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image scaling method

An image scaling and image technology, applied in the field of image processing, can solve the problems of high efficiency of image scaling algorithm, difficult real-time and fidelity of the algorithm, and achieve the effect of reducing complexity, reducing time consumption and ensuring fidelity

Active Publication Date: 2018-10-16
SHANGHAI INST OF ELECTROMECHANICAL ENG
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AI Technical Summary

Problems solved by technology

It is difficult for these algorithms to meet the requirements of real-time and fidelity at the same time, especially for large-scale and high-frame-rate infrared scene simulation, which requires higher efficiency of image scaling algorithms

Method used

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Embodiment Construction

[0031] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] figure 1 It is a flowchart of a fast and realistic image zooming method according to an embodiment of the present invention.

[0033] In step 101, the program passes the parameters ( Srx, Sry, Sw, Sh ), ( Trx, Try, Tw, Th ), calculate the image zoom ratio. in, Srx, Sry, Trx, Try Represents the resolution of the source image and the target image in the x and y directions, respectively, Sw, Sh, Tw, Th Respectively represent the horizontal and vertical dimensions of a single pixel in the source image and the target image. According to the above parameters, the zoom ratio of the image can be obtained as:

[0034] (8)

[0035] in, Mx and My Indicates the horizontal and vertical zoom ratios of the image, respectively.

[0036] In step 102, if figure 2 Shown coordinates the pixel position, the specific method is a...

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Abstract

An image scaling method comprises the following steps: firstly, reading a gray image of an infrared target, taking the gray image as a source image and an image obtained by magnifying / reducing the source image as a target image, and calculating the sizes of the source image and the target image to get the image magnifying / reducing ratio; secondly, converting the positions of the pixels in the source image and in the target image into coordinates; thirdly, working out the corresponding coordinate position of each pixel in the target image in the source image according to the magnifying / reducing ratio, and working out the pixel corresponding to the coordinate; and finally, judging whether the pixels in the source image are on the edge of the image through an improved edge check method, using a bilinear interpolation method to calculate the gray value of the corresponding pixel in the target image if a pixel in the source image is an edge pixel, or, directly giving the gray values of the pixels of the source image to the corresponding pixels of the target image. The real-time performance of the image scaling algorithm is improved effectively, and the fidelity of images is ensured. The image scaling method can be widely applied to an infrared imaging simulation system.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a rapid and realistic zooming method of infrared images that can support semi-physical / full digital simulation of infrared imaging. Background technique [0002] Infrared scene dynamic real-time generation technology is a key technology in the infrared imaging hardware-in-the-loop / full digital simulation system, which uses the computer to generate realistic infrared detector field of view images in real time. Real-time performance is the key and basic requirement of infrared scene dynamic real-time generation technology, which is related to the overall simulation accuracy and reliability of the simulation system. In order to generate realistic infrared images in real time, the literature "Research on External Rendering Method for Infrared Imaging Simulation" (Lu Zhifeng, Wang Chuncai et al., Computer Simulation, Vol. 24, No. 9, pp. 206-209, 2007) reported an external rendering met...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40G06T7/13
Inventor 洪泽华陆志沣张励李艳红赖鹏张佳君赵海生
Owner SHANGHAI INST OF ELECTROMECHANICAL ENG