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Method of pantography according to scale for digital image in embedded system

An embedded system, scaling technology, applied in the components of the TV system, image communication, image data processing and other directions, can solve problems such as image quality degradation

Inactive Publication Date: 2004-03-24
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the image scaling technique by a small amount of processing still has many problems due to the degradation of the scaled image quality, and it requires a large amount of processing even if the degradation of the image quality is taken into consideration.

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  • Method of pantography according to scale for digital image in embedded system
  • Method of pantography according to scale for digital image in embedded system
  • Method of pantography according to scale for digital image in embedded system

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Embodiment Construction

[0039] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, descriptions of well-known functions and configurations are omitted for the sake of concise description of the present invention.

[0040] The present invention provides an image scaling method for enlarging or reducing an image, as shown in Figure 2, wherein the source image and the target image are divided horizontally and vertically into the same amount for each side according to the scaling ratio , and the scaling process is performed continuously one by one on the divided units. A unit divided in the present invention is called a "minimum processing unit", and a block defined by a square whose side is the length of one minimum processing unit of the source image is called a "minimum processing block". The size of the smallest processing unit is determined by the greatest common divisor of the source and destinat...

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Abstract

Provided is a digital image scaling method capable of reducing the operation quantity while minimizing the deterioration of image quality. This system comprises a process for determining the sizes of minimum processing units of a source image and a target image so as to transversely and longitudinally divide the target image and the source image to the same number of minimum processing units according to a scaling ratio of source image to target image; a process for determining a weighted value of integer corresponding to an equally divided point between two adjacent pixels of the source image, belonging to 0-2n(n is a natural number) and giving a weighted value sum of the two pixels of 2n; and a process for generating the target image by using the source pixel value in which the target pixel value of each of the minimum processing units of the target image corresponding to the minimum processing units of the source image is reflected to the target pixel value and a weighted value corresponding to the distance from this source pixel.

Description

technical field [0001] The present invention relates generally to methods of scaling digital images, and more particularly to methods of scaling digital images, ie, methods for reducing or enlarging digital images for display in embedded systems. Background technique [0002] With the generation of digital images, digital images of various sizes and shapes of digital image devices have been commercialized and introduced. Digital image devices such as digital TV, HDTV (High Definition Television), PDA (Personal Digital Assistant), IMT-2000 (International Mobile Telecommunications-2000) terminals, etc. provide clear images that conventional analog image devices cannot provide, And also provides various image processing functions such as division, enlargement, reduction, image smoothing, etc., which may only be possible through digital image processing. [0003] Many system resources are required to implement the various digital image processing functions described above. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G09G3/20H04N1/387H04N1/393
CPCG06T3/4023G06T3/40
Inventor 李和纯李承彻
Owner QUALCOMM INC