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A hand jitter reduction system for cameras

A dynamic and automatic exposure technology, applied to parts of TV systems, static cameras, color TV parts, etc., can solve problems such as not having

Active Publication Date: 2012-11-21
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of said techniques seem to have an acceptable way to digitally compensate for camera movement, especially in low light

Method used

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  • A hand jitter reduction system for cameras
  • A hand jitter reduction system for cameras
  • A hand jitter reduction system for cameras

Examples

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Embodiment Construction

[0022] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any configuration, scheme, design or calibration described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other configurations, schemes, designs or calibrations. In general, this document describes techniques for reducing blur in digital pictures due to hand shake and / or lower than normal lighting conditions. Techniques for calibrating a camera operable in normal mode and hand shake reduction mode are also described.

[0023] In conventional camera devices, when a user takes a snapshot (currently done by pressing a button), typically only one frame is used to generate the picture. Methods that use more than one frame to generate a picture are generally unsuccessful because they produce poor results. With conventional camera devices, the picture may be blurred due to movement caused by the user's own hand movements, known as hand s...

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Abstract

A camera system in normal mode and hand jitter reduction (hjr) mode may comprise generating a first exposure time-gain product by multiplying the normal mode exposure time with the normal mode gain. It may further comprise modifying the normal mode exposure time and gain and multiplying these modified parameters to generate a second exposure time-gain product for a hjr mode that reduces the difference between the first exposure time-gain product and the second exposure time-gain product. To reduce the difference the normal mode frame rate may also be modified. Operation of a camera in normal mode may be in response to a sensed light level being above a threshold. The hjr mode may be selected by the user while the camera is operating. The hjr mode may be used in response to a sensed light level being lower than the threshold.

Description

[0001] cross-related applications [0002] This application claims the benefit of US Provisional Application No. 60 / 760,768, filed January 19, 2006, entitled "HAND JITTER REDUCTION SYSTEM DESIGN." APPLICATION OF THE APPLICATION TO THE APPLICATION AND APPLICATION SERVICE 11 / 534,935 (Attorney Docket No. 060268) entitled "HANDJITTER REDUCTION COMPENSATING FOR ROTATIONAL MOTION," both filed jointly with this application on September 25, 2006 Co-pending Patent Applications and Co-Pending Patent Application No. 11 / 534,808 (Attorney Docket No. 060193), entitled "HAND JITTER REDUCTION FOR COMPENSATING FOR LINEAR DISPLACEMENT" relevant. technical field [0003] This invention relates to digital picture processing and, more particularly, to a hand shake reduction system for a camera. Background technique [0004] The demand for multimedia applications in mobile communications has grown at an astonishing rate. Today, users can send and receive still images as well as download image...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235H04N5/243H04N23/76
CPCH04N5/2352H04N5/23248H04N5/243H04N2101/00H04N5/2353H04N5/2327H04N23/684H04N23/68H04N23/72H04N23/76H04N23/73
Inventor 全舒学钱川·安德鲁·秋江晓云李京强英·谢·诺伊斯卡林·阿塔纳索夫
Owner QUALCOMM INC