公开(公告)号：US09325985B2

公开(公告)日：2016-04-26

申请号：US13903652

申请日：2013-05-28

Applicant: Apple Inc.

Inventor： Krasimir D. Kolarov ,  Steven E. Saunders

IPC: H04N17/02 ,  H04N17/04 ,  H04N17/00

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。