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Luminance correction

A brightness correction and image technology, applied in the field of image processing, can solve the problem that the details of the deblurred image are not as good as the ground truth, and cannot provide sufficient image quality

Inactive Publication Date: 2010-04-28
MICROSOFT TECH LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique requires additional hardware support, and the deblurred image still does not have as good a level of detail as the ground truth
[0010] Therefore, existing solutions cannot provide sufficient image quality

Method used

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  • Luminance correction
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Examples

Experimental program
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Effect test

Embodiment Construction

[0037] Techniques for improving the quality of blurry or underexposed images (eg, due to dim lighting conditions, the presence of high-speed motion scenes, or camera shake) are described below. Take two photos of the same scene at different exposure intervals. As a result, one image may be underexposed while another may be blurred. Use the information from these two images to provide a high-quality image of the scene without noticeable blur or darkness. For example, two photos can be taken at a short interval to ensure that the center of the image does not move significantly or to limit the effects of motion caused by movement of objects in the scene or camera motion. These techniques can be easily extended to process high-contrast scenes to reveal precise details in saturated regions (as will be seen with reference to Figure 22-25 as discussed).

[0038] Additionally, some of these techniques can be incorporated directly into a digital camera. For example, a digital came...

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PUM

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Abstract

The invention provides techniques for improving image quality of a blurred image or an underexposed image. In one embodiment described herein, a method includes providing two images of a same scene. This method obtains a spatial coherence and color statistical data of the two images. The image quality of any one of the two images is obtained using the obtained color statistical data and the spatial coherence.

Description

(1) Technical field [0001] The present invention relates generally to image processing, and more particularly to brightness correction. (2) Background technology [0002] When a scene is shot, light emanating from objects in the scene is recorded on film, such as conventional film or digital film. Therefore, photography involves the recording of these rays. When the lighting conditions are not suitable (eg, when shooting in low light), the photos lack certain scene information compared to photos taken under sufficient lighting conditions. [0003] Taking satisfactory photos in dim lighting conditions has historically created a very difficult problem. Images tend to be blurry or underexposed. Underexposure is usually caused by the film not being exposed in sufficient light. Underexposure can be corrected to some extent by exposing the film for a longer period of time, for example, by using a slower shutter speed to keep the shutter open for a longer period of time. Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/50H04N5/235G06T1/00G06T5/00G06T5/40H04N1/407H04N1/46H04N1/60
CPCH04N5/2355G06T5/50H04N5/23229H04N5/35581G06T2207/10144G06T5/009H04N5/217G06T5/40G06T2207/10024H04N23/81H04N23/80H04N23/741H04N25/589G06T5/92H04N23/70
Inventor 沈向洋孙剑贾佳亚
Owner MICROSOFT TECH LICENSING LLC