Method for correcting barrel distortion image and device thereof
A technology for barrel distortion and image correction, applied in the field of image processing, can solve the problems of low cost, small storage space and large storage space of cmos image sensor
Active Publication Date: 2013-01-30
BYD SEMICON CO LTD
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[0027] From the above analysis, it can be seen that although the method for correcting image barrel distortion in the prior art can correct image barrel distortion relatively well, it needs to store the image with barrel distortion in advance, which requires a large amount of storage. Therefore, the existing methods are implemented in digital signal processing (DSP) with large storage space, and the cost of cmos image sensor (CIS) with storage function is very low, but the storage space is too small
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[0055] In order to solve the problems existing in the prior art, the present invention proposes a method for correcting the barrel distortion of the image. Firstly, the acquired image is inserted into the row and column data, and then the storage unit inserts the row and column data into the serially input image. Part of the images are stored in sequence, and finally the matrix data blocks in the part of the images are corrected sequentially to obtain the final corrected image. This method can effectively correct the barrel distortion of the image on the basis of reducing the storage space.
[0056] Before introducing the specific implementation scheme, first introduce the concept of the red-green-blue (RGB) color model. The RGB color model is a color standard in the industry. Various colors are obtained by changing the three color channels of R, G, and B and superimposing them on each other. Therefore, for each image in the image Pixels can be represented by three components ...
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The invention discloses a method for correcting barrel distortion image, comprising: inserting row / column data into collected image to obtain the image with inserted row-column data; the image with inserted row-column data is input in serial, and part of the image is stored into a storage unit; correcting and outputting an image data in the storage unit, continuing storing the non-stored image data in the image with inserted row-column data which is input in serial, repeatedly conducting correcting, outputting, continuing storing process in the step, until outputting all the image data in the image with inserted row-column data, lastly, the corrected image is obtained. The invention also discloses a device for correcting barrel distortion image. The application of the method and the device provided by the invention not only can effectively correct the barrel distortion image based on reducing storage space, but also can correct the barrel distortion image in CIS of small storage space and low cost and save cost.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for correcting image barrel distortion. Background technique [0002] Wide-angle lenses are widely used in the field of photography due to their wide viewing angles. However, when using wide-angle lenses, there will be a phenomenon that the imaging picture caused by the lens is in a barrel-shaped expansion, that is, barrel-shaped distortion, which will seriously affect the actual shooting effect. , so it is necessary to correct the barrel distortion of the image. [0003] At present, there are many methods for correcting image barrel distortion, such as control point method and mode method, etc. figure 1 It is a flowchart of an embodiment of an image barrel distortion correction method in the prior art, and the method includes the following steps: [0004] Step 101: Store images with barrel distortion. [0005] Before correcting the image with barr...
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IPC IPC(8): H04N1/387
Inventor 宋敏彭茂肖本懿
Owner BYD SEMICON CO LTD