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Image expansion apparatus and image expansion method

A technology for magnifying devices and images, which is applied in image data processing, graphics and image conversion, instruments, etc., and can solve problems such as unevenness

Inactive Publication Date: 2013-09-18
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the enlarging process using the pixel interpolation technique, depending on the picture, it may become a so-called jaggy image in which diagonal lines look jagged.

Method used

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  • Image expansion apparatus and image expansion method
  • Image expansion apparatus and image expansion method
  • Image expansion apparatus and image expansion method

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Embodiment Construction

[0025] Hereinafter, further embodiments will be described with reference to the drawings. In the drawings, the same reference numerals denote the same or similar parts.

[0026] A first embodiment will be described with reference to the drawings. figure 1 It is a block diagram showing a video enlargement device.

[0027] In this embodiment, image enlargement processing is performed by pixel interpolation. In the pixel interpolation of this embodiment, the continuity of the pattern (the direction of the pattern) is taken into consideration, and the interpolation pixel of the outline part of the pattern is calculated using a plurality of pixels that are the interpolation direction along the outline direction, to generate interpolated pixels. The contour is judged by performing edge detection of the image. In the present embodiment, patterns (hereinafter referred to as fixed patterns) of a plurality of assumed contour shapes (interpolation directions) are prepared in advance,...

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Abstract

An image expansion apparatus includes a second order differential circuit, a multi-valued processing unit, a first determination unit, a selection unit, and an interpolation processing unit. The first determination unit compares respectively a plurality of fixed patterns, which is each assigned with an interpolation direction in accordance with an outline shape of an image, with spatial dispersion of an output of the multi-valued processing unit. The first determination unit determines a fixed pattern corresponding to the output. The first determination unit determines an interpolation direction assigned to the fixed pattern as a candidate of an interpolation direction for the outline shape. The selection unit selects an interpolation direction of a plurality of candidates of the interpolation direction for the outline shape. The interpolation processing unit generates an interpolation pixel to determine the pixel for the interpolation based on the interpolation direction selected by the selection unit.

Description

[0001] (Citation of relevant literature) [0002] This application claims priority based on the benefit of priority arising from the prior Japanese Patent Application No. 2012-057650 filed on March 14, 2012, the entire contents of which are hereby incorporated by reference. technical field [0003] The embodiments described here relate to a video enlargement device and a video enlargement method. Background technique [0004] In recent years, in response to demands for higher image quality, the display resolution (resolution) that can be displayed by display devices has increased. In a high-resolution display device, image data with a relatively low resolution may be input. In this case, the image displayed on the screen of the display device is relatively small. In a display device, an input image may be enlarged and displayed. [0005] Conventionally, pixel interpolation techniques have been used as image enlargement processing. Pixel interpolation is a technique of in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
CPCG06T3/4007
Inventor 工藤司
Owner KK TOSHIBA