the left and right 2D images after the color matching and the contrast and brightness matching are performed, wherein the disparity range is used for correspondence matching of the left and right 2D images.

"In one aspect, a stereo image processing system is provided that includes a first imaging component arranged to capture a left two-dimensional (2D) image of a scene, a second imaging component arranged to capture a right 2D image of a scene, means for performing color matching of the left and right 2D images, wherein performing color matching includes computing an average R value, an average G value, and an average B value for each of a reference block of pixels in a reference image and a non-reference block of pixels in a non-reference image, wherein the reference image is one of the left 2D image and the right 2D image and the non-reference image is another of the left 2D image and the right 2D image, and wherein the non-reference block of pixels is a block of pixels in the non-reference image corresponding to the reference block of pixels, computing an R gain, a G gain, and a B gain as respective ratios of the average R values of the non-reference block of pixels and the reference block of pixels, the average G values of the non-reference block of pixels and the reference block of pixels, and the average B values of the non-reference block of pixels and the reference block of pixels, and applying the R gain, the G gain, and the B gain to the non-reference image, means for performing contrast and brightness matching of the left and right 2D images, and means for computing a disparity image for the left and right 2D images after the color matching and the contrast and brightness matching are performed.

"In one aspect, a non-transitory computer-readable medium storing software instructions is provided. The software instructions, when executed by a processor, perform a method for computation of a disparity map that includes performing color matching of the left and right 2D images, performing contrast and brightness matching of the left and right 2D images, and computing a disparity image for the left and right 2D images after the color matching and the contrast and brightness matching are performed, wherein computing a disparity image includes computing a first disparity image at a first resolution, computing a second disparity image at a second resolution, wherein the second resolution is lower than the first resolution, upsampling the second disparity image to the first resolution, and filling holes in the first disparity image by interpolating disparity values in selected areas in the first disparity image with disparity values in corresponding selected areas in the upsampled second disparity image.

BRIEF DESCRIPTION OF THE DRAWINGS

"Particular embodiments will now be described, by way of example only, and with reference to the accompanying drawings:

"FIG. 1 is a block diagram of a stereo image processing system;

"FIGS. 2-12 and 14-16 are examples;

"FIGS. 13 and 17 are flow diagrams of methods; and

"FIG. 18 is a block diagram of an illustrative digital system;"

For more information, see this patent application: Narasimha, Rajesh; Raghuram, Karthik Jayaraman; Villarreal, JR., Jesse Gregory; Pacheco, Roman Joel. Enhancement of Stereo Depth Maps. Filed March 21, 2013 and posted July 24, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=2901&p=59&f=G&l=50&d=PG01&S1=20140717.PD.&OS=PD/20140717&RS=PD/20140717

Keywords for this news article include: Software, Texas Instruments Incorporated.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

(c) 2014 NewsRx LLC

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