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System and method for high quality image and video upscaling

A quality, pixel technology, applied in the field of image/video processing, which can solve the problems of high complexity, unapplied commercial video products, etc.

Inactive Publication Date: 2010-03-24
SONY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some proposals have shown impressive results on selected applications, they have not been applied in commercial video products due to high complexity and some unrealistic assumptions

Method used

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  • System and method for high quality image and video upscaling
  • System and method for high quality image and video upscaling
  • System and method for high quality image and video upscaling

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Embodiment Construction

[0017] A low-complexity upscaling method to generate higher resolution images and videos with high quality is described here. To achieve the goal, attention will be paid to maintaining natural edge smoothness and sharpness, eliminating overshoot artifacts and "edge blowing" problems. To achieve edge smoothing and remove jagged artifacts along edges, bi-directional filtering based on two orthogonal directions is used to generate higher resolution pixels. Directions closer to edge directions are weighted more heavily, while directions farther from edge directions are weighted less. The weight of each direction is determined by the developed direction vector difference measurement method. In order to remove overshooting artifacts and solve the problem of rough edges, a bilateral interpolation method is implemented. By using a two-sided interpolation method, the interpolation result is pushed to the desired position of the dominant transition. As a result, overshoot artifacts a...

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Abstract

The invention discloses a system and method for high quality image and video upscaling. A low complexity upscaling method to generate higher resolution image and video with high quality is described herein. Natural edge smoothness and sharpness are preserved while overshooting artifacts and the 'edge dilation' problem are eliminated or at least reduced. To obtain edge smoothness and remove jaggy artifacts along the edge, a bi-directional filtering which is based on two orthogonal directions is used to generate higher resolution pixels. The direction close to the edge direction is heavily weighted, and the direction far from the edge direction is lightly weighted. The weight of each direction is determined by the developed directional vector difference measurement method. To reduce the overshooting artifacts and solving the thick edge problem, a dual-sided interpolation method is implemented. By using the dual-sided interpolation method, the interpolation result is pushed towards a dominant transition desired location which removes overshooting artifacts. A thin and sharp edge is obtained instead of a blurred, thick edge.

Description

technical field [0001] The invention relates to the field of image / video processing. More specifically, the present invention relates to enhancing image / video processing by upscaling. Background technique [0002] Upscaling or resolution enhancement is an important fundamental technique in image and video processing. With upscaling, a higher resolution image or video can be generated from an acquired lower resolution image or video. Previously, the focus was on producing high-quality still images. Applications exist in medical imaging, digital photography, and others. With the advent of online video entertainment and the adoption of large-screen TVs in more and more homes, low-complexity video upscaling has become increasingly important. For example, technology that allows televisions to produce high-definition-like effects from DVD content is highly desirable. [0003] Since upscaling is the basis for many image processing applications, it has been studied for many yea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14H04N7/01
CPCG06T3/403
Inventor 张希敏刘明常
Owner SONY CORP