公开(公告)号：US06781625B2

公开(公告)日：2004-08-24

申请号：US10387481

申请日：2003-03-14

申请人： Kenkichi Hayashi

发明人： Kenkichi Hayashi

IPC分类号： H04N5208

CPC分类号： H04N5/21 ,  G06T5/002 ,  G06T5/004 ,  G06T2207/20192 ,  H04N5/357

摘要： First and second noise detecting circuits detect whether image data output from a signal processing circuit includes noise. If the image data includes noise, first and second noise reducing circuits reduce the noise. An edge extracting circuit extracts edge data from the first image data in which noise has been reduced. An adding circuit adds the edge data and second image data, which has been output by the second noise reducing circuit, and outputs the resultant data. Even though edge enhancement is applied, noise is not enhanced but noise is reduced.

摘要翻译： 第一和第二噪声检测电路检测从信号处理电路输出的图像数据是否包含噪声。 如果图像数据包括噪声，则第一和第二降噪电路降低噪声。 边缘提取电路从已经减少噪声的第一图像数据中提取边缘数据。 加法电路将由第二降噪电路输出的边缘数据和第二图像数据相加，并输出结果数据。 即使施加了边缘增强，噪声也没有增强，但是噪声降低。

公开(公告)号：US06762739B2

公开(公告)日：2004-07-13

申请号：US10077483

申请日：2002-02-14

申请人： Matthew F. Bone

发明人： Matthew F. Bone

IPC分类号： H04N5208

CPC分类号： G09G3/3648 ,  G09G3/20 ,  G09G3/2022 ,  G09G2320/0252 ,  G09G2340/16

摘要： A system and method for reducing the intensity output response time of a liquid crystal display is disclosed. A display driver circuit selectively substitutes compensation data words for data words in a data stream, in order to reduce the intensity output rise time of a liquid crystal display. In one embodiment, the display driver circuit includes a buffer and a rise time compensator. The buffer receives and stores a first data word intended to be written to a particular pixel. The rise time compensator, upon receipt of a second data word intended for the same pixel, retrieves the first data word from the buffer, compares the value of the second data word to the value of the first data word, and selectively outputs either the second data word or a compensation data word, depending on the relative values of the first and second data words. If the value of the second data word exceeds the value of the first data word by some predetermined amount, then the compensation data word, having a value greater than the second data word, is substituted for the second data word.

摘要翻译： 公开了一种用于降低液晶显示器的强度输出响应时间的系统和方法。 为了减少液晶显示器的强度输出上升时间，显示驱动电路选择性地将补偿数据字代替数据流中的数据字。 在一个实施例中，显示驱动器电路包括缓冲器和上升时间补偿器。 缓冲器接收并存储要写入特定像素的第一数据字。 上升时间补偿器在接收到用于相同像素的第二数据字时，从缓冲器检索第一数据字，将第二数据字的值与第一数据字的值进行比较，并选择性地输出第二数据字 数据字或补偿数据字，这取决于第一和第二数据字的相对值。 如果第二数据字的值超过第一数据字的值一定预定量，则具有大于第二数据字的值的补偿数据字被替换为第二数据字。

公开(公告)号：US06774943B1

公开(公告)日：2004-08-10

申请号：US09386256

申请日：1999-08-31

申请人： Sophia Wei-Chun Kao ,  Der-Ren Chu ,  Ren-Yuh Wang

发明人： Sophia Wei-Chun Kao ,  Der-Ren Chu ,  Ren-Yuh Wang

IPC分类号： H04N5208

CPC分类号： H04N9/045 ,  H04N5/208 ,  H04N9/646 ,  H04N11/20

摘要： An apparatus for edge enhancement of a digital image provided as raw digital image data to an input terminal and for providing processed image data to an output terminal. An offset processing circuit is coupled to the input terminal and configured to receive the raw data and generate offset data. An interpolation circuit is coupled to the offset processing circuit and configured to receive the offset data and to provide interpolated data. A color processing circuit is coupled to the interpolation circuit and configured to process the interpolated data to generate color data. An edge enhancement circuit is coupled to the interpolation circuit and the color processing circuit and configured to enhance the edges of the image based on the interpolated data and the color data to generate enhanced data. A lookup table is coupled to the color processing circuit and the edge enhancement circuit and configured to lookup the color data and the enhanced data to generate lookup data. A conversion circuit is coupled to the lookup table circuit and configured to convert the lookup data to generate the processed image data to the output terminal. In one aspect of the invention the processing is performed with RGB data, and in another aspect of the invention the processing is performed with YUV data. In another embodiment of the invention the edge enhancement circuit includes an edge extraction circuit, a cut-off level adjustment circuit and an edge gain scaling circuit. These circuits are used to define the edge of objects in the image and to enhance their respective edges. Advantages of the present invention include correctly locating object edges, and avoiding artifacts when the edges are enhanced. Consequently, the invention provides an improved image edge enhancement technique over conventional edge processors.

摘要翻译： 一种用于将作为原始数字图像数据提供给数字图像的边缘增强的装置，用于向输入端子提供处理的图像数据到输出端子。 偏移处理电路耦合到输入端并被配置为接收原始数据并产生偏移数据。 内插电路耦合到偏移处理电路并且被配置为接收偏移数据并提供内插数据。 颜色处理电路耦合到内插电路并且被配置为处理内插数据以生成颜色数据。 边缘增强电路耦合到内插电路和颜色处理电路，并且被配置为基于内插数据和颜色数据来增强图像的边缘以生成增强数据。 查找表耦合到颜色处理电路和边缘增强电路，并且被配置为查找颜色数据和增强数据以生成查找数据。 转换电路耦合到查找表电路并且被配置为转换查找数据以将经处理的图像数据生成到输出终端。 在本发明的一个方面，用RGB数据进行处理，在本发明的另一方面，用YUV数据进行处理。 在本发明的另一个实施例中，边缘增强电路包括边缘提取电路，截止电平调整电路和边缘增益缩放电路。 这些电路用于定义图像中物体的边缘并增强其各自的边缘。 本发明的优点包括正确定位物体边缘，并且当边缘增强时避免伪影。 因此，本发明提供了相对于常规边缘处理器的改进的图像边缘增强技术。

公开(公告)号：US06690429B1

公开(公告)日：2004-02-10

申请号：US09497877

申请日：2000-02-04

申请人： Sang Yeon Kim

发明人： Sang Yeon Kim

IPC分类号： H04N5208

CPC分类号： H04N9/646 ,  H04N5/142

摘要： A device and method for processing a color signal which can improve the sharpness of a color signal is disclosed. In the present invention, an edge of an image is detected and the detected edge is improved by making a sharp transition without over shoot or under shoot. Particularly, the color signal is delayed, and either a maximum or minimum value of the delayed signal is selectively output if the input signal is determined to be for a position at the edge region.

摘要翻译： 公开了一种用于处理能提高彩色信号的清晰度的彩色信号的装置和方法。 在本发明中，检测图像的边缘，并且通过在没有拍摄或拍摄的情况下进行锐利的转换来改善检测到的边缘。 特别地，颜色信号被延迟，并且如果确定输入信号是针对边缘区域的位置，则选择性地输出延迟信号的最大值或最小值。

公开(公告)号：US06590617B1

公开(公告)日：2003-07-08

申请号：US09507942

申请日：2000-02-22

申请人： Izumi Kanai ,  Yukio Hiraki ,  Kohei Inamura

发明人： Izumi Kanai ,  Yukio Hiraki ,  Kohei Inamura

IPC分类号： H04N5208

CPC分类号： H04N5/208

摘要： This invention can suppress overshoot/undershoot, and can maintain the improvement effect of the leading edge of an edge portion. For this purpose, a second derivative signal generator (1) generates a second derivative signal (s5) on the basis of time-serially input three successive pixels. A second derivative signal suppression unit (2) generates a signal (s8) obtained by suppressing the second derivative signal, and a signal (s9) indicating the sign of the second derivative signal. The absolute values of the differences between the pixel of interest, and its neighboring pixels are computed, and a smaller one of the absolute values is selected as a signal (s14) by a minimum value selection circuit (18). By multiplying the obtained signals (s8, s9, s14) by a multiplier (19), an edge-emphasizing signal (s15) is generated. The edge-emphasizing signal (s15) is added to the signal of the pixel of interest by an adder (20), thus obtaining an edge-emphasized signal s16.

摘要翻译： 本发明可以抑制过冲/下冲，并且可以保持边缘部分的前缘的改善效果。 为此，二阶导数信号发生器（1）基于时间顺序输入三个连续的像素产生二阶导数信号（s5）。 第二导数信号抑制单元（2）产生通过抑制二次微分信号获得的信号（s8）和表示二阶导数信号的符号的信号（s9）。 计算感兴趣像素与其相邻像素之间的差异的绝对值，并且通过最小值选择电路（18）将绝对值中较小的绝对值选择为信号（s14）。 通过将所获得的信号（s8，s9，s14）乘以乘法器（19），产生边缘强调信号（s15）。 通过加法器（20）将边缘加重信号（s15）加到感兴趣像素的信号上，从而获得边缘强调信号s16。

公开(公告)号：US06781636B2

公开(公告)日：2004-08-24

申请号：US09803337

申请日：2001-03-09

申请人： Jeroen Hubert Christoffel Jacobus Stessen

发明人： Jeroen Hubert Christoffel Jacobus Stessen

IPC分类号： H04N5208

CPC分类号： G06T5/009 ,  G06T5/40 ,  G06T2207/10016

摘要： A video apparatus includes a histogram modification means circuit for matching at least luminance signals (Y) for separate pixels to prescribed values. The histogram modification circuit has a first memory (3) with a first look-up table for correcting the video luminance signals (Y), and a second memory (4) with a second look-up table (4) for correcting the color-difference signals (U and V). The values within the second look-up table (4) are derived from the values in the first look-up table (3). Preferably, in order to obtain a distribution of a rounding-off error over a pixel's neighbor, each of the channels for the luminance (Y) and color-difference signals (U and V) includes a closed lsb (least significant bit) correction loop (14, 14′) with a quantizer (15, 15′) and a pixel memory (16, 16′), the input of the lsb correction loop being formed by the corrected luminance and corrected color-difference signals, respectively.

摘要翻译： 视频装置包括用于将至少用于单独像素的亮度信号（Y）与规定值相匹配的直方图修正装置电路。 直方图修正电路具有第一存储器（3），其具有用于校正视频亮度信号（Y）的第一查找表，以及具有第二查找表（4）的第二存储器（4） 差分信号（U和V）。 第二查询表（4）中的值从第一查找表（3）中的值导出。 优选地，为了获得在像素邻居上的舍入误差的分布，用于亮度（Y）和色差信号（U和V）的每个通道包括闭合的lsb（最低有效位）校正循环 （14,14'）与量化器（15,15'）和像素存储器（16,16'）分别由校正的亮度和校正色差信号形成lsb校正环路的输入。

公开(公告)号：US06642962B1

公开(公告)日：2003-11-04

申请号：US09388318

申请日：1999-09-01

申请人： Tao Lin ,  Vincent Chor-Fung Yu ,  Tianhua Tang ,  Beong-Kwon Hwang

发明人： Tao Lin ,  Vincent Chor-Fung Yu ,  Tianhua Tang ,  Beong-Kwon Hwang

IPC分类号： H04N5208

CPC分类号： G06T3/4015 ,  G06T3/4007 ,  G06T3/403 ,  H04N9/045

摘要： A digital-camera processor receives mono-color digital pixels from an image sensor. Each mono-color pixel is red, blue, or green. The stream of pixels from the sensor has alternating green and red pixels on odd lines, and blue and green pixels on even lines in a Bayer pattern. Each mono-color pixel is white balanced by multiplying with a gain determined in a previous frame and then stored in a line buffer. A horizontal interpolator receives an array of pixels from the line buffer. The horizontal interpolator generates missing color values by interpolation within horizontal lines in the array. The intermediate results from the horizontal interpolator are stored in a column buffer, and represent one column of pixels from the line buffer. A vertical interpolator generates the final RGB value for the pixel in the middle of the column register by vertical interpolation. The RGB values are converted to YUV. The vertical interpolator also generates green values for pixels above and below the middle pixel. These green values are sent to an edge detector. The edge detector applies a filter to the 3 green values and 6 more green values from the last 2 clock cycles. When an edge is detected, an edge enhancer is activated. The edge enhancer adds a scaled factor to the Y component to sharpen the detected edge. Color enhancement is performed on the U and V components. The line buffer stores only 4 full lines of pixels and no full-frame buffer is needed.

摘要翻译： 数码相机处理器从图像传感器接收单色数字像素。 每个单色像素是红色，蓝色或绿色。 来自传感器的像素流在奇数行上具有交替的绿色和红色像素，并且在拜耳图案中的偶数行上的蓝色和绿色像素。 每个单色像素通过与前一帧中确定的增益相乘然后存储在行缓冲器中来进行白平衡。 水平内插器从行缓冲器接收像素阵列。 水平内插器通过在数组中的水平线内的插值生成缺失的颜色值。 来自水平插值器的中间结果存储在列缓冲器中，并且表示来自行缓冲器的一列像素。 垂直内插器通过垂直内插生成列寄存器中间的像素的最终RGB值。 RGB值被转换为YUV。 垂直内插器还为中间像素上方和下方的像素生成绿色值。 这些绿色值被发送到边缘检测器。 边缘检测器对最近2个时钟周期的3个绿色值和6个绿色值应用滤波器。 当检测到边缘时，边缘增强器被激活。 边缘增强器向Y分量添加缩放因子以锐化检测到的边缘。 对U和V分量执行色彩增强。 行缓冲区仅存储4行全像素，不需要全帧缓冲区。

公开(公告)号：US06404460B1

公开(公告)日：2002-06-11

申请号：US09252841

申请日：1999-02-19

申请人： Datong Chen ,  Xinping He

发明人： Datong Chen ,  Xinping He

IPC分类号： H04N5208

CPC分类号： H04N5/208 ,  H04N5/21

摘要： The present invention is directed to a method and apparatus for image edge enhancement with background noise reduction. According to the method and apparatus, background noise is reduced through use of feed forward gain control and threshold control of a sharpness control amplifier. In a prior art circuit, the sharpness control amplifier was controlled only by a sharpness control signal. By controlling the sharpness control amplifier also with a feed forward gain control and a threshold control, the circuit can be made to have background noise reduction while maintaining a continuous input/output characteristic curve. According to the input/output characteristic curve, when the amplitude of the transitions of the video signal are below a particular threshold value, the amplification of the sharpness control amplifier is reduced by the gain control, such that low amplitude noise signals are reduced. When the amplitude of the transitions of the video signal, representing image edge transitions, are above the amplitude of the threshold level, then normal signal amplification is produced. In this manner, the edges of the image are enhanced while background noise is reduced.

摘要翻译： 本发明涉及一种用于具有背景噪声降低的图像边缘增强的方法和装置。 根据该方法和装置，通过使用前馈增益控制和锐度控制放大器的阈值控制来减少背景噪声。 在现有技术的电路中，锐度控制放大器仅由锐度控制信号控制。 通过利用前馈增益控制和阈值控制来控制锐度控制放大器，可以使电路具有背景噪声降低，同时保持连续的输入/输出特性曲线。 根据输入/输出特性曲线，当视频信号的转变幅度低于特定的阈值时，通过增益控制减小锐度控制放大器的放大，从而降低了低振幅噪声信号。 当表示图像边缘跃迁的视频信号的转变的幅度高于阈值电平的幅度时，产生正常的信号放大。 以这种方式，增强了图像的边缘，同时降低了背景噪声。

公开(公告)号：US06768514B1

公开(公告)日：2004-07-27

申请号：US09441855

申请日：1999-11-17

申请人： Takashi Tsuchiya ,  Masami Ogata ,  Kazuhiko Ueda

发明人： Takashi Tsuchiya ,  Masami Ogata ,  Kazuhiko Ueda

IPC分类号： H04N5208

CPC分类号： H04N5/20 ,  H04N5/142

摘要： The present invention relates to an image processing apparatus and an image processing method, and it is applicable to a variety of kinds of image processing apparatus such as television receivers, video tape recorders, television cameras, printers, etc., and it makes it possible to correct the gradation of an image avoiding the lowering of partial contrast effectively. In this case, an excessive emphasis of an outline can be avoided.

摘要翻译： 图像处理装置和图像处理方法技术领域本发明涉及一种图像处理装置和图像处理方法，其可应用于电视接收机，录像机，电视摄像机，打印机等各种图像处理装置，并且可以使其成为可能 以校正图像的灰度，从而有效地避免部分对比度的降低。 在这种情况下，可以避免对轮廓的过度强调。

公开(公告)号：US06606119B1

公开(公告)日：2003-08-12

申请号：US09039126

申请日：1998-03-13

申请人： Tadashi Shibata ,  Tadahiro Ohmi

发明人： Tadashi Shibata ,  Tadahiro Ohmi

IPC分类号： H04N5208

CPC分类号： H04N5/357 ,  H04N5/142

摘要： The present invention has as an object thereof to provide a semiconductor arithmetic circuit which is capable of conducting edge accentuation processing, edge detection processing, and noise removal by means of averaging processing of an image, using extremely simple circuitry. A semiconductor arithmetic circuit is provided with an amplifier circuit in which an input terminal is connected to the gate electrode of at least one MOS type transistor, a first signal input terminal, which is connected with the input terminal via a first switching element, and a plurality of second signal input terminals, which are connected with the input terminal via a capacity element; wherein a mechanism is provided for opening the first switching element in a state in which a first signal voltage is applied to the input terminal and a predetermined second input signal voltage group is applied to the second signal input terminals, and for thereafter applying a predetermined third input signal voltage group to the second signal input terminals, and wherein the amplifier circuit comprises a source follower circuit or a voltage follower circuit.

摘要翻译： 本发明的目的是提供一种半导体运算电路，其能够通过使用非常简单的电路的图像的平均处理来进行边缘突出处理，边缘检测处理和噪声去除。 半导体运算电路设置有放大电路，其中输入端连接到至少一个MOS型晶体管的栅电极，经由第一开关元件与输入端连接的第一信号输入端和 多个第二信号输入端，经由电容元件与输入端连接; 其特征在于，提供一种机构，用于在将第一信号电压施加到输入端子并且将预定的第二输入信号电压组施加到第二信号输入端子的状态下打开第一开关元件，然后施加预定的第三 输入信号电压组到第二信号输入端，并且其中放大器电路包括源极跟随器电路或电压跟随器电路。