Digital image scaler for saving hardware resource

A digital image and hardware resource technology, applied in image data processing, graphics and image conversion, instruments, etc., can solve the problems of reducing the real-time processing ability of the system and increasing hardware resources, so as to improve work efficiency, save hardware resources, and reduce multiplication The effect of the number of

Inactive Publication Date: 2009-01-28
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

If a high-order interpolation algorithm is used, although it can improve the quality of the zoomed image, it will greatly increase the hardware resources and reduce the real-time processing ability of the system.

Method used

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  • Digital image scaler for saving hardware resource
  • Digital image scaler for saving hardware resource
  • Digital image scaler for saving hardware resource

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Embodiment Construction

[0021] The specific embodiment of the present invention is as figure 1 As shown, it is mainly composed of an interpolator module 1 and a position coefficient generation module 2.

[0022] Taking the factorization result of formula (2) as an example, the specific implementation of the interpolator is as follows figure 2 shown. Among them, registers 3, 4, 5, and 6 are responsible for temporarily storing the input data, and the temporarily stored data are g 0 , g 1 , g 2 , g 3 ; Adders 7, 8, 9, 10, 11, 12, 13, 14 are responsible for completing 8 addition and subtraction operations in the interpolation algorithm; multipliers 17, 18 are responsible for completing the operations related to μ k Two multiplication operations; the shift adder 15, 16 is responsible for completing two fixed coefficient multiplication operations. The order of execution is shown in the figure, and the timing of the operation is controlled by the drive clock of registers 3, 4, 5, and 6.

[0023] Pos...

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Abstract

The invention relates to a digital image scaler for saving hardware resources, belonging to the video image processing field. The image scaler comprises an interpolator module and a coefficient generation module. A concrete connection mode comprises the following steps that: original image data and clock signals are input to the interpolator module; under the action of an external clock, the coefficient generation module generates a position coefficient needed in interpolation operation, and the coefficient is input into the interpolator module as well; the interpolator module carries out the interpolation operation according to the input original image data and the interpolation position coefficient; and then the interpolator module outputs an image processed by the interpolation operation. The scaler is based on the hierarchical factorization of scaling algorithm, remarkably reduces the quantity of multipliers, only needs an accumulator, a register and a corresponding auxiliary control unit as hardware resources, and is applicable to the scaling in any proportion. The image scaler adopting a multi-stage interpolation algorithm can complete the image scaling functions in any proportion.

Description

Technical field: [0001] The invention belongs to the field of video image processing, and proposes a digital image scaler which significantly saves hardware resources. Background technique: [0002] Flat-panel displays gradually occupy a dominant position in display terminal equipment, but their optimal resolution is a fixed value, that is, their physical display pixels, and different display devices have different physical display pixels; at the same time, digital TV or computer The input image resolution is also variable, which requires an image scaling engine to map input images of different resolutions to the flat panel display. [0003] In order to realize real-time processing, the traditional digital image scaler usually adopts two-point interpolation algorithm. This method obtains the weight of the two points by calculating the interpolation position of the interpolation point in the horizontal or vertical direction of the original image, and then calculates the imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
Inventor 王德江匡海鹏
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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