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Image processing device, image display device, image processing method, computer program, and recording medium

An image processing device and computing technology, applied in image data processing, computing, image enhancement, etc.

Inactive Publication Date: 2014-12-17
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that when the enhancement effect of important frequency bands is increased, unnecessary high-frequency components are also enhanced.

Method used

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  • Image processing device, image display device, image processing method, computer program, and recording medium
  • Image processing device, image display device, image processing method, computer program, and recording medium
  • Image processing device, image display device, image processing method, computer program, and recording medium

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Experimental program
Comparison scheme
Effect test

Embodiment approach 2

[0098] In the video signal processing unit of this embodiment, image 3 The detail improvement processing unit 13 of the video signal processing unit 42 in the first embodiment shown is replaced by Figure 11 The sense of detail improvement processing unit (detail correction processing unit) 130 is shown. In the video signal processing unit and the television broadcast receiving device of the present embodiment, the configuration other than the detail enhancement processing unit 130 is the same as that of the video signal processing unit 42 and the television broadcast receiving device 1 of the first embodiment. Therefore, the same reference numerals are assigned to the same configurations as those described in Embodiment 1, and the description of the processing described in Embodiment 1 will be omitted.

[0099] The sense of detail improvement processing unit 130 of this embodiment includes a high-pass filter processing unit 25 in addition to the maximum value calculation pr...

Embodiment approach 3

[0110] In Embodiments 1 and 2 above, a case where the image processing device according to the present invention is applied to the video signal processing unit 42 of the television broadcast receiving device 1 including the tuner 3 has been described as an example. However, the image processing device according to the present invention can also be applied to, for example, a processing unit that executes video signal processing of a monitor (information display) that does not have the tuner 3 . In this case, the monitor is the image display device according to the present invention, and the schematic configuration of the monitor is, for example, from figure 1 The structure shown is the structure after the tuner 3 is removed. Since the image processing device according to the present invention is applied to a processing unit that performs video signal processing on a monitor, it is possible to perform processing for improving the sense of detail of a video on the monitor.

[01...

Embodiment approach 1

[0113] The video signal processing unit 42 in Embodiment 1 or 2 may be configured by hardware logic, or may be realized by software using a CPU as described below.

[0114] That is, the video signal processing section 42 (or the television broadcast receiving apparatus 1) includes: a CPU (central processing unit) that executes instructions of a control program for realizing each function, and a ROM (read only memory) that stores the above program. , read-only memory), RAM (random access memory, random access memory) for expanding the above-mentioned program, storage devices (recording media) such as a memory for storing the above-mentioned program and various data, and the like. Then, a recording medium on which program codes (executable program, intermediate code program, source program) of each control program of the video signal processing unit 42, which is software for realizing the above-mentioned functions, is recorded in a computer-readable form is supplied. For the vid...

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Abstract

A sense-of-detail enhancing processor (13) is provided with a maximum-value calculation processor (17) for obtaining the maximum value of pixel values from among a pixel of interest and surrounding pixels, a minimum-value calculation processor (18) for obtaining a minimum value, a high-frequency component generating processor (19) for obtaining a high-frequency component on the basis of the pixel value of the pixel of interest, the maximum value, and the minimum value, and a mixing processor (20) for correcting the pixel value of the pixel of interest using the high-frequency component.

Description

technical field [0001] The invention relates to an image processing device, an image processing method, a computer program and a recording medium, which can improve the sense of detail of an image during image and video processing. Background technique [0002] When a still image or a moving image is enlarged and displayed, even if the image quality is sufficiently sharp in a constant-magnification display, the image quality may become blurred with loss of sharpness and detail. Therefore, sharpness can be improved by applying enhancement processing such as unsharp mask processing before enlarging processing. However, since the outline becomes thicker, or overshoots or undershoots occur around the outline, applying enlargement processing after enhancement processing will result in a very unnatural image. [0003] Therefore, by adopting a small block size (mask size) such as 3×3 as filter processing, it is possible to reduce the thickening of the outline. However, if the mas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/208G06T5/20
CPCG06T5/20G06T5/003H04N5/142H04N5/208H04N9/646H04N9/76
Inventor 松田豊久
Owner SHARP KK