Image registration method and apparatus for terminal, and terminal

#This application is a U.S. National Stage of International Patent Application No. PCT/CN2016/077782 filed on Mar. 30, 2016, which is hereby incorporated by reference in its entirety.

#The present invention relates to image processing technologies, and in particular, to an image registration method and apparatus for a terminal, and a terminal.

#As a display technology improves, a user puts forward a higher requirement on quality of an image that is used as a display source. Because a relatively large sensor is provided on a high-end camera, a photographed image has relatively high quality. However, when the high-end camera is disposed on a mobile phone to improve image quality, a problem of a relatively thick mobile phone body usually arises due to the relatively large sensor in the high-end camera. As a result, it is inconvenient for the user to carry the mobile phone and user experience of handling is poor. To avoid the foregoing problem, more manufactures start to replace one high-end camera with two ordinary cameras, so as to improve image quality and implement more functions such as 3D image display, wide-angle photographing, noise reduction at night, and depth of field extension.

#To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show some embodiments of the present invention, and persons of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

#FIG. 1 is a schematic structural diagram of an embodiment of a terminal according to the embodiments of the present invention;

#FIG. 2 is a schematic flowchart of Embodiment 1 of an image registration method for a terminal according to the embodiments of the present invention;

#To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

#The embodiments of the present invention provide an image registration method for a terminal. Considering that a change in content of images obtained within a short time interval is relatively small, a result of registration between current images is used to provide reference for registration between next images, to increase an image registration speed. Therefore, simultaneous photographing by dual cameras can be applied to video photographing, to display a photographed image to a user in real time.

#In the embodiments of the present invention, the terminal may be a video camera, a mobile phone, a tablet computer, or the like. A specific implementation form of the terminal is not particularly limited in the embodiments of the present invention. The terminal in the embodiments of the present invention includes at least a first camera and a second camera. The first camera and the second camera are disposed side by side, work simultaneously, and photograph a current scene at a same time, so as to obtain two frames of images and transmit the two frames of images to an image registration device. The image registration device processes the two frames of images in real time and outputs a registration result. An image processor subsequently performs image processing according to the registration result and displays a processed image. The first camera and the second camera may be exactly the same, or may be cameras with different features, for example, one color camera and one B/W camera. The image registration device and the image processor may also be integrated as one apparatus. FIG. 1 is a schematic structural diagram of an embodiment of a terminal according to the embodiments of the present invention. Specifically, as shown in FIG. 1, a first camera and a second camera are independent of each other, optical axes of the first camera and the second camera are parallel to each other, and the first camera and the second camera collect images at the same time. In this way, the terminal may photograph two video sequences of a same scene, send the two video sequences to an image registration device, and obtain a result of registration between the two video sequences. In actual use, the first camera and the second camera in the terminal may be set to working simultaneously, and then an image registration method for a terminal according to the present invention is applied, to obtain a registration result. Alternatively, the first camera or the second camera may be set to working separately, and a video photographed by a single camera is directly stored or output. The following provides detailed description for the image registration method for the terminal according to the embodiments of the present invention by using specific embodiments.