Automatic white balance method of vehicle traveling records in tunnel entering/leaving or traveling at night
An automatic white balance and driving record technology, which is applied to instruments, character and pattern recognition, color signal processing circuits, etc. Ensuring accurate records and highly recognizable results
Inactive Publication Date: 2019-03-26
RES INST OF SUN YAT SEN UNIV & SHENZHEN
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Problems solved by technology
The main problem to be solved by the scheme of the present invention is that the conventional white balance scheme takes a long time, consumes a lot of computing resources, and has poor timeliness in the case of ultra-high resolution, drastic light changes, and single image color in the existing methods.
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[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0027] figure 1 It is the overall flowchart of the white balance method in the embodiment of the present invention, such as figure 1 As shown, the method includes:
[0028] S1. Obtain the current frame of the driving record, and calculate the morphological similarity of the RGB channel histogram of the current frame. If the similarity is high, execute S2, otherwise execute S3;
[0029] S2, according to the similarity of RGB channel histograms, if the histogram s...
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The invention discloses an automatic white balance method of vehicle traveling records in tunnel entering / leaving or traveling at night. The method is based on an automatic white balance algorithm improved by histogram matching, tunnel entering / leaving or traveling at night is distinguished according to judging a similarity degree of image RGB channel histograms, an algorithm of correction of white balance is automatically selected, the problem that performing of automatic white balance of existing algorithms in cases where real environment condition changes are acute and color contents are single is not good is overcome, highly efficient real-time automatic correction on the white balance of video images is realized, a vehicle traveling recorder is enabled to record contents with higher recognition degrees even in processes of tunnel entering / leaving and vehicle traveling at night, and accurate recording of vehicle traveling data is ensured.
Description
technical field [0001] The invention relates to the fields of computer vision and video image processing, in particular to an automatic white balance method for driving records when entering and exiting tunnels or driving at night. Background technique [0002] When human eyes observe an object, the properties of the current light source can be used to adjust the color of the observed object. However, when an object is photographed by an imaging device such as a digital camera, it is often difficult to realize a general automatic white balance function. Generally speaking, for digital camera equipment, it is the white balance module of the equipment that performs the color restoration operation on white objects. Today, with the widespread use of digital camera technology, people need white balance to solve the problem of color distortion of images. [0003] White balance is a process of removing abnormal colors. Under various color temperatures, the color of the target ob...
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IPC IPC(8): H04N9/73G06K9/62
CPCH04N9/73G06V10/758G06F18/22
Inventor 苏航李召国张怡
Owner RES INST OF SUN YAT SEN UNIV & SHENZHEN