公开(公告)号：US10957358B2

公开(公告)日：2021-03-23

申请号：US16252425

申请日：2019-01-18

Applicant: Apple Inc.

Inventor： Krasimir D. Kolarov ,  Steven E. Saunders

IPC: G11B27/031 ,  H04N17/00 ,  H04N19/426 ,  G06K9/00 ,  G06K9/52 ,  G06K9/62 ,  G06T5/00 ,  G06T7/00

Abstract: Devices and methods for determining image quality using full-reference and non-reference techniques. Full reference image quality may be determined prior to output of an image or video frame from an image sensor processor by temporarily retaining image data from the image sensor and comparing processed image data of the image to the retained, non-processed image data of the same image. Full reference image quality determination may be assisted by a heuristic-based fault indicator. Image quality may also be determined by a non-reference technique of matching the image to one of various scenarios that are associated with sets of heuristics and applying the heuristics of the particular scenario to the image. Instead of relying on a nominal frame rate, video timing quality may be determined by comparing the capture time interval between successive video frames to the presentation time interval of the same video frames.

公开(公告)号：US10593295B2

公开(公告)日：2020-03-17

申请号：US14673824

申请日：2015-03-30

Applicant: Apple Inc.

Inventor： Krasimir D. Kolarov ,  Steven E. Saunders

IPC: H04N17/00 ,  H04N19/154 ,  G09G5/14 ,  H04N5/265 ,  G06F3/0484

Abstract: A video quality comparison tool provides for direct visual perceptual comparison of video sequences. Two inputs are presented at the same position and size, with no-look user choice of which to see and easy back-and-forth comparison while the videos are playing, single-stepping, or paused.

公开(公告)号：US10264269B2

公开(公告)日：2019-04-16

申请号：US14687316

申请日：2015-04-15

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  David W. Singer ,  Krasimir D. Kolarov ,  Steven E. Saunders ,  Guy Cote ,  Sorin Cismas

IPC: H04N19/12 ,  H04N19/44 ,  H04N19/46 ,  H04N19/105 ,  H04N19/147 ,  H04N19/154 ,  H04N19/156 ,  H04N19/172 ,  H04N19/196

Abstract: In a coding system, an encoder codes video data according to a predetermined protocol, which, when decoded causes an associated decoder to perform a predetermined sequence of decoding operations. The encoder may perform local decodes of the coded video data, both in the manner dictated by the coding protocol that is at work and also by one or more alternative decoding operations. The encoder may estimate relative performance of the alternative decoding operations as compared to a decoding operation that is mandated by the coding protocol. The encoder may provide identifiers in metadata that is associated with the coded video data to identify such levels of distortion and/or levels of resources conserved. A decoder may refer to such identifiers when determining when to engage alternative decoding operations as may be warranted under resource conservation policies.

公开(公告)号：US20160240224A1

公开(公告)日：2016-08-18

申请号：US15137998

申请日：2016-04-25

Applicant: Apple Inc.

Inventor： Krasimir D. Kolarov ,  Steven E Saunders

IPC: G11B27/031 ,  G06T7/00 ,  G06K9/00 ,  G06K9/52 ,  G06T5/00 ,  G06K9/62 ,  H04N19/426

CPC classification number: G11B27/031 ,  G06K9/00718 ,  G06K9/52 ,  G06K9/6202 ,  G06T5/00 ,  G06T7/0002 ,  G06T2207/30168 ,  H04N17/002 ,  H04N17/004 ,  H04N19/426

Abstract: Devices and methods for determining image quality using full-reference and non-reference techniques. Full reference image quality may be determined prior to output of an image or video frame from an image sensor processor by temporarily retaining image data from the image sensor and comparing processed image data of the image to the retained, non-processed image data of the same image. Full reference image quality determination may be assisted by a heuristic-based fault indicator. Image quality may also be determined by a non-reference technique of matching the image to one of various scenarios that are associated with sets of heuristics and applying the heuristics of the particular scenario to the image. Instead of relying on a nominal frame rate, video timing quality may be determined by comparing the capture time interval between successive video frames to the presentation time interval of the same video frames.

Abstract translation: 使用全参考和非参考技术确定图像质量的设备和方法。 可以在从图像传感器处理器输出图像或视频帧之前通过临时保留来自图像传感器的图像数据并将图像的处理后的图像数据与保持的未处理的图像数据进行比较来确定完整参考图像质量 图片。 完全参考图像质量确定可以通过基于启发式的故障指示器来辅助。 图像质量也可以通过将图像匹配到与启发式集合相关联的各种场景之一并将特定场景的启发式应用于图像的非参考技术来确定。 可以通过将连续视频帧之间的捕获时间间隔与相同视频帧的呈现时间间隔进行比较来确定视频定时质量。

公开(公告)号：US08994828B2

公开(公告)日：2015-03-31

申请号：US13780686

申请日：2013-02-28

Applicant: Apple Inc.

Inventor： Krasimir D. Kolarov ,  Steven E. Saunders

IPC: H04N17/00 ,  H04N5/265

CPC classification number: G09G5/14 ,  G06F3/04845 ,  G06F2203/04803 ,  H04N5/265 ,  H04N17/00 ,  H04N17/004 ,  H04N19/154

Abstract: A video quality comparison tool provides for direct visual perceptual comparison of video sequences. Two inputs are presented at the same position and size, with no-look user choice of which to see and easy back-and-forth comparison while the videos are playing, single-stepping, or paused.

Abstract translation: 视频质量比较工具提供视频序列的直观视觉感知比较。 两个输入以相同的位置和大小呈现，在视频播放，单步或暂停时，无需查看用户选择和容易的前后比较。

公开(公告)号：US20140240516A1

公开(公告)日：2014-08-28

申请号：US13780686

申请日：2013-02-28

Applicant: APPLE INC.

Inventor： Krasimir D. Kolarov ,  Steven E. Saunders

IPC: H04N17/00 ,  H04N5/265

CPC classification number: G09G5/14 ,  G06F3/04845 ,  G06F2203/04803 ,  H04N5/265 ,  H04N17/00 ,  H04N17/004 ,  H04N19/154

Abstract: A video quality comparison tool provides for direct visual perceptual comparison of video sequences. Two inputs are presented at the same position and size, with no-look user choice of which to see and easy back-and-forth comparison while the videos are playing, single-stepping, or paused.

Abstract translation: 视频质量比较工具提供视频序列的直观视觉感知比较。 两个输入以相同的位置和大小呈现，在视频播放，单步或暂停时，无需查看用户选择和容易的前后比较。