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Method and apparatus for calibrating an imaging device

A technology for calibrating data and stereoscopic imaging, which is applied in image analysis, image enhancement, image communication, etc., and can solve problems such as lack of technical calibration procedures

Inactive Publication Date: 2014-03-19
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many users either don't want to or often don't have the skills to successfully complete the calibration procedure

Method used

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  • Method and apparatus for calibrating an imaging device
  • Method and apparatus for calibrating an imaging device
  • Method and apparatus for calibrating an imaging device

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Embodiment Construction

[0036] As described above, relative misalignment between two or more imaging sensors can affect the quality of a stereoscopic image pair produced by an imaging device. In some cases, this misalignment not only results in lower quality stereoscopic images, but may also cause physical effects such as dizziness for the person viewing the images. Therefore, there is a need to reduce or eliminate this misalignment to ensure high quality stereoscopic image pairs and high customer satisfaction.

[0037] One embodiment is a system and method for calibrating a pair of image sensors in an electronic device. The disclosed apparatus and methods can operate continuously and transparently during normal use of the device. Accordingly, these methods and apparatus can reduce or eliminate the need for a user to initiate or otherwise facilitate an explicit calibration process. Those skilled in the art will recognize that these embodiments may be implemented in hardware, software, firmware or a...

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Abstract

Described are methods and apparatus for adjusting images of a stereoscopic image pair based on keypoint matches. The quality of the key point matches is first evaluated to determine whether the quality exceeds a keypoint quality threshold. If the quality level of the keypoint matches exceeds the threshold, the vertical disparity between the images of the stereoscopic image pair can be evaluated based on vertical disparity vectors between the keypoint matches. If the vertical disparity is below a threshold, no adjustment of the stereoscopic image pair may be performed. If the vertical disparity is above the threshold, an affine correction may compensate for pitch, roll, and scale differences between the images. A projective correction may compensate for yaw differences. The vertical disparity between the two images is then evaluated after the corrections to determine if additional adjustment should be performed.

Description

technical field [0001] The present embodiments relate to imaging devices, and in particular, to methods and apparatus for automatic calibration of imaging devices. Background technique [0002] Over the past decade, digital imaging capabilities have been integrated into a wide range of devices, including digital cameras and mobile phones. Recently, the ability to capture stereoscopic images with these devices has become technically possible. Device manufacturers have responded by introducing devices that integrate multiple digital imaging sensors. A wide variety of electronic devices, including mobile wireless communication devices, personal digital assistants (PDAs), personal music systems, digital cameras, digital recording devices, video conferencing systems, etc., utilize multiple imaging sensors to provide a variety of capabilities and features to their user. These include not only stereoscopic (3D) imaging applications such as 3D photo and video or film, but also hi...

Claims

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Application Information

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IPC IPC(8): G06T7/00H04N13/02
CPCG06T7/002G06T2207/10012H04N13/0239H04N13/0246G06T7/85H04N13/246H04N13/239G06T7/00
Inventor 卡林·米特科夫·阿塔纳索夫塞尔久·R·戈马维卡斯·拉马钱德兰
Owner QUALCOMM INC
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