Contraction of digital image circuit with adjustable proportion and accuracy

A digital image and high-precision technology, which is applied in the field of realizing digital image scaling circuits, can solve problems such as difficult hardware implementation and complex digital image logic, and achieve the effect of good continuous scaling effect, high data accuracy, and easy realization

Inactive Publication Date: 2008-10-15
昆山杰得微电子有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the scaling of digital images with a bicube continuous ratio is often logically complex, and it is not easy to implement with hardware.

Method used

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  • Contraction of digital image circuit with adjustable proportion and accuracy
  • Contraction of digital image circuit with adjustable proportion and accuracy
  • Contraction of digital image circuit with adjustable proportion and accuracy

Examples

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Embodiment Construction

[0013] A method for realizing a digital image zooming circuit for adjusting ratio and precision of the present invention is a two-dimensional transformation. Such as figure 1 As shown, it includes the following steps, first perform horizontal transformation, then perform line data caching and accumulation, and finally perform vertical transformation;

[0014] The horizontal direction transformation can realize the scaling transformation of the three channels in the horizontal direction. According to the image transmission format in the usual chip, its input includes: frame synchronization (Vsync), row synchronization (Href), row conversion ratio (Hratio[7:0]), output image width (CropWidth[11:0]), input Image width (InWidth[11:0]), starting transform position (CropX[8:0]), and input data for one channel (InData[7:0]). Such as figure 2 As shown, when zooming in the horizontal direction, the state machine is first in the no-point state. When the input is valid (valid refers...

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Abstract

A method for realizing adjustable proportion and accuracy of digital image contraction and enlargement circuit includes recording valid data number by state machine in horizontal direction transform, outputting result and recording outputted data number by relevant counter when inputted valid data has three points; outputting result and recording outputted data number by relevant counter in column data buffer storage when inputted valid data is three columns; and obtaining three valid data each time in vertical direction transform.

Description

technical field [0001] The invention relates to a method for realizing a digital image scaling circuit, in particular to a method for realizing a digital image scaling circuit for adjusting ratio and precision. Background technique [0002] At present, the application of image processing in chip design is more and more extensive, such as: digital camera, digital video camera, mobile phone, conference video system and so on. The image processing basically includes several parts of preprocessing, compression and postprocessing. In pre-processing and post-processing, the function of image scaling is necessary and common. The scaling function of digital image often requires the performance of scale continuous. However, the scaling of digital images with continuous ratios is often logically more complex, so a simple and easy circuit design is required in chip design. [0003] The commonly used methods of digital image scaling are linear, bilinear, bicubic and so on. However, ...

Claims

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Application Information

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IPC IPC(8): G06T3/40
Inventor 欧阳合戴一村原钢汪永宁
Owner 昆山杰得微电子有限公司
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