Shooting distance based distortion correction method and mobile terminal
A mobile terminal and distortion correction technology, which is applied in the field of image processing, can solve the problems of affecting the results, affecting the visual effect of collected images, reducing the measurement accuracy of cameras, etc., and achieving the effect of correcting distortion
Inactive Publication Date: 2015-10-28
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology
The existence of distortion not only affects the visual effect of the collected images, but also if it is directly applied to industrial close-range measurement, it will reduce the measurement accuracy of the camera, thereby affecting the results
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[0049] Embodiments of the present invention provide a distortion correction method based on a shooting distance and a mobile terminal, which are used to correct distortion of an image captured by a lens with a large viewing angle to a certain extent.
[0050]In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0051] Each will be described in detail below.
[0052] The terms "first", "secon...
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The present invention discloses a shooting distance based distortion correction method. The method comprises: acquiring an image shot by a large-view-angle lens of a mobile terminal; acquiring areas of N to-be-corrected images corresponding to N photographic objects in the image, wherein N is an integer greater than 1; acquiring a distance between the N photographic objects and the mobile terminal; dividing the N to-be-corrected images into W pixel grids in the same size as a pre-stored grid template, wherein W is an integer greater than N; and performing, according to the distance between the N photographic objects and the mobile terminal and the pre-stored grid template, distortion correction on the W pixel grids to obtain a correction image. An embodiment of the present invention further provides a mobile terminal. By adopting the embodiments of the present invention, distortion of an image shot by using the large-view-angle lens can be corrected to some extent.
Description
technical field [0001] The present invention relates to the technical field of image processing, in particular to a distortion correction method based on shooting distance and a mobile terminal. Background technique [0002] Due to the physical nonlinear characteristics of the camera lens, it will inevitably cause the distortion of the shape of the object on the image during the imaging process. The specific manifestations can be divided into pincushion distortion, barrel distortion and linear distortion. The existence of distortion not only affects the visual effect of the collected images, but also if it is directly applied to industrial close-range measurement, it will reduce the measurement accuracy of the camera and affect the results. Compared with ordinary lenses, the distortion of wide-angle lenses is larger, because the distortion is only related to the height of the object (or the size of the field of view). Compared with ordinary lenses, the field of view of wide-...
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IPC IPC(8): G06T5/00
Inventor 李龙佳
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD