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1.发明授权Video timing system which has signal delay compensation and which is responsive to external synchronization 失效具有信号延迟补偿并且响应于外部同步的视频定时系统
公开(公告)号：US4803553A
公开(公告)日：1989-02-07
申请号：US143110
申请日：1988-01-11
CPC分类号： H04N5/073
摘要： A video timing system is provided for clocking an imaging sensor as well as for clocking a downstream video monitor and NTSC encoder. Due to signal processing delays between the sensor and the monitor/encoder, the first pixel is clocked out of the sensor prior to beginning the rasters of the monitor and encoders by a time period which is equal to the signal processing delay. In this manner, the first pixel out of the sensor is displayed at the beginning of the video rasters. In response to a video signal from an external source, the video monitor and NTSC timing is adjusted so as to be synchronous with the external source. Timing adjustment of the sensor is facilitated by the fact that the time period for early clocking of the sensor is unchanged whether or not the external video signal is present.
摘要翻译： 提供了一种视频定时系统，用于对成像传感器进行计时，并为下行视频监视器和NTSC编码器提供时钟。 由于传感器和监视器/编码器之间的信号处理延迟，在监视器和编码器的栅极开始等于信号处理延迟的时间周期之前，第一个像素从传感器中计时。 以这种方式，在视频光栅开始处显示传感器外的第一像素。 响应于来自外部源的视频信号，调整视频监视器和NTSC定时以与外部源同步。 无论外部视频信号是否存在，传感器的早期计时的时间段都不变，传感器的定时调整便利。
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2.发明授权
公开(公告)号：US5363318A
公开(公告)日：1994-11-08
申请号：US855280
申请日：1992-03-23
申请人： David K. McCauley
发明人： David K. McCauley
CPC分类号： H04N17/04 , H04N1/6027 , H04N1/6033
摘要： A system and a method in which channel independent linear transfer functions or calibration curves for color devices such as printers, scanners and displays are individually created. The calibration curves are created using a low cost light intensity sensor. Scaling constants are determined and desired linear aim response curves are scaled together to maintain a desired color balance. The color saturation effects are also removed by scaling or normalizing to some maximum input drive level that does not saturate any of the colors. The characterization curves are rotated about the desired linear aim response curves to create compensation curves for each the characterization curves adapted to the particular device response characteristics. The dynamic range maximized, linearized, color balanced and saturation compensation curves are loaded into conversion tables which convert input values into the appropriate output values.
摘要翻译： 单独创建用于诸如打印机，扫描器和显示器之类的彩色设备的通道独立线性传递函数或校准曲线的系统和方法。 使用低成本光强度传感器创建校准曲线。 确定缩放常数，并且将所需的线性目标响应曲线缩放在一起以保持期望的颜色平衡。 通过缩放或归一化到不会使任何颜色饱和的某些最大输入驱动级别也可以消除色彩饱和效应。 表征曲线围绕期望的线性目标响应曲线旋转，以针对特定装置响应特性的每个特征曲线创建补偿曲线。 将动态范围最大化，线性化，色彩平衡和饱和补偿曲线加载到将输入值转换为适当输出值的转换表中。
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公开(公告)号：US5410338A
公开(公告)日：1995-04-25
申请号：US175169
申请日：1993-12-29
CPC分类号： G06K15/1204 , B23K26/0838 , B41J19/202 , H04N1/0473 , H04N1/1008 , H04N1/1135 , H04N2201/0471 , H04N2201/04756
摘要： A method and apparatus is disclosed for adapting a low precision lead screw to perform in a high precision application by compensating for cyclical positioning errors that are produced by the lead screw. A stage assembly driven by a stepper motor is individually characterized and its inherent cyclical positioning error is stored in a memory device. The memory device is used to control a driving circuit that controls an operation of the stepper motor. The stepper motor is driven in a non-uniform manner that is complementary to a pattern of cyclical positioning errors in the stage assembly. As a consequence, a stage, driven by the lead screw, moves in a uniform manner. The system is disclosed in the context of a printer in which a receiver is driven at a uniform rate by an inexpensive low precision lead screw.
摘要翻译： 公开了一种用于通过补偿由导螺杆产生的周期性定位误差来适应低精度丝杠以执行高精度应用的方法和装置。 由步进电机驱动的舞台组件被单独表征，并且其固有的周期性定位误差被存储在存储装置中。 存储器件用于控制控制步进电机的操作的驱动电路。 步进电机以不均匀的方式驱动，与舞台组件中的循环定位误差的图案互补。 因此，由导螺杆驱动的平台以均匀的方式移动。 该系统在打印机的上下文中公开，其中通过廉价的低精度丝杠以均匀的速率驱动接收器。
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公开(公告)号：US5117283A
公开(公告)日：1992-05-26
申请号：US542619
申请日：1990-06-25
IPC分类号： H04N9/75
CPC分类号： H04N9/75
摘要： An image capture and compositing apparatus for a photobooth (10) photographs a customer against a fixed color background (28), extracts the customer from that image and then inserts the extracted customer image into an arbitrary background image in such a manner that there are no noticeable artifacts between the inserted image and the background image and so that it appears that the subject was actually situated in the background scene when photographed. The imagery processing mechanism employed generates a pair of masks, one of which is associated with the foreground image and the other of which is associated with the background image. These masks are used to extract the subject (160) from an image of the subject against a reference color backdrop, to define what portion of the background image is to be blanked out and to controllably blend the border of the inserted subject image with the background image. The photobooth contains a customer lighting system (50,42) located above and behind the position where the customer is seated. A separate backdrop lighting system (32) is located behind the customer and illuminates a blue reference backdrop against which the customer is photographed and which is photographed per se to provide a reference for mask production.
摘要翻译： 用于照相机（10）的图像捕获和合成装置（10）针对固定颜色背景（28）拍摄客户，从该图像中提取客户，然后将提取的顾客图像插入任意背景图像中，使得没有 插入的图像和背景图像之间的明显的伪影，并且使得当拍摄时，被摄体实际上位于背景场景中。 采用的图像处理机制产生一对掩模，其中一个掩模与前景图像相关联，另一个与背景图像相关联。 这些掩模用于从对象的图像相对于参考颜色背景提取被摄体（160），以限定背景图像的哪些部分被消隐，并且可控地将插入的被摄体图像的边界与背景混合 图片。 照相机包含位于客户所在位置上方和后方的客户照明系统（50,42）。 单独的背景照明系统（32）位于客户的后面，并照亮了蓝色参考背景，客户拍摄的背景照片，以及为了提供掩模生产的参考。
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5.发明授权Dual mode gen-lock system which automatically locks to color burst or to sync information 失效双模式锁定系统，自动锁定到彩色突发或同步信息
公开(公告)号：US4847678A
公开(公告)日：1989-07-11
申请号：US142628
申请日：1988-01-11
申请人： David K. McCauley
发明人： David K. McCauley
CPC分类号： H04N9/45
摘要： A dual mode gen-lock system generates high frequency clocking pulses which are automatically synchronized to an external video signal. During the presence of color burst information in the external video signal, the clocking pulses are synchronized to the color burst. However in the absence of the color burst, the clocking pulses are synchronized to the horizontal sync pulses of the external video signal. This is accomplished by providing a phase locked loop which has an oscillator which free runs at the desired clock frequency, and which has a phase detector for comparing the phase difference between a selected portion of the PLL reference signal and a selected portion of either the color burst or horizontal sync pulses.
摘要翻译： 双模式锁定系统产生自动同步到外部视频信号的高频时钟脉冲。 在外部视频信号中出现色同步信息的同时，时钟脉冲与色同步信号同步。 然而，在没有色同步信号的情况下，时钟脉冲与外部视频信号的水平同步脉冲同步。 这是通过提供一种锁相环来实现的，所述锁相环具有在期望的时钟频率下自由运行的振荡器，并且具有相位检测器，用于比较PLL参考信号的选定部分和颜色的选定部分之间的相位差 突发或水平同步脉冲。
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