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System and method for capturing images with multiple image sensing elements

A light-sensing element and image sensor technology, applied in the field of visible image sensor system, can solve the problem of not being optimized

Active Publication Date: 2016-03-30
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the protocol used in U.S. Patent No. 7,019,274 may not be optimized for such a different protocol

Method used

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  • System and method for capturing images with multiple image sensing elements
  • System and method for capturing images with multiple image sensing elements
  • System and method for capturing images with multiple image sensing elements

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Embodiment Construction

[0025] Embodiments relate to methods and systems for extending the dynamic range of a visible image sensor. One embodiment includes a CMOS based visible image sensor incorporating dual diode pixels with different integration times to extend the dynamic range of the image sensor. Extending the dynamic range of visible image sensors is very important because sensors used on typical mobile devices may have insufficient dynamic range to capture the full dynamic range of outdoor images. In some embodiments, CMOS sensors can increase dynamic range by incorporating a dual diode design. For example, such a design could include a larger photodiode with a larger well capacity to absorb more light and provide more detail in the dark areas of the image and a smaller well capacity to provide more detail in the bright areas of the image. Detail of the smaller photodiode.

[0026] The total amount of charge that a light sensing element, such as a photodiode, can hold is called well capacit...

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Abstract

Methods, devices, and computer program products for CMOS visible image sensors incorporating multiple image sensing elements with different integration times to extend dynamic range are disclosed herein. In one aspect, a method of taking an image using a CMOS visible image sensor that includes at least one first light sensing element with a first well capacity and at least one second light sensing element with a second well capacity, where the second well capacity is greater than the first well capacity is disclosed. The method includes determining a first integration time for each of the at least one first light sensing elements. The method further includes determining a second integration time for each of the at least one second light sensing elements, where the second integration time is different than the first integration time.

Description

technical field [0001] The present application relates generally to digital imaging, and more particularly to systems, methods, and devices for visible image sensors that include multiple image sensing elements for extended dynamic range. Background technique [0002] In digital imaging, the dynamic range of complementary metal-oxide-semiconductor (CMOS) sensors may sometimes be insufficient to accurately represent outdoor scenes. This may be especially true in more compact sensors that may be used in mobile devices such as cameras on mobile phones. For example, a typical sensor used in a mobile device camera may have a dynamic range of approximately 6OdB to 7OdB. However, a typical natural outdoor scene can easily cover a contrast range of 100 dB between lighted areas and shadows. Because this dynamic range is greater than that of typical sensors used in mobile devices, detail may be lost in images captured by the mobile device. [0003] Previous attempts to extend the d...

Claims

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Application Information

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IPC IPC(8): H04N5/355
CPCH04N25/585H04N25/583H04N25/778H04N23/45
Inventor 罗家夫林鹏
Owner QUALCOMM INC
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