System and method for demosaicing image data using weighted gradients

A technology of image data and original image, applied in the field of digital imaging equipment

Inactive Publication Date: 2012-08-15
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these conventional demosaicing techniques may not sufficiently account for the location and orientation of edges within the image, which may lead to edge artifacts, such as aliasing ( aliasing), checkerboard or rainbow artifacts

Method used

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  • System and method for demosaicing image data using weighted gradients
  • System and method for demosaicing image data using weighted gradients
  • System and method for demosaicing image data using weighted gradients

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Embodiment Construction

[0067] One or more specific embodiments of the present disclosure will be described below. These described embodiments are merely examples of the presently disclosed technology. Furthermore, in an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any of these actual implementations, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developer's specific goals, such as compliance with Systematic and commercial restrictions. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nonetheless be a routine design, production, and fabrication undertaking of those of ordinary skill in the art having the benefit of this disclosure.

[0068] When introducing elements of the various embodiments of the present disclosure, t...

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Abstract

Various techniques are provided herein for the demosaicing of images acquired and processed by an imaging system. The imaging system includes an image signal processor 32 and image sensors 30 utilizing color filter arrays (CFA) for acquiring red, green, and blue color data using one pixel array. In one embodiment, the CFA may include a Bayer pattern. During image signal processing, demosaicing may be applied to interpolate missing color samples from the raw image pattern. In one embodiment, interpolation for the green color channel may include employing edge-adaptive filters with weighted gradients of horizontal and vertical filtered values. The red and blue color channels may be interpolated using color difference samples with co-located interpolated values of the green color channel. In another embodiment, interpolation of the red and blue color channels may be performed using color ratios (e.g., versus color difference data).

Description

technical field [0001] The present disclosure relates generally to digital imaging devices, and more particularly, to systems and methods for processing image data obtained using an image sensor of a digital imaging device. Background technique [0002] This section serves to introduce the reader to various aspects of art that are related to various aspects of the technology that are described and / or claimed below. It is believed that this discussion helps to provide the reader with background information to better understand the various aspects of this disclosure. Accordingly, these statements are to be read with the understanding that they are in this regard, and not an admission that they are prior art. [0003] In recent years, digital imaging devices have become more popular, at least in part because these devices have become more affordable to the average consumer. Also, in addition to some stand-alone digital cameras that are just coming to market, it is not uncommo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/04G06T3/40
CPCG06T3/4015H04N2209/046H04N25/683H04N25/611G06T3/40H04N23/10
Inventor G·科特J·E·弗莱德瑞克森
Owner APPLE INC
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