公开(公告)号：US07430021B2

公开(公告)日：2008-09-30

申请号：US11061826

申请日：2005-02-22

申请人： Masahiro Nako ,  Yasutaka Tsuru ,  Ryo Hasegawa ,  Katsunobu Kimura ,  Hiroshi Aoki

发明人： Masahiro Nako ,  Yasutaka Tsuru ,  Ryo Hasegawa ,  Katsunobu Kimura ,  Hiroshi Aoki

IPC分类号： H04N5/208

CPC分类号： H04N5/208

摘要： A picture quality correction circuit is provided which performs contour correction by grasping features of an input video signal accurately. The correction circuit has a filter circuit for extracting contour components in an inputted video signal, a contour component nonlinear processor for changing amplitudes of the contour components extracted by the filter circuit, an adder for adding outputs of the contour component nonlinear processor and the input video signal, a histogram detection circuit for detecting a histogram of the contour components extracted by the filter circuit, and a control circuit for controlling contour emphasis quantities for the contour component nonlinear processor in accordance with the results of detection by the histogram detection circuit.

摘要翻译： 提供了通过精确地掌握输入视频信号的特征来执行轮廓校正的图像质量校正电路。 校正电路具有用于提取输入视频信号中的轮廓分量的滤波器电路，用于改变由滤波电路提取的轮廓成分的幅度的轮廓分量非线性处理器，用于将轮廓分量非线性处理器和输入视频的输出相加的加法器 信号，用于检测由滤波器电路提取的轮廓分量的直方图的直方图检测电路，以及根据直方图检测电路的检测结果来控制轮廓分量非线性处理器的轮廓强调量的控制电路。

公开(公告)号：US20050285977A1

公开(公告)日：2005-12-29

申请号：US11061826

申请日：2005-02-22

申请人： Masahiro Nako ,  Yasutaka Tsuru ,  Ryo Hasegawa ,  Katsunobu Kimura ,  Hiroshi Aoki

发明人： Masahiro Nako ,  Yasutaka Tsuru ,  Ryo Hasegawa ,  Katsunobu Kimura ,  Hiroshi Aoki

IPC分类号： H04N5/14 ,  H04N5/208 ,  H04N5/21

CPC分类号： H04N5/208

摘要： A picture quality correction circuit is provided which performs contour correction by grasping features of an input video signal accurately. The correction circuit has a filter circuit for extracting contour components in an inputted video signal, a contour component nonlinear processor for changing amplitudes of the contour components extracted by the filter circuit, an adder for adding outputs of the contour component nonlinear processor and the input video signal, a histogram detection circuit for detecting a histogram of the contour components extracted by the filter circuit, and a control circuit for controlling contour emphasis quantities for the contour component nonlinear processor in accordance with the results of detection by the histogram detection circuit.

摘要翻译： 提供了通过精确地掌握输入视频信号的特征来执行轮廓校正的图像质量校正电路。 校正电路具有用于提取输入视频信号中的轮廓分量的滤波器电路，用于改变由滤波电路提取的轮廓成分的幅度的轮廓分量非线性处理器，用于将轮廓分量非线性处理器和输入视频的输出相加的加法器 信号，用于检测由滤波器电路提取的轮廓分量的直方图的直方图检测电路，以及根据直方图检测电路的检测结果来控制轮廓分量非线性处理器的轮廓强调量的控制电路。

公开(公告)号：US07333081B2

公开(公告)日：2008-02-19

申请号：US10893989

申请日：2004-07-20

申请人： Hiroshi Aoki ,  Ryo Hasegawa ,  Hirofumi Sakamoto ,  Haruki Takata ,  Yasutaka Tsuru

发明人： Hiroshi Aoki ,  Ryo Hasegawa ,  Hirofumi Sakamoto ,  Haruki Takata ,  Yasutaka Tsuru

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G3/2092 ,  G09G5/04 ,  G09G2360/16 ,  H04N9/3155

摘要： An object of the present invention is to provide an image display technology with which high contrast can be stably obtained.In order to achieve the above object, the present invention changes the gain of a digital luminance signal by feeding back information on maximum and average luminance levels of the luminance signal, adjusts image contrast, and in accordance with the average luminance level detected from the feedback system, controls the illuminance of the backlight applied to a display unit. The control increases the illuminance of the backlight when the detected average luminance level is higher than the upper-limit value of a previously set reference range, and reduces the illuminance when the detected average luminance level is lower than the lower-limit value of the reference range.

摘要翻译： 本发明的目的是提供可以稳定地获得高对比度的图像显示技术。 为了实现上述目的，本发明通过反馈关于亮度信号的最大和平均亮度水平的信息，调整图像对比度，并且根据从反馈检测到的平均亮度水平来改变数字亮度信号的增益 系统控制应用于显示单元的背光的照度。 当检测到的平均亮度水平高于预先设定的参考范围的上限值时，控制增加背光的照度，并且当检测到的平均亮度水平低于参考值的下限值时，降低照度 范围。

公开(公告)号：US20060061842A1

公开(公告)日：2006-03-23

申请号：US11063752

申请日：2005-02-24

申请人： Naoya Oka ,  Ryo Hasegawa ,  Yasutaka Tsuru ,  Hiroshi Aoki ,  Hirofumi Sakamoto

发明人： Naoya Oka ,  Ryo Hasegawa ,  Yasutaka Tsuru ,  Hiroshi Aoki ,  Hirofumi Sakamoto

IPC分类号： G03F3/08

CPC分类号： H04N5/202 ,  H04N9/69

摘要： The present invention provides a technique for performing gamma correction processing when there are a plurality of characteristic areas, each of which is characterized by the high frequency in a luminance histogram to improve the impression of contrast. According to the present invention, a luminance characteristic detector (4) detects the luminance of an input image signal and a microcomputer (5) calculates an APL and a luminance histogram of an input image signal. A gamma correction circuit (6) performs the gamma correction processing in response to the luminosity of the input image signal by use of the result of the calculation carried out by the microcomputer (5). Then, if there are a plurality of characteristic areas, each of which is characterized by the high frequency in the luminance histogram, a characteristic emphasis circuit (7) performs grayscale extension processing for the plurality of characteristic areas. This makes it possible to perform the most suitable processing in response to the input image signal so that the impression of contrast is improved.

摘要翻译： 本发明提供了一种用于在存在多个特征区域时执行伽马校正处理的技术，每个特征区域的特征在于亮度直方图中的高频以改善对比度的印象。 根据本发明，亮度特性检测器（4）检测输入图像信号的亮度，并且微计算机（5）计算输入图像信号的APL和亮度直方图。 伽马校正电路（6）通过使用由微计算机（5）执行的计算结果，响应于输入图像信号的亮度来进行伽马校正处理。 然后，如果存在多个特征区域，其特征在于亮度直方图中的高频，特征强调电路（7）对多个特征区域进行灰度级扩展处理。 这使得可以响应于输入图像信号执行最合适的处理，从而改善了对比度的印象。

公开(公告)号：US07369183B2

公开(公告)日：2008-05-06

申请号：US11063752

申请日：2005-02-24

申请人： Naoya Oka ,  Ryo Hasegawa ,  Yasutaka Tsuru ,  Hiroshi Aoki ,  Hirofumi Sakamoto

发明人： Naoya Oka ,  Ryo Hasegawa ,  Yasutaka Tsuru ,  Hiroshi Aoki ,  Hirofumi Sakamoto

IPC分类号： H04N5/202 ,  H04N9/69 ,  H04N5/14

CPC分类号： H04N5/202 ,  H04N9/69

摘要： The present invention provides a technique for performing gamma correction processing when there are a plurality of characteristic areas, each of which is characterized by the high frequency in a luminance histogram to improve the impression of contrast. According to the present invention, a luminance characteristic detector (4) detects the luminance of an input image signal and a microcomputer (5) calculates an APL and a luminance histogram of an input image signal. A gamma correction circuit (6) performs the gamma correction processing in response to the luminosity of the input image signal by use of the result of the calculation carried out by the microcomputer (5). Then, if there are a plurality of characteristic areas, each of which is characterized by the high frequency in the luminance histogram, a characteristic emphasis circuit (7) performs grayscale extension processing for the plurality of characteristic areas. This makes it possible to perform the most suitable processing in response to the input image signal so that the impression of contrast is improved.

摘要翻译： 本发明提供了一种用于在存在多个特征区域时执行伽马校正处理的技术，每个特征区域的特征在于亮度直方图中的高频以改善对比度的印象。 根据本发明，亮度特性检测器（4）检测输入图像信号的亮度，并且微计算机（5）计算输入图像信号的APL和亮度直方图。 伽马校正电路（6）通过使用由微计算机（5）执行的计算结果，响应于输入图像信号的亮度来进行伽马校正处理。 然后，如果存在多个特征区域，其特征在于亮度直方图中的高频，特征强调电路（7）对多个特征区域进行灰度级扩展处理。 这使得可以响应于输入图像信号执行最合适的处理，从而改善了对比度的印象。

公开(公告)号：US20050057486A1

公开(公告)日：2005-03-17

申请号：US10893989

申请日：2004-07-20

申请人： Hiroshi Aoki ,  Ryo Hasegawa ,  Hirofumi Sakamoto ,  Haruki Takata ,  Yasutaka Tsuru

发明人： Hiroshi Aoki ,  Ryo Hasegawa ,  Hirofumi Sakamoto ,  Haruki Takata ,  Yasutaka Tsuru

IPC分类号： G02F1/133 ,  G09G3/18 ,  G09G3/20 ,  G09G3/34 ,  G09G3/36 ,  G09G5/04 ,  H04N5/66 ,  H04N5/74 ,  H04N9/12

CPC分类号： G09G3/3406 ,  G09G3/2092 ,  G09G5/04 ,  G09G2360/16 ,  H04N9/3155

摘要： An object of the present invention is to provide an image display technology with which high contrast can be stably obtained. In order to achieve the above object, the present invention changes the gain of a digital luminance signal by feeding back information on maximum and average luminance levels of the luminance signal, adjusts image contrast, and in accordance with the average luminance level detected from the feedback system, controls the illuminance of the backlight applied to a display unit. The control increases the illuminance of the backlight when the detected average luminance level is higher than the upper-limit value of a previously set reference range, and reduces the illuminance when the detected average luminance level is lower than the lower-limit value of the reference range.

摘要翻译： 本发明的目的是提供可以稳定地获得高对比度的图像显示技术。 为了实现上述目的，本发明通过反馈关于亮度信号的最大和平均亮度水平的信息，调整图像对比度，并且根据从反馈检测到的平均亮度水平来改变数字亮度信号的增益 系统控制应用于显示单元的背光的照度。 当检测到的平均亮度水平高于预先设定的参考范围的上限值时，控制增加背光的照度，并且当检测到的平均亮度水平低于参考值的下限值时，降低照度 范围。

公开(公告)号：US07916158B2

公开(公告)日：2011-03-29

申请号：US11412989

申请日：2006-04-28

申请人： Hiroshi Aoki ,  Ryo Hasegawa ,  Naoya Oka ,  Rikiya Asaoka ,  Daisuke Honda

发明人： Hiroshi Aoki ,  Ryo Hasegawa ,  Naoya Oka ,  Rikiya Asaoka ,  Daisuke Honda

IPC分类号： G09G5/10 ,  G06K9/00 ,  H04N5/14

CPC分类号： H04N1/6027 ,  G06T5/009 ,  G06T5/40

摘要： Disclosed is an image display technique for displaying a high-quality image by an image signal of appropriate color saturation. To this end, in the invention, color histogram information is detected from a color difference signal and average brightness information or brightness histogram information from a brightness signal. Based on the detected color histogram information and average brightness information or brightness histogram information, the demodulation axis of a color difference signal is adjusted, thereby controlling the color saturation (chroma) of an image. This enables display of an image having color intensity suited to the brightness and chroma of an image signal.

摘要翻译： 公开了一种用于通过适当色彩饱和度的图像信号显示高质量图像的图像显示技术。 为此，在本发明中，从色差信号和来自亮度信号的平均亮度信息或亮度直方图信息中检测颜色直方图信息。 基于检测到的颜色直方图信息和平均亮度信息或亮度直方图信息，调整色差信号的解调轴，从而控制图像的色彩饱和度（色度）。 这使得能够显示具有适合于图像信号的亮度和色度的颜色强度的图像。

公开(公告)号：US07609282B2

公开(公告)日：2009-10-27

申请号：US11040563

申请日：2005-01-20

申请人： Hiroshi Aoki ,  Ryo Hasegawa

发明人： Hiroshi Aoki ,  Ryo Hasegawa

IPC分类号： G09G5/10

CPC分类号： G09G3/2003 ,  G09G2320/02 ,  G09G2320/0613 ,  G09G2320/066 ,  H04N5/57 ,  H04N21/4318 ,  H04N21/44008

摘要： Image display method and apparatus are capable of displaying an input image signal in an optical condition on a display screen according to the brightness of the screen image. The image display apparatus for performing a specified process on an input image signal and displaying an image by the image signal on a display unit comprises a controller for adjusting a signal level detecting circuit for detecting brightness levels of an image by the input image signal by controlling the sharpness of an image by the image signal according to a detected signal level in such a way that as the detected signal level rises, the sharpness increases.

摘要翻译： 图像显示方法和装置能够根据屏幕图像的亮度在显示屏幕上以光学状态显示输入图像信号。 用于对输入图像信号执行指定处理并通过图像信号在显示单元上显示图像的图像显示装置包括：控制器，用于通过控制来调整用于通过输入图像信号检测图像的亮度水平的信号电平检测电路; 图像信号根据检测信号电平的图像清晰度，使得随着检测信号电平升高，锐度增加。

公开(公告)号：US20060245017A1

公开(公告)日：2006-11-02

申请号：US11412989

申请日：2006-04-28

申请人： Hiroshi Aoki ,  Ryo Hasegawa ,  Naoya Oka ,  Rikiya Asaoka ,  Daisuke Honda

发明人： Hiroshi Aoki ,  Ryo Hasegawa ,  Naoya Oka ,  Rikiya Asaoka ,  Daisuke Honda

IPC分类号： G03F3/08

CPC分类号： H04N1/6027 ,  G06T5/009 ,  G06T5/40

摘要： Disclosed is an image display technique for displaying a high-quality image by an image signal of appropriate color saturation. To this end, in the invention, color histogram information is detected from a color difference signal and average brightness information or brightness histogram information from a brightness signal. Based on the detected color histogram information and average brightness information or brightness histogram information, the demodulation axis of a color difference signal is adjusted, thereby controlling the color saturation (chroma) of an image. This enables display of an image having color intensity suited to the brightness and chroma of an image signal.

摘要翻译： 公开了一种用于通过适当色彩饱和度的图像信号显示高质量图像的图像显示技术。 为此，在本发明中，从色差信号和来自亮度信号的平均亮度信息或亮度直方图信息中检测颜色直方图信息。 基于检测到的颜色直方图信息和平均亮度信息或亮度直方图信息，调整色差信号的解调轴，从而控制图像的色彩饱和度（色度）。 这使得能够显示具有适合于图像信号的亮度和色度的颜色强度的图像。

公开(公告)号：US07907134B2

公开(公告)日：2011-03-15

申请号：US12428281

申请日：2009-04-22

申请人： Hiroshi Aoki ,  Ryo Hasegawa ,  Takaaki Matono

发明人： Hiroshi Aoki ,  Ryo Hasegawa ,  Takaaki Matono

IPC分类号： G09G5/00

CPC分类号： G09G3/2096 ,  G09G3/20 ,  G09G2320/0238 ,  G09G2320/066 ,  G09G2320/0666 ,  G09G2360/16 ,  H04N5/20 ,  H04N5/57 ,  H04N5/70 ,  H04N21/4318 ,  H04N21/44008

摘要： With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog -to-dialog converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.

摘要翻译： 为了提供再现稳定和高对比度视频图像的视频显示技术，构建了对比度调整电路。 对比度调整电路在预定时间内检测模拟对话转换的亮度信号的最大图像电平（MPL）和平均图像电平（APL），确定MPL下降的预定亮度区域之一， APL下降的预定亮度区域，并且基于这样确定的MPL和APL的亮度区域，通过改变亮度信号的增益和通过改变颜色信号的增益来改变色彩深度校正来执行视频图像的对比度调整 。