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Image interpolation method capable of improving image resolution and device utilizing image interpolation method

An image resolution and high resolution technology, applied in the field of image processing, can solve problems such as interpolation image defects, system model errors, inaccurate estimation of statistical information in the window, etc., and achieve the effect of minimizing estimation errors and reducing defects

Active Publication Date: 2012-05-30
PEKING UNIV +2
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Problems solved by technology

[0011] The above two algorithms assume that the image statistics remain stable in the selected window. When the feature scale of the image boundary is smaller than the window scale, this assumption is not true, so the estimation of the statistical information in the window is inaccurate, resulting in The error of the system model, which causes the interpolated image to appear flawed at the border

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  • Image interpolation method capable of improving image resolution and device utilizing image interpolation method
  • Image interpolation method capable of improving image resolution and device utilizing image interpolation method
  • Image interpolation method capable of improving image resolution and device utilizing image interpolation method

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Embodiment Construction

[0035] In order to solve the problem of blemishes on the border of the interpolated image in the prior art, an embodiment of the present invention provides an image interpolation method for improving image resolution. In the solution of this embodiment, without loss of generality, the low-resolution The pixels in the high-resolution image are regarded as obtained by regular downsampling with a factor of 2 in the high-resolution image, so these pixels can be regarded as part of the original high-resolution image, figure 1 A schematic diagram of two-pass interpolation is given. Then the task of interpolation is to interpolate the first part of high-resolution pixel points 11 and the second part of high-resolution pixel points 12 from the existing low-resolution pixel points 10 . The whole interpolation process is divided into two steps. The first step is to interpolate to obtain the first part of high-resolution pixel points 11 . The second step is to interpolate the second pa...

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Abstract

The invention discloses an image interpolation method capable of improving image resolution and a device utilizing the image interpolation method, aiming to overcome defects at boundaries of interpolated images in the prior art. The image interpolation method capable of improving image resolution includes steps of determining similarity probability weight between all pixels in a local window and the reference pixel, modulating contribution of each pixel to the integral error in optimization estimation according to the similarity probability weight, and finally calculating all the pixel values to be estimated in the local window by estimating according to the weighted least square process. Since the similarity probability weight is introduced to serve as the weight for estimation of high-resolution pixels, estimation error is minimized, and defects at the boundaries are reduced.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to an image interpolation method and device for improving image resolution. Background technique [0002] Image is one of the main carriers for human beings to obtain information from the external objective world. As human society enters the information age, computer technology, modern communication technology and information processing technology have achieved rapid development, and consumer electronics products have spread all over every corner of human life. With the emergence and wide application of digital images, people's requirements for image quality are getting higher and higher. When the hardware capabilities of image acquisition equipment are approaching the limit, using software technology to improve the original image resolution has gradually become a It is one of the hot issues in the field of digital image processing. [0003] Image interpolation is one of ...

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Application Information

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IPC IPC(8): G06T3/40
Inventor 任杰刘家瑛郭宗明
Owner PEKING UNIV
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