High dynamic-range image synthesis method and device

A high dynamic range, image synthesis technology, applied in image communication, TV, color TV components and other directions, can solve the problems of reduced calculation amount and required storage space, large and small storage space handheld devices, and reduced number of images. , to achieve the effect of reducing the amount of computation and required storage space, enriching details, and reducing the number of images

Active Publication Date: 2012-04-18
芯鑫融资租赁(厦门)有限责任公司
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Problems solved by technology

[0005] In order to overcome the shortcomings in the prior art that the number of different exposure images required is large, resulting in a large amount of computation and large storage space, which are not suitable for small handheld devices, the present invention provides a high dynamic range image synthesis method and its device , the present inven

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[0037] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0038] see figure 1 As shown, it is a flow chart of an embodiment of a high dynamic range image synthesis method provided by the present invention, which specifically includes the following steps:

[0039] Step S101, setting the exposure time of the shooting device to T1, and shooting a long exposure image of the scene.

[0040] The exposure time T1 in this step has no specific value, and the value of T1 varies according to different scenes. The size of T1 is based on the ability to correctly expose the darker parts of the scene and reflect enough details. The brighter parts of the scene are overexposed and saturated in the captured image, appearing white and shiny, with loss of detail.

[0041] Step S102, setting the exposure time of the shooting device to T2, and shooting a short exposure image of the scene.

[0042] The exposure time T2 in th...

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Abstract

The invention discloses a high dynamic-range synthetic imaging method and device, aiming at providing a method for synthesizing two pieces of images with lower dynamic ranges into a piece of image with higher dynamic range. The high dynamic-range synthetic imaging method comprises the steps of: shooting a same scene at different exposure time to obtain two pieces of different exposed images; respectively converting the two different exposed images to be in exposure value spaces according to response curves of a shooting device; weighted-synthesizing scene brightness which is calculated by utilizing exposure value and exposure time according to brightness of the two pieces of images; and simulated-exposing the synthesized scene brightness through the response curves to obtain the image with high dynamic range. According to the invention, two pieces of different exposed images are synthesized, and thus the difficulty of image alignment is reduced; moreover, the operand and the required storage space in the processing procedure are reduced, so that the high dynamic-range synthetic imaging method and device can be applied to a small-sized handheld device; and at the same time, the image with high dynamic range is rich in details at light parts and shadow parts, and the color and the details of the image are in conformity with those of the original scene.

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Application Information

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Owner 芯鑫融资租赁(厦门)有限责任公司
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