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System and method for realizing non-linear zoom of video image

A video image, non-linear technology, applied in the parts of TV system, image communication, parts of color TV, etc., can solve the problems of difficult control and complex implementation, and achieve the effect of simple method

Active Publication Date: 2015-03-04
ARKMICRO TECH
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Problems solved by technology

Although this method can achieve the effect of nonlinear scaling, the implementation is more complicated, and at the junction of blocks, quadratic curves need to be seamlessly connected, which is not easy to control

Method used

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  • System and method for realizing non-linear zoom of video image
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Embodiment Construction

[0033] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] Such as figure 2 Shown is the characteristic curve C(t) of the cosine function, let A be the amplitude of the cosine curve, and B be the bias of the cosine function, that is, the average value.

[0035] C(t)=Acos(2π·t / T)+B (1)

[0036] In this specific embodiment, the similarity between the cosine function and the nonlinear scaling to be realized in the present invention is used, and the cosine function is superimposed on the step size of the linear scaling to obtain the step size of the nonlinear scaling, thereby realizing the nonlinear scaling of the image. Such as image 3 Shown is the structural block diagram of the video image non-linear scaling system described in this embodiment, the scaling system includes a cosine function generator 301, a step size calculation module 302, a step size accumulator 303, and an interpolator 304...

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Abstract

The invention discloses a system for realizing non-linear zoom of a video image. The system is characterized by comprising a cosine function generator, a step length calculation module, a step length accumulator and an interpolator. In the invention, a cosine function amplitude is input into the cosine function generator to obtain an output value, the output value and linear step length are input into the step length calculation module to obtain non-linear step length, the non-linear step length is inputted into the step length accumulator to obtain position information of an interpolation point, the position information and an original pixel point are input into the interpolator, and an interpolation is output according to a selected interpolation algorithm to obtain a pixel point value. The invention also discloses a method for realizing non-linear zoom of a video image based on the system for realizing non-linear zoom of a video image. By utilizing the system and method for realizing the non-linear zoom of the video image, the features of a cosine curve are utilized, and a non-linear zoomed curve is fitted, so as to well realize the non-linear zoom of the video image and the smooth transition of each zoomed area.

Description

technical field [0001] The present invention relates to a video image processing system and method, in particular to a method and system for zooming and processing video images. Background technique [0002] Image scaling is a technique commonly used in video or image display systems. Since the resolution of the display device is different from that of the input original image, the original image needs to be enlarged or reduced to fit the output display device. When the length and width of the image are scaled in equal proportions, the effect is the best. For example, if the image with a resolution of 640×480 is enlarged to 1024×768, the length and width of the image will be enlarged by 1.6 times. However, it often happens that the aspect ratio of the display device is different from the aspect ratio of the input image. For example, movie screens and many large-screen TVs currently use a 16:9 display format, while traditional computer or TV images use a 4:3 format. When a 4...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/14
Inventor 李琛林晓伟严卫健石岭
Owner ARKMICRO TECH
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