Infrared image scaling method based on FPGA

An infrared image and image scaling technology, which is applied in image data processing, graphic image conversion, instruments, etc., can solve the problems of slow process and low efficiency, and achieve the effect of ensuring real-time performance.

Inactive Publication Date: 2015-02-18
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for zooming infrared images based on FPGA to solve the p...

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  • Infrared image scaling method based on FPGA

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Embodiment Construction

[0020] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] The specific implementation steps of the zooming method will be described below by taking a frame of an image with 640×512 pixels as an example and displaying a new image with a size of 1024×768 pixels transformed by a non-integer multiple. This method mainly includes the image space transformation process and the image gray level interpolation process, such as figure 1 As shown, it includes module 1 for temporal image space transformation and module 2 for image grayscale interpolation, both of which are implemented by FPGA, where module 1 includes ROM_X, ROM_Y, ROM_U and ROM_V, which are used for Store the X-direction position of the source image, the Y-direction position of the source image, the X-direction distance coefficient of the target pixel, and the Y-direction distance coefficient of the target pixel. Module 2 includes dual...

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Abstract

The invention relates to an infrared image scaling method based on an FPGA and belongs to the technical field of image reconstruction. The method includes the steps that firstly, target pixel points are reversely transformed and mapped to an original image through image spatial transformation, a relationship between the target pixel points and the original image is converted into an mif file, and an image coordinate transformation lookup table and a distance relationship lookup table are established; then, by the use of pixel values of an interpolating point among four surrounding points in the original image and a distance relationship between the interpolating point and the four adjacent pixel points, two-dimensional linear interpolation transformation is conducted on image signals, and in the interpolation transformation process, needed image data and needed system data are read through the established lookup tables for interpolation operation. The lookup tables are established through the FPGA, an image is amplified non-integer times quickly, infrared image processing instantaneity is guaranteed, the visualization effect of an image system is good, and detail observation is facilitated.

Description

technical field [0001] The invention relates to an infrared image scaling method based on FPGA, belonging to the technical field of image reconstruction. Background technique [0002] Due to the different display requirements at the back end of the infrared image system, non-integer multiple scaling is required, and most of the current scaling methods are implemented by various algorithms, and this method leads to slow and low efficiency in the entire scaling process, and cannot guarantee the accuracy of the infrared image. real-time processing. Contents of the invention [0003] The purpose of the present invention is to provide an infrared image scaling method based on FPGA to solve the problems that most of the existing scaling methods are realized by algorithm operation, resulting in slow process and low efficiency. [0004] The present invention provides a kind of infrared image scaling method based on FPGA for solving the above-mentioned technical problem, and this ...

Claims

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Application Information

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IPC IPC(8): G06T3/00
CPCG06T3/4007
Inventor 赵佳佳孙小亮刘琼
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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