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Method and system for scaling compressed image frames

A technology for compressing images and zooming, which is applied in stereoscopic systems, image communication, image coding, etc., and can solve problems such as broken coding, reduced image quality, and unacceptable

Inactive Publication Date: 2011-12-07
SENSIO TECHNOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scaling actually breaks the encoding (decimation mode), so that when decompressed, the resulting image is of degraded and unacceptable quality, no matter what scaling method is used

Method used

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  • Method and system for scaling compressed image frames
  • Method and system for scaling compressed image frames
  • Method and system for scaling compressed image frames

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Embodiment Construction

[0019] As described below, the present invention relates to methods and systems for scaling frames of a compressed image stream.

[0020] It should be understood that the expressions "decoding" and "decompression" are used interchangeably in this description, as are the expressions "encoding" and "compression". Furthermore, although examples of implementations of the present invention will be described herein with reference to three-dimensional stereoscopic images, such as movies, it should be understood that the scope of the present invention encompasses other types of video images as well.

[0021] Figure 1 shows a simplified computer architecture 100 for processing compressed image streams according to the prior art. As shown, video processor 106 receives compressed image stream 102 from source 104 . Source 104 may be any of a variety of devices that provide a compressed (or encoded) digitized video bitstream, such as a DVD drive or wireless transmitter, among others. Vid...

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Abstract

A method and system for scaling frames of a compressed image stream, each frame including a mosaic of pixels. For each frame of the encoded image stream, the even-numbered lines of the frame are scaled as a first grouping of lines, while the odd-numbered lines of the frame are scaled as a second grouping of lines. This grouping of the lines of the frame may occur within the frame itself or by dividing the frame into sub-frames, in which case the even-numbered lines of the frame are scaled independently from the odd-numbered lines of the frame and a scaled version of the frame is then generated by merging the scaled even-numbered lines of the frame with the scaled odd-numbered lines of the frame.

Description

technical field [0001] The present invention relates to the field of image scaling, and more particularly, to the scaling of compressed image frames. Background technique [0002] Image scaling is commonly used in computer graphics to resize digital images. Since the scaling process involves a trade-off between efficiency, smoothness, and clarity, it cannot be ignored. As the size of the image increases, the pixels that form the image become gradually visible, making the image appear soft. Conversely, a reduction in the size of an image will tend to increase its smoothness and surface smoothness. [0003] Various image scaling methods exist and are well known to those skilled in the art. One such method is nearest neighbor interpolation, whereby each pixel in the image is replaced with multiple pixels of the same color. Additionally, more complex methods include linear or bilinear interpolation, bicubic interpolation, and supersampling, among others. While some of these...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T9/00H04N7/50
CPCH04N19/00563H04N19/00769G06T3/40H04N19/00757H04N7/465H04N13/0029H04N7/26329H04N19/48H04N19/59H04N19/597H04N13/139
Inventor N·路西尔E·福尔丁
Owner SENSIO TECHNOLOGIES