专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06693669B1 Method for reducing image blurring 失效
标题翻译：减少图像模糊的方法
公开(公告)号：US06693669B1
公开(公告)日：2004-02-17
申请号：US09595224
申请日：2000-06-16
申请人： Jing Wu , Xing Zhang
发明人： Jing Wu , Xing Zhang
IPC分类号： H04N5202
CPC分类号： H04N5/142 , G06T5/003 , G06T5/20 , G06T7/13
摘要： A method for reducing blurring associated with objects forming part of a grey scale image. The method includes receiving (11) a set of image pixels and then calculating (12) a gradient value for each one of the image pixels in the set. A selecting step (13) selects candidate object edge pixels from the image pixels by comparing the gradient value for each one of the image pixels in the set with a threshold value. A determining step (14) then determines a distribution of number candidate object edge pixels with specific grey level values. Thereafter, candidate object edge pixels within said distribution that have the same grey level values are identically non-linearly modified at a modifying step 15.
摘要翻译：一种用于减少与形成灰度图像的一部分的对象相关联的模糊的方法。该方法包括接收（11）一组图像像素，然后计算（12）集合中每个图像像素的梯度值。选择步骤（13）通过将集合中的每一个图像像素的梯度值与阈值进行比较，从图像像素中选择候选对象边缘像素。确定步骤（14）然后确定具有特定灰度值的候选对象边缘像素数目的分布。此后，具有相同灰度值的所述分布内的候选对象边缘像素在修改步骤15处被相同地非线性修改。

2. 发明授权

US06515699B2 Anti-aliasing video camera processing apparatus and method 失效
公开(公告)号：US06515699B2
公开(公告)日：2003-02-04
申请号：US08690557
申请日：1996-07-31
申请人： Ichiro Tanji , Fumihiko Sudo , Taku Kihara
发明人： Ichiro Tanji , Fumihiko Sudo , Taku Kihara
IPC分类号： H04N5202
CPC分类号： H04N5/202
摘要： High frequency components of a video signal are attenuated for avoiding aliasing when the video signal is corrected by a non-linear gamma correction circuit. Such high frequency components arise from the video signal harmonics, and also are generated in image contour processing of the video signal. The high frequency components are band limited, thereby linearizing the gamma correction circuit and preventing aliasing. Up-converting the sampling frequency increases a desired band limitation area and defers the generation of high frequency components that cause aliasing. The non-linear gamma correction function is divided into a plurality of sections which are replaced by respective straight-line segments each represented by a linear expression, and gamma correction is effected with a straight-line segment corresponding to the amplitude of the digital video signal.

3. 发明授权

US06215529B1 Gamma compensation apparatus 失效
标题翻译：伽玛补偿装置
公开(公告)号：US06215529B1
公开(公告)日：2001-04-10
申请号：US09035695
申请日：1998-03-05
申请人： Hiroko Sugimoto , Atsuhisa Kageyama , Masahiro Takeshima , Minoru Kawabata
发明人： Hiroko Sugimoto , Atsuhisa Kageyama , Masahiro Takeshima , Minoru Kawabata
IPC分类号： H04N5202
CPC分类号： H04N9/68 , H04N9/69
摘要： Aiming to improve color reproducibility of a red part having high color saturation, a gamma compensation apparatus of the present invention is composed of a bending point setting block 100a and a gamma compensation block 101a and bending point setting block 100a is composed of a high APL detection circuit 1a inputting an average picture level of an input luminance signal and for detecting and taking out a signal component higher than a designated level; a gain controller 2a for gain controlling the detected signal at the high APL picture detection circuit; and an adder 3a for adding a designated offset to the output of gain controller 2a, and gamma compensation block 101a is composed of a slice circuit 4a inputting a color difference signal (R-Y) and the output of bending point setting block 100a and taking out a color difference signal component higher than the output signal level of bending point setting block 100a; a gain controller 5a for adjusting the output level of slice circuit 4a; and a subtracter 6a for subtracting the output of gain controller 5a from the input color difference signal (R-Y) and outputting a gamma compensated color difference signal (R-Y)′.
摘要翻译：为了提高具有高色饱和度的红色部分的色彩再现性，本发明的伽马补偿装置由弯曲点设定块100a和伽马补偿块101a构成，弯曲点设定块100a由高APL检测电路1a输入输入亮度信号的平均图像电平，并且用于检测和取出高于指定电平的信号分量; 增益控制器2a，用于对高APL画面检测电路的检测信号进行增益控制; 以及加法器3a，用于将指定的偏移量与增益控制器2a的输出相加，伽马补偿块101a由输入色差信号（RY）的切片电路4a和弯曲点设定块100a的输出构成，色差信号分量高于弯曲点设定块100a的输出信号电平; 用于调节切片电路4a的输出电平的增益控制器5a; 以及用于从输入色差信号（R-Y）中减去增益控制器5a的输出并输出伽马补偿色差信号（R-Y）'的减法器6a。

4. 发明授权

US06614475B1 Correction apparatus and method for imaging signals and video camera 失效
标题翻译：用于成像信号和摄像机的校正装置和方法
公开(公告)号：US06614475B1
公开(公告)日：2003-09-02
申请号：US09214737
申请日：1999-04-12
申请人： Satoshi Yamaga , Seiji Sato , Keiichi Ito
发明人： Satoshi Yamaga , Seiji Sato , Keiichi Ito
IPC分类号： H04N5202
CPC分类号： H04N5/3572 , H04N5/361
摘要： An average signal level of imaging signals obtained by a solid-state image pickup device of an image pickup unit 112 is detected by an average signal level detection circuit 116. Based on APL (average picture level) data specifying the average signal level APL as detected by this average signal level detection circuit 116, a system control micro-computer 117 refers to a table of an average signal level versus correction level finction specifying the correction level in the plural average signal levels previously stored in a memory 118 to read out flare correction data conforming to the APL data. A D/A-LPF circuit 119 converts the flare correction data by digital/analog (D/A) conversion to generate flare correction data, which are summed by adders 114R, 114G and 114B to imaging signal obtained by said solid-state image pickup device.
摘要翻译：由平均信号电平检测电路116检测由摄像单元112的固态图像摄取装置获得的成像信号的平均信号电平。基于指定检测到的平均信号电平APL的APL（平均图像电平）数据通过该平均信号电平检测电路116，系统控制微计算机117参考平均信号电平对校正电平精度的表，其指定先前存储在存储器118中的多个平均信号电平中的校正电平，以读出耀斑校正数据符合APL数据。 AD / A-LPF电路119通过数字/模拟（D / A）转换来转换闪光校正数据，以产生闪光校正数据，其由加法器114R，114G和114B相加到由所述固态图像拾取装置获得的成像信号。

5. 发明授权

US06295098B1 Illumination intensity correcting circuit 失效
标题翻译：照明强度校正电路
公开(公告)号：US06295098B1
公开(公告)日：2001-09-25
申请号：US09348075
申请日：1999-07-06
申请人： Hitoshi Motonakano , Shozo Mitarai , Akira Arimizu
发明人： Hitoshi Motonakano , Shozo Mitarai , Akira Arimizu
IPC分类号： H04N5202
CPC分类号： H04N5/202 , H04N9/69
摘要： An illumination intensity correcting circuit including a curve fitting circuit formed by differential amplifier circuits and a load resistor, wherein the amplification factor of the curve fitting circuit is changed before and after each breakpoint voltage, the reference voltages of the differential amplifier circuits are set so that at least two breakpoint voltages are arranged in the range of a voltage of a video signal, and the amplification factors of the differential amplifier circuits are set so that the amplification factor of the curve fitting circuit in the range of the signal voltage inside of the two breakpoint voltages is smaller than the amplification factor outside of the two breakpoint voltages.
摘要翻译：一种照明强度校正电路，包括由差分放大器电路和负载电阻器形成的曲线拟合电路，其中在每个断点电压之前和之后改变曲线拟合电路的放大系数，差分放大器电路的参考电压被设置为在视频信号的电压范围内设置至少两个断点电压，并且设置差分放大器电路的放大系数，使得曲线拟合电路的放大系数在两个信号电压的范围内断点电压小于两个断点电压以外的放大系数。

6. 发明授权

US06233011B1 Apparatus and method for compensating image being sensed 失效
标题翻译：用于补偿被感测图像的装置和方法
公开(公告)号：US06233011B1
公开(公告)日：2001-05-15
申请号：US08878202
申请日：1997-06-18
申请人： Phil Su
发明人： Phil Su
IPC分类号： H04N5202
CPC分类号： H04N1/401
摘要： An apparatus and a method for compensating the gray-scale values of an image scanned by a contact image sensor. The gray-scale compensating apparatus includes: a power supply for providing a fixed level of voltage source, a contact image sensor for scanning an image and outputting image voltages VIMG of pixels of the image, or scanning a white pixel and outputting the white-level voltage VP of the white pixel, an analog/digital converter, to receive the fixed voltage from the power supply and the image voltage VIMG or the white-level voltage VP, a microprocessor to calculate the average of n white-level values G(x, y), where n is an integer, and the average value G′(x)=(G(x, 0)+G(x, 1)+ . . . +G(x, n−1))/n. The microprocessor also determines the gray-scale values g′(x, y) of the image being compensated by calculating the gray-scale values g(x, y) of the image not compensated in accordance with the value of G′(x).
摘要翻译：一种用于补偿由接触式图像传感器扫描的图像的灰度值的装置和方法。灰度补偿装置包括：用于提供固定电平的电源的电源，用于扫描图像的接触图像传感器，并输出图像的像素的图像电压VIMG，或者扫描白色像素，并输出白色像素白色像素的电压VP，模拟/数字转换器，用于从电源接收固定电压和图像电压VIMG或白电平电压VP，微处理器计算n个白电平值G（x ，y），其中n是整数，平均值G'（x）=（G（x，0）+ G（x，1）+ ... + G（x，n-1））/ n 。微处理器还通过根据G'（x）的值计算未补偿的图像的灰度值g（x，y）来确定正在补偿的图像的灰度值g'（x，y）。

7. 发明授权

US06680755B2 Adjustable biased gamma-correction circuit with central-symmetry voltage 有权
标题翻译：具有中心对称电压的可调偏置伽马校正电路
公开(公告)号：US06680755B2
公开(公告)日：2004-01-20
申请号：US09826097
申请日：2001-04-05
申请人： Yuhren Shen , Chien-Chih Chen , Ming-Daw Chen , Ming-Jiun Liaw
发明人： Yuhren Shen , Chien-Chih Chen , Ming-Daw Chen , Ming-Jiun Liaw
IPC分类号： H04N5202
CPC分类号： G09G3/3696 , G09G2320/0276
摘要： An adjustable biased Gamma-correction circuit with central-symmetry voltage is disclosed. The present invention provides varistors, transistors, or operation amplifiers in a Gamma-correction circuit to obtain a plurality of plus and minus symmetrical driving voltages based on a central voltage. Utilizing the present invention, a Gamma-correction circuit can generate the most adjustable driving voltages by using the minimum voltage sources.
摘要翻译：公开了一种具有中心对称电压的可调偏置伽马校正电路。本发明提供伽马校正电路中的压敏电阻，晶体管或运算放大器，以基于中心电压获得多个正负对称的驱动电压。利用本发明，伽马校正电路可以通过使用最小电压源来产生最可调的驱动电压。

8. 发明授权

US06452631B1 Method and apparatus for forming high contrast image in imaging system 失效
标题翻译：用于在成像系统中形成高对比度图像的方法和装置
公开(公告)号：US06452631B1
公开(公告)日：2002-09-17
申请号：US08962989
申请日：1997-10-31
申请人： Chuan-Yu Hsu , Wen-Tso Tseng , Shih-Huang Chen
发明人： Chuan-Yu Hsu , Wen-Tso Tseng , Shih-Huang Chen
IPC分类号： H04N5202
CPC分类号： H04N1/4078
摘要： The present invention improves the contrast of the image signal before further adjustment by the principle of superposition of the optical-transferring system. There are two ways to carry out the principle of superposition one is in space domain, the other is in frequency domain. Each of them can be implemented by the system or method of the present invention. To implement the compensation in space domain, the present invention utilize the result of scanning the correction board to compensate the optical energy scattered by the optical-transferring system. A pixel in object space can be expressed in terms of the linear combination of the corresponding pixels in image space according to the principle of superposition. Thus is obtained by extracting the coefficients of the linear combination. The pixels of desired picture in image space is multiplied by the compensation vector and the image with sharp contrast is produced by the present invention in space domain. To implement the compensation in frequency domain, the present invention get the result of scanning the correction board and transform it to frequency form. Thus the compensation vector is obtained by extracting the amplitude and phase angle of the frequency form of the result of scanning the correction board. Transform the result of scanning the desired picture into frequency form, followed by dividing it by the compensation vector. The desired picture in frequency form is obtained. Taking the inverse transform of the desired picture, which is in frequency form, the result is transformed in space domain and can be processed or displayed with sharp contrast.
摘要翻译：本发明通过光传输系统的叠加原理，进一步调整图像信号的对比度。有两种方式来实现叠加的原则，一是在空间领域，另一种是频域。它们中的每一个可以通过本发明的系统或方法来实现。为了实现空间补偿，本发明利用扫描校正板的结果来补偿由光传输系统散射的光能。可以根据叠加原理，根据图像空间中的相应像素的线性组合来表示对象空间中的像素。因此，通过提取线性组合的系数来获得。图像空间中所需图像的像素乘以补偿矢量，本发明在空间域中产生具有鲜明对比度的图像。为了实现频域补偿，本发明得到校正板的扫描结果并将其转换为频率形式。因此，通过提取扫描校正板的结果的频率形式的振幅和相位角来获得补偿矢量。将所需图像扫描成频率形式的结果，然后将其除以补偿矢量。获得频率形式的期望图像。采取频率形式的期望图像的逆变换，结果在空间域中变换，并且可以以鲜明的对比度进行处理或显示。

9. 发明授权

US06348946B1 Video conferencing with video accumulator array VAM memory 失效
标题翻译：具有视频累加器阵列VAM存储器的视频会议
公开(公告)号：US06348946B1
公开(公告)日：2002-02-19
申请号：US08911600
申请日：1997-08-14
申请人： Joseph Claude Caci
发明人： Joseph Claude Caci
IPC分类号： H04N5202
CPC分类号： G06T1/60
摘要： In a video conferencing system, digital data representing pixels of a selected scene are stored in a Video accumulator Array Memory cells (VAM), each cell having memory with several register structures and having the capability of processing the digital data to facilitate compression of the digital data. The VAM has the ability to tell the processor information about the temporal nature of the video data without requiring the processor to first read the data and then test the data. In accordance with the present invention, the capability of processing the video data is designed directly in the memory function as they are stored. The memory array, by providing a capacity of temporal processing wherein the digital data in one video frame can be logically interacted with another video frame later in time, can make a significant reduction in the bandwidth required to transmit a video frame. In a scheme for representing gray scale luminosity, the luminosity is digitally represented by the plus and minus differences from the mid point of the gray scale. A color video camera, in addition to generating color separation pixel values, also generates gray scale luminosity values which include a steady state infrared component provided by steady sate illumination of scene in order to reduce the adverse effects of fluorescent lighting.
摘要翻译：在视频会议系统中，表示所选场景的像素的数字数据被存储在视频累加器阵列存储单元（VAM）中，每个单元具有多个寄存器结构的存储器，并具有处理数字数据以便于压缩数字数据。 VAM能够告诉处理器有关视频数据的时间性质的信息，而不需要处理器首先读取数据，然后测试数据。根据本发明，处理视频数据的能力在它们被存储时直接设计在存储器功能中。存储器阵列通过提供时间处理的能力，其中一个视频帧中的数字数据可以在时间上稍后与另一视频帧进行逻辑地交互，可以显着降低发送视频帧所需的带宽。在用于表示灰度光度的方案中，亮度由与灰度中点的正负差数字表示。彩色摄像机除了产生色彩分离像素值之外，还产生灰度级亮度值，其包括由场景的稳定照度提供的稳态红外分量，以减少荧光照明的不利影响。

10. 发明授权

US06633343B2 Dynamic gamma correction apparatus 失效
标题翻译：动态伽马校正装置
公开(公告)号：US06633343B2
公开(公告)日：2003-10-14
申请号：US09803660
申请日：2001-03-12
申请人： Keiichi Ito , Atsuhisa Kageyama , Nobutaka Okada , Katsuya Ishikawa , Hidetoshi Suzuki , Hisao Kunitani , Yuki Kakuya
发明人： Keiichi Ito , Atsuhisa Kageyama , Nobutaka Okada , Katsuya Ishikawa , Hidetoshi Suzuki , Hisao Kunitani , Yuki Kakuya
IPC分类号： H04N5202
CPC分类号： H04N5/202
摘要： An appropriate correction quantity is obtained for a video luminance signal on an individual video basis with a characteristic value, like the maximum or average value, of the luminance signal taken into account, thereby performing gray scale correction more effectively. A dynamic gamma correction apparatus for performing a correction on a video luminance signal includes: a correction start point control section for obtaining a correction start point, which is a lower limit of a given correction range, in accordance with a characteristic value of the luminance signal; a gamma correction quantity calculating section for obtaining a provisional correction quantity for the luminance signal to be corrected using the correction start point and the luminance signal; a gamma correction gain control section for obtaining a gain for the provisional correction quantity in accordance with the characteristic value of the luminance signal; a multiplier for obtaining a product of the provisional correction quantity and the gain as a gamma correction quantity; and an adder for obtaining a sum of the luminance signal and the gamma correction quantity and outputting the sum. The correction start point and the gain for the provisional correction quantity are controllable in accordance with the characteristic value of the luminance signal. Thus, an appropriate gamma correction quantity can be obtained as a final correction quantity.
摘要翻译：通过考虑到亮度信号的特性值（如最大值或平均值），在单个视频基础上获得适当的校正量，从而更有效地执行灰度校正。用于对视频亮度信号执行校正的动态伽马校正装置包括：校正开始点控制部分，用于根据亮度信号的特征值获得作为给定校正范围的下限的校正开始点 ; 伽马校正量计算部分，用于使用校正开始点和亮度信号获得要校正的亮度信号的临时校正量; 伽马校正增益控制部分，用于根据亮度信号的特征值获得临时校正量的增益; 用于获得临时校正量和增益的乘积作为伽马校正量的乘法器; 以及用于获得亮度信号和伽马校正量之和并输出该和的加法器。校正开始点和临时校正量的增益根据亮度信号的特征值是可控的。因此，可以获得适当的伽马校正量作为最终校正量

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式