Wide-angle image correction method and system
A wide-angle image and correction method technology, which is applied in the field of wide-angle image correction methods and systems, can solve problems such as distortion and uncorrected
Active Publication Date: 2012-09-19
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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[0003] The traditional correction method based on perspective projection transformation can well correct the distorted straight line in the wide-angle image, but the shape of the object in the wide-angle image is still not corrected, but there will be greater distortion, especially after correction the border of the image
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[0054] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.
[0055] Such as figure 1 The wide-angle image correction method of an embodiment shown includes the following steps:
[0056] S10. Acquire a wide-angle image.
[0057] In this embodiment, images may be received from a wide-angle lens.
[0058] S20. If the wide-angle image is a color image, convert the wide-angle image into a grayscale image.
[0059] If the wide-angle image is a color image, it needs to be converted to a grayscale image.
[0060] If ...
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The invention discloses a wide-angle image correction method and a wide-angle image correction system. The method comprises the following steps of: acquiring a wide-angle image; if the wide-angle image is a color image, converting the wide-angle image into a grayscale image; simulating the wide-angle image by using an ellipsoidal model, setting a threshold value T, obtaining the number N of pixels greater than T in the grayscale image, setting the long axis a and short axis b of an ellipsoid, and calculating the center (x0, y0, 0) and radius R of the ellipsoid according to N; setting a default depth value z, and solving pixel coordinates (u, v) in the wide-angle image corresponding to pixel coordinates (x, y) in a corrected image; and regulating vertical offset Deltau and horizontal offset Deltav to obtain a corresponding corrected image, and displaying the corrected image. Compared with the conventional perspective projection transformation, the wide-angle image correction method has the advantage of better minimizing the distortion of the wide-angle image by regulating the parameters of threshold value T, long axis a, short axis b, depth z, vertical offset Deltau, horizontal offset Deltav and the like of the ellipsoid.
Description
technical field [0001] The invention relates to the field of image correction, in particular to a wide-angle image correction method and system. Background technique [0002] In order to be able to see a wider field of view in one picture, people put forward higher requirements for the imaging system. However, more fields of view means more bending of light, and the shape of objects and straight lines in the image will be bent or deformed. For this reason, in order to correct wide-angle images, some image correction algorithms came into being. [0003] The traditional correction method based on perspective projection transformation can well correct the distorted straight line in the wide-angle image, but the shape of the object in the wide-angle image is still not corrected, but there will be greater distortion, especially after correction the border of the image. Contents of the invention [0004] Based on this, a wide-angle image correction method and system for minim...
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IPC IPC(8): G06T5/00
Inventor 朱坛超刘平张贺晔王平安
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI