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Bilinear two-fold upsampling method and system thereof

A bilinear technology to be sampled, which is applied in the fields of video codec and image processing, can solve the problems of low sampling efficiency, slow speed, and time-consuming, etc., and achieve the effects of reducing calculation time, speeding up sampling speed, and improving efficiency

Inactive Publication Date: 2013-07-17
PEKING UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing bilinear upsampling method is a general method for multiple upsampling, which uses multiplication to calculate the sampling results. Since the multiplication calculation is time-consuming and slow, the sampling efficiency is low

Method used

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  • Bilinear two-fold upsampling method and system thereof
  • Bilinear two-fold upsampling method and system thereof
  • Bilinear two-fold upsampling method and system thereof

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0024] figure 1 A structural block diagram of the bilinear twice upsampling system in this embodiment is shown. The system includes a buffer device 12 , an input device 11 connected to the buffer device 12 and a sampling device 13 , and an output device 14 connected to the sampling device 13 .

[0025] The cache device 12 is used to apply for a buffer area. In this embodiment, four buffer areas are applied for, which are respectively named as the first buffer area (O buffer area), the second buffer area (H buffer area), and the third buffer area (V buffer area). ) and the fourth buffer (HV buffer). The O buffer is used to cache the image to be sampled, the H buffer is used to cache the pixels obtained by horizontal pixel sampling, the V buffer is used to cache the pixels obtained by vertical pixel sampling, and the HV buffer is used to cache th...

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Abstract

The invention, which belongs to the technology fields including image processing as well as video coding and decoding and the like, discloses a bilinear two-fold upsampling method and a system thereof. In the prior art, a bilinear upsampling mode has a low efficiency. According to the method, four buffer areas are applied, wherein the four buffer areas include a first buffer area, a second bufferarea, a third buffer area, and a forth buffer area; a to-be-sampled image is input into the first buffer area; traversal is carried out on the to-be-sampled image as well as transverse pixel sampling, vertical pixel sampling and adjacent tetra-pixel sampling are respectively carried out on the to-be-sampled image; a transverse pixel sampling result is stored into the second buffer area, a vertical pixel sampling result is stored into the third buffer area and an adjacent tetra-pixel sampling result is stored into the fourth buffer area; and pixels in the four buffer areas are arranged interlacedly and then an image after the sampling is output. According to the invention, the method and the system are mainly utilized for carrying out bilinear two-fold upsampling processing on an image.

Description

technical field [0001] The invention belongs to the technical fields of image processing, video encoding and decoding, etc., and specifically relates to a bilinear twice upsampling method and system. Background technique [0002] In recent years, with the continuous development of image processing and video codec technology, people have higher and higher requirements for the flexibility of image and video presentation. For example, zooming in and out of images, stretching and compressing videos, all of which involve up-down sampling technology. Especially in scalable video coding, up and down sampling is required inside the codec to support the feature of spatial scalability. [0003] Image upsampling is the process of producing a higher resolution from a lower resolution image, that is, increasing the image resolution. There are many kinds of upsampling techniques, from the simplest nearest neighbor sampling to the more complex Lanczos sampling. Nearest neighbor sampling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/46H04N19/132H04N19/587
Inventor 颜乐驹孙俊郭宗明肖建国
Owner PEKING UNIV