公开(公告)号：US09990211B2

公开(公告)日：2018-06-05

申请号：US15183203

申请日：2016-06-15

Applicant: VMware, Inc.

Inventor： Hari Sivaraman ,  Peter Farkas

IPC: G06K9/00 ,  G06F9/44 ,  G06T7/00 ,  G06T7/40

CPC classification number: G06F9/452 ,  G06T7/0044 ,  G06T7/337 ,  G06T7/408 ,  G06T7/90 ,  G06T2207/10024

Abstract: A method includes displaying a bitmap of unique groups of colored tiles on the display screen and reading a color value of a first pixel in a first tile in the bitmap. Color values of tiles within the first tile's group are determined. The position of the first pixel within the first tile is determined. The position of the first tile's group within the bitmap and the position of the first tile within the bitmap are also determined. The position of the first pixel in the bitmap and the position of the bitmap on the display screen are calculated. A performance metric is calculated based at least in part on the position of the bitmap on the display screen.

公开(公告)号：US09866724B2

公开(公告)日：2018-01-09

申请号：US14743580

申请日：2015-06-18

Applicant: VMware, Inc.

Inventor： Uday Kurkure ,  Hari Sivaraman ,  Peter Farkas ,  Xingze He

IPC: G06K9/00 ,  H04N1/32 ,  G06T1/00 ,  G06T7/00

CPC classification number: H04N1/32219 ,  G06T1/0028 ,  G06T7/0002 ,  G06T2201/0051 ,  G06T2201/0081 ,  G06T2201/0202 ,  G06T2207/10024 ,  G06T2207/30168 ,  H04N1/32277 ,  H04N1/32309

Abstract: Techniques disclosed herein provide an approach using pixel perturbation to transmit information. In one embodiment, a pixel perturbation engine perturbs pixels of an image to encode meta-information therein. In particular, the perturbation engine may perform controlled perturbation of pixel bits which are unlikely to affect visual quality are perturbed, such as perturbing the least significant bits in one or more channels of a RGB or YUV image. Higher order bits may also be perturbed in color channels such as the blue or UV channels that the human eye is less sensitive to. To mitigate loss of information, the information may be encoded using error correcting codes. After the image having meta-information encoded therein is transmitted to a client device, the meta-information may be recovered and used to determine performance of the virtual desktop infrastructures (VDI) system.

公开(公告)号：US09842387B2

公开(公告)日：2017-12-12

申请号：US14743633

申请日：2015-06-18

Applicant: VMware, Inc.

Inventor： Uday Kurkure ,  Hari Sivaraman ,  Peter Farkas ,  Xingze He

IPC: G06K9/36 ,  G06T7/00

CPC classification number: G06T7/0002 ,  G06T2207/10024 ,  G06T2207/20221 ,  G06T2207/30168

Abstract: Techniques disclosed herein provide an approach using pixel perturbation to measure image quality. In one embodiment, a pixel perturbation engine perturbs pixels in an image with a reference image for measuring quality of the image after transmission. By perturbing least significant bits, a composite image may be generated in which the reference image is hidden in the original image. The perturbations in the composite image may then be recovered after the composite image is transmitted to a remote device and used to determine image quality based on preservation of the perturbations. In another embodiment, image(s) perturbed with reference image(s) at increasingly higher order bit positions may be transmitted, and quality of the transmitted reference image determined, until the determined quality exceeds a threshold, with the perturbed bit position at which the determined quality exceeds the threshold being indicative of the quality of the image(s) transmitted.