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Data encoding device and data encoding method and computer program

A data encoding and data technology, applied in computing, image data processing, instruments, etc., can solve the problems that data flow cannot meet local distribution or local decomposition, cannot save information equally, and the density of polar parts becomes lower, etc. Scalability, the effect of reducing the total amount of data

Inactive Publication Date: 2006-04-12
SONY CORP
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Problems solved by technology

[0010] Although the above mapping method has the advantages of high correlation between space and time, and the formula required to convert spherical data into two-dimensional plane data is simple, or the two-dimensional mapping information is simple, the upper and lower sides of the mapped two-dimensional plane Parts (i.e. the poles of the 2D map) are more distorted (or, the poles are less dense compared to the equator)
Therefore, the information contained in each pixel in all directions cannot be equally preserved
In other words, the encoded data stream cannot meet the needs of partial distribution or partial decomposition

Method used

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  • Data encoding device and data encoding method and computer program
  • Data encoding device and data encoding method and computer program
  • Data encoding device and data encoding method and computer program

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Embodiment Construction

[0058] Embodiments of the present invention will be described below with reference to the drawings.

[0059] When viewed from an observation point in space, for example, using a pinhole lens on a spherical surface centered on the observation point, the obtained mapped image information including color and brightness data constitutes a full-circumference image. When the full circumference image obtained by the above method is projected onto a two-dimensional plane (see Figure 19), the distortion of the upper and lower parts of the two-dimensional plane (for example, the poles of the world map) where the data is mapped will become larger (or , the density becomes lower compared with the part near the equator).

[0060] In order to solve the problems arising from projection onto a plane and achieve spatial scalability such as local decomposition or local distribution, the present invention uses a spherical-orthogonal development to describe the full-circumference image (or other ...

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Abstract

Data mapped on a spherical surface is encoded with a format enabling partial resolution and partial distribution. When data mapped on a spherical surface such as an entire circumference image is subjected to the spherical surface wavelet conversion, scaling coefficients and values of wavelet functions are arrayed for each level in the output data. The spatial scalability such as partial distribution or partial resolution can be realized by rearranging the coefficient ck<(j)> in the scaling function PHI k<(j)> and the value dk,m<(j)> of the wavelet function PSI k<(j)> according to positional relations on the spherical surface.

Description

technical field [0001] The present invention relates to a data encoder and a data encoding method for encoding specific geographic surface data, and a computer program having the same effect, and more particularly, the present invention relates to a data encoder and a data encoding method for encoding data mapped on a spherical surface A data encoding method, and a computer program having the same effect. [0002] More specifically, the present invention relates to a data encoder and a data encoding method for encoding data mapped on a spherical surface described by a specific mathematical model, and also relates to a computer program having the same effect. More specifically, the present invention relates to a data encoder and data encoding method for encoding data mapped onto a spherical surface in a manner capable of local resolution and local distribution, and to a computer program. Background technique [0003] Omni-directional cameras have been disclosed as devices c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/30H04N1/41H03M7/30H04S7/00H04R3/00H04R5/027G06T17/40G06T3/00G10L19/00G06T5/00G06T17/20H04N19/597H04N19/60H04N19/63H04N19/91
CPCG06T17/20G06T19/20H04N19/60
Inventor 中川彰人
Owner SONY CORP
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