公开(公告)号：US06823091B2

公开(公告)日：2004-11-23

申请号：US09760173

申请日：2001-01-12

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: G06K932

CPC classification number: G06T3/4007 ,  G06T11/001

Abstract: A resampling system and method for producing a resampled destination image from a source image by solving coefficients for a cubic polynomial transition model between first and second adjacent source pixels from the sample values of the first and second samples and approximations of the first and second sample gradients at the first and second samples, respectively. Approximations of the first and second color gradients are based on a multiple of first and second color slopes, such as twice the value of the color slope. The first color slope is calculated from the sample values of a previous pixel and the first sample and the second sample slope is calculated from the sample values of a subsequent sample and the second sample. The resulting gradient approximations and sample values are used in the cubic transition model to calculate an output sample value for rendering a resampled destination image.

Abstract translation: 一种重采样系统和方法，用于通过从第一和第二采样的样本值和第一和第二采样梯度的近似值求解第一和第二相邻源像素之间的三次多项式转换模型的系数来从源图像产生重新采样的目标图像; 分别在第一和第二样品。 第一和第二颜色梯度的近似基于第一和第二颜色斜率的倍数，例如颜色斜率值的两倍。 从先前像素的样本值计算第一颜色斜率，并从后续样本和第二样本的样本值计算第一样本，并且计算第二样本斜率。 所得到的梯度近似值和采样值用于三次变换模型，以计算用于渲染重采样的目标图像的输出采样值。

公开(公告)号：US06765578B2

公开(公告)日：2004-07-20

申请号：US09944937

申请日：2001-08-30

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: G06T1100

CPC classification number: G06T3/4007 ,  G06T1/60 ,  G06T3/4023 ,  G09G5/006 ,  G09G5/363 ,  G09G2340/0414 ,  G09G2340/0421

Abstract: A resampling circuit and method where input sample values for samples arranged along a row of a source image are received by a row resampling circuit. The row resampling circuit calculates row output values which are provided to a column resampling circuit that calculates output sample values therefrom. The column resampling circuit includes a shift register that receives the row output values and shifts the row output values through the shift register as the row output samples are calculated. The shift register has a plurality of evenly spaced sample output terminals from which the row output values are sampled by an interpolation circuit for calculation of the output sample values.

公开(公告)号：US06233593B1

公开(公告)日：2001-05-15

申请号：US09195729

申请日：1998-11-18

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: G06F1710

CPC classification number: H03H17/06

Abstract: An improved FIR filter based upon squaring is used to self-determine a filter constant equal to the sum-of-squares of the filter coefficients. An input signal is forced to zero for T samples, where T is the number of accumulator cells in an accumulator stage, and at the end of such zero samples the output from the filter is latched as the filter constant for use in filtering the normal input signal. The FIR filter may also be placed in a co-processor mode, using a FIFO register between the input of the FIR filter and a processor bus. A CPU on the bus initiates the co-processor mode and loads data into the FIFO. When the FIFO has data the data is read out and input to the FIR filter. The output of the FIR filter is placed on the processor bus. To determine the values of the filter coefficients loaded in the FIR filter, the data loaded by the CPU is an impulse signal having T−1 zero samples before and after an impulse sample, the output for each sample representing one of the filter coefficients.

Abstract translation: 使用基于平方的改进的FIR滤波器来自定义等于滤波器系数的平方和的滤波器常数。 对于T个样本，输入信号被强制为零，其中T是累加器级中的累加器单元的数量，并且在这样的零采样结束时，来自滤波器的输出被锁存为用于滤波正常输入的滤波器常数 信号。 也可以使用FIR滤波器的输入端和处理器总线之间的FIFO寄存器将FIR滤波器置于协处理器模式。 总线上的CPU启动协处理器模式并将数据加载到FIFO中。 当FIFO具有数据时，数据被读出并输入到FIR滤波器。 FIR滤波器的输出放置在处理器总线上。 为了确定加载在FIR滤波器中的滤波器系数的值，由CPU加载的数据是在脉冲采样之前和之后具有T-1零样本的脉冲信号，每个采样的输出表示滤波器系数之一。

公开(公告)号：US5654762A

公开(公告)日：1997-08-05

申请号：US432350

申请日：1995-05-01

Applicant: Keith R. Slavin ,  Shane Ching-Feng Hu

Inventor： Keith R. Slavin ,  Shane Ching-Feng Hu

IPC: H03M7/16 ,  H04N7/26 ,  H04N7/30 ,  H04N7/18

CPC classification number: H03M7/16 ,  H04N19/51 ,  H04N19/60 ,  H04N19/13 ,  H04N19/91

Abstract: Block matching for picture motion estimation uses Gray codes, and preferably a new Hamming-2 Gray code where the bit pattern changes by only one bit for each step in the Gray code count sequence with the additional condition that all other codes are at least two bits different if not adjacent in the count sequence. The pixels for a reference block from a first picture frame and the pixels for a corresponding block within a search area of the next picture frame are each quantized and then converted to an appropriate Gray code. The Gray codes for corresponding pixels are compared to determine whether they are equal or adjacent to each other. If there is adjacency or equality a match signal is generated for that pixel which is tallied. The total tally for each reference block position within the search area is determined, with the maximum tally indicating a match between blocks from which picture motion estimation may be determined.

Abstract translation: 用于图像运动估计的块匹配使用格雷码，并且优选地是新的汉明-2格雷码，其中，格雷码计数序列中的每一步的位模式仅改变一位，附加条件是所有其他码至少为两位 在计数序列中不同，如果不相邻。 对来自第一图像帧的参考块的像素和下一个图像帧的搜索区域内的相应块的像素进行量化，然后被转换为适当的格雷码。 比较相应像素的格雷码，以确定它们是否相等或相邻。 如果存在相邻或相等的情况，则会为所计算的像素生成匹配信号。 确定搜索区域内的每个参考块位置的总计数，其中最大计数指示可以从其确定图像运动估计的块之间的匹配。

公开(公告)号：US5561616A

公开(公告)日：1996-10-01

申请号：US929039

申请日：1992-08-13

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: H03H17/06 ,  G06F17/10

CPC classification number: H03H17/06

Abstract: A FIR filter based upon squaring accumulates the sum of the squares of the samples of a digital input signal. The samples also are added to respective filter coefficients, squared and accumulated in a plurality of filter stages. The sum of the squares of the samples are subtracted, together with a constant that is the sum of the squares of the filter coefficients, from the output of the last filter stage to produce an output signal that is divided by two to produce the samples for a digital output signal.

Abstract translation: 基于平方的FIR滤波器累积数字输入信号的样本的平方和。 样本也被添加到各个滤波器系数中，在多个滤波器级中被平方并且累积。 将样本的平方和与来自最后一个滤波器级的输出的滤波器系数的平方和的常数一起减去，以产生除以2的输出信号，以产生用于 数字输出信号。

公开(公告)号：US4764721A

公开(公告)日：1988-08-16

申请号：US30760

申请日：1987-03-24

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: G01R13/20 ,  G01R13/30 ,  G01R13/34 ,  H04N17/00 ,  G01R15/08

CPC classification number: G01R13/345 ,  G01R13/30 ,  H04N17/00

Abstract: A method for locking scales to a waveform display uses reference points from the waveform to determine starting scale points. Based upon the starting scale points and the characteristics of the waveform the scales are calculated. Any changes in gain in the waveform are applied to the scales so that the scales change in direct proportion to the waveform. The field/line numbers of a television video signal are tracked and displayed on the waveform display to identify that portion of the waveform relative to a picture frame which is being displayed.

公开(公告)号：US07161515B2

公开(公告)日：2007-01-09

申请号：US11258237

申请日：2005-10-26

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: H03M1/84

CPC classification number: H03M1/1033

Abstract: A calibration system for calibrating a linearity corrector using the sum of filter products is proved, along with a method of calibrating the linearity corrector. The calibration system includes a first and second signal generator for introducing test signals into a signal processing system, such as an ADC. An acquisition memory and processor are provided for acquiring and analyzing the output of the signal processing system and then programming the filter coefficients into the linearity corrector. The method of calibration analyzes acquired intermodulation and harmonic components from the signal processing system and then finds the amplitude and phase response for the filters. The amplitude and phase response is then used to determine a set of filter coefficients.

Abstract translation: 证明了使用滤波器产品总和校准线性校正器的校准系统，以及校准线性校正器的方法。 校准系统包括用于将测试信号引入诸如ADC的信号处理系统中的第一和第二信号发生器。 提供采集存储器和处理器用于获取和分析信号处理系统的输出，然后将滤波器系数编程到线性校正器中。 校准分析方法从信号处理系统获取互调和谐波分量，然后找到滤波器的幅度和相位响应。 然后使用幅度和相位响应来确定一组滤波器系数。

公开(公告)号：US07151539B2

公开(公告)日：2006-12-19

申请号：US11388593

申请日：2006-03-24

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: G09G5/22 ,  G06K9/32 ,  G06K9/46

CPC classification number: G09G5/363 ,  G09G2340/0407

Abstract: A method and system for calculating resample output values from input samples and their associated sample values. A resampling circuit calculates a frequency value for a sine-wave model from a sample set of the input samples and determines whether the frequency value is in a frequency range. In the case where the frequency value is in the frequency range, a sinusoidal transition model is determined based on the sample set. However, if the frequency value is outside of the frequency range, a non-sinusoidal model is determined based on the sample set. The resampling circuit then calculates resample output values from the resulting sinusoidal or non-sinusoidal model.

公开(公告)号：US07053896B2

公开(公告)日：2006-05-30

申请号：US09779010

申请日：2001-02-07

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: G09G5/22 ,  G06K9/32

CPC classification number: G09G5/363 ,  G09G2340/0407

Abstract: A method and system for calculating resample output values from input samples and their associated sample values. A resampling circuit calculates a frequency value for a sine-wave model from a sample set of the input samples and determines whether the frequency value is in a frequency range. In the case where the frequency value is in the frequency range, a sinusoidal transition model is determined based on the sample set. However, if the frequency value is outside of the frequency range, a non-sinusoidal model is determined based on the sample set. The resampling circuit then calculates resample output values from the resulting sinusoidal or non-sinusoidal model.

公开(公告)号：US06795587B2

公开(公告)日：2004-09-21

申请号：US09911633

申请日：2001-07-23

Applicant: Keith R. Slavin

Inventor： Keith R. Slavin

IPC: G06K940

CPC classification number: G06T3/4023 ,  G06T3/403

Abstract: Asymmetric finite impulse response (FIR) filters are used to estimate gradients for re-sampling models used in image resizing. Better than conventional 3-tap symmetric FIR filters, these filters provide good edge and extended-frequency responses with good narrow peak sharpening characteristics. These filters emphasize accurate edge handling, where gradients are steepest, over accurate peak handling, where gradients are shallowest. This results in superior zone-plate test signals and better resized image quality.

Abstract translation: 不对称有限脉冲响应（FIR）滤波器用于估计用于图像调整大小的重新采样模型的梯度。 比传统的3抽头对称FIR滤波器更好，这些滤波器提供良好的边缘和扩展频率响应，具有良好的窄峰值锐化特性。 这些滤波器强调准确的边缘处理，其中梯度最陡峭，超过精确的峰值处理，其中梯度最浅。 这导致了优异的区域板测试信号和更好的调整大小的图像质量。