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Image full-screen anti-aliasing method and device for head-up display characters

An anti-aliasing, picture technology, applied in the field of image processing, can solve the problems of distortion, picture edge twist, poor line uniformity of HUD picture, etc., to achieve high real-time performance, simple method, and improve the effect of poor line uniformity

Active Publication Date: 2016-04-20
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

[0004] The purpose of the present invention is to provide a full-screen anti-aliasing method and device for HUD character images to solve the problems of poor line uniformity and twisted edges of the existing HUD images.

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  • Image full-screen anti-aliasing method and device for head-up display characters
  • Image full-screen anti-aliasing method and device for head-up display characters
  • Image full-screen anti-aliasing method and device for head-up display characters

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Embodiment Construction

[0034] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] Embodiment of a full-screen anti-aliasing method of a head-up display character picture of the present invention

[0036] The present invention first uses the correlation between adjacent pixels to divide the low-frequency flat area and high-frequency edge area of ​​the image; then performs anti-aliasing processing on the high-frequency edge area of ​​the image, and delays the output of the low-frequency flat area of ​​the image; finally uses the nonlinear correction curve to The whole character picture is transformed into grayscale. The concrete implementation steps of this method are as follows:

[0037] 1. Use the correlation between adjacent pixels to divide the low-frequency flat area and high-frequency edge area of ​​the head-up display image.

[0038] A. First, slide the n*n template window in sequence according to the VESA t...

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Abstract

The invention relates to an image full-screen anti-aliasing method and a device for head-up display characters and belongs to the technical field of image processing. The low-frequency flat area of an image and the high-frequency marginal area of the image are differentiated based on the correlation of adjacent pixels. The high-frequency marginal area of the image is selectively subjected to the anti-aliasing treatment based on a weighted Gaussian filtering function. In this way, the uniformity of displayed image lines is ensured, while the defect that an overall image is darker and lower in contrast ratio based on the traditional non-content-based anti-aliasing algorithm can be overcome. Moreover, based on the fact that the images of head-up display characters are rich in high-frequency components and severe in gray discretization, the contrast ratio is improved based on a nonlinear calibration curve. According to the invention, the phenomenon that lines in an original image of a head-up display character are poor in uniformity and the edge of the image is twisted can be effectively improved. The display effect of the overall image of the head-up display character is improved and the real-time performance is high. The entire processing process is shorter than three thousandths of the duration of a whole-frame image. The influence of the system delay is small. The method is simple and easy in hardware implementation.

Description

technical field [0001] The invention relates to a full-screen anti-aliasing method and device for a head-up display character picture, belonging to the technical field of image processing. Background technique [0002] The C919 head-up display and other fighter digital head-up displays widely use large field of view optical equipment, which has significant advantages such as wide viewing range and high resolution. However, due to the large off-axis angle of the objective lens of this type of equipment, the display screen is severely distorted, causing specific changes in the size and shape of the image, which reduces the display quality and display accuracy. Therefore, pre-distortion technology based on bilinear interpolation is generally used in digital head-up displays at the present stage to preprocess images to eliminate distortion of the optical system. However, the distortion correction system based on the traditional bilinear interpolation algorithm does not judge th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T1/60
CPCG06T1/60G06T2207/20192G06T5/73
Inventor 张川郭伟郑永瑞
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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