公开(公告)号：US08107752B2

公开(公告)日：2012-01-31

申请号：US12147649

申请日：2008-06-27

申请人： Yueguang Jiao ,  Zihua Guo ,  Wei Liu

发明人： Yueguang Jiao ,  Zihua Guo ,  Wei Liu

IPC分类号： G06K9/36

CPC分类号： H04N19/90 ,  H04N19/13 ,  H04N19/174 ,  H04N19/186 ,  H04N19/436 ,  H04N19/593

摘要： An image processing method and system that performs color space transformation on an image to be compressed and obtaining pixel values, performing intra-row differential pulse code modulation coding on the image pixel values to obtain numerical values, and determining whether each of the numerical values is within a preset range. Variable length coding is performed on the numerical value obtained by using a fixed code table if the numerical value is within the range, variable length and by using a dynamic code table if it is not. Low algorithm complexity and fast processing meets the requirement of real-time video transmission. The pixel components of the image can be processed in parallel and adjacent processing steps can be performed in the same clock frequency, thereby remarkably reducing difficulty and cost in FPGA or chip implementation.

摘要翻译： 一种在要压缩的图像上执行色彩空间变换并获得像素值的图像处理方法和系统，对图像像素值执行行内差分脉冲编码调制编码以获得数值，并且确定每个数值是否为 在预设范围内。 如果数值在范围，可变长度内，并且使用动态代码表（如果不是），则通过使用固定代码表获得的数值执行可变长度编码。 算法复杂度低，处理速度快，满足实时视频传输的要求。 可以并行地处理图像的像素分量，并且可以在相同的时钟频率中执行相邻的处理步骤，从而显着降低FPGA或芯片实现中的难度和成本。

公开(公告)号：US20090153561A1

公开(公告)日：2009-06-18

申请号：US12336316

申请日：2008-12-16

申请人： Chengkun Sun ,  Hongwei Li ,  Fei Zhou ,  Yueguang Jiao

发明人： Chengkun Sun ,  Hongwei Li ,  Fei Zhou ,  Yueguang Jiao

IPC分类号： G06T11/20

CPC分类号： G06F3/1431

摘要： The present invention relates to a technique of capturing screen. It discloses a method for capturing screen based on WDDM, which is aimed at solving the problem that the existing techniques are not suitable for Vista. The method comprise the steps of outputting commands of drawing image by an image display processing engine; analyzing the commands of drawing image by a filter driver, determining whether a display adapter can execute the commands in accordance with the registered capacities of the display adapter, and transmitting the commands to the display adapter if the display adapter can execute the commands; generating image data to be displayed in accordance with the commands by the display adapter, and transmitting the generated image data back to the filter driver; and buffering the image data to be displayed in the filter driver. The present invention also discloses a computer system with a plurality of displays employing the method described above. The present invention can be easily implemented, and the captured screen image and the image on the local display terminal have the same image quality.

摘要翻译： 本发明涉及一种捕获屏幕的技术。 它公开了一种基于WDDM捕获屏幕的方法，该方法旨在解决现有技术不适用于Vista的问题。 该方法包括以下步骤：通过图像显示处理引擎输出绘图图像的命令; 分析由过滤器驱动器绘制图像的命令，确定显示适配器是否可以根据显示适配器的注册容量执行命令，并且如果显示适配器可以执行命令则将命令发送到显示适配器; 根据显示适配器的命令生成要显示的图像数据，并将生成的图像数据发送回过滤驱动器; 并缓冲要显示在过滤器驱动器中的图像数据。 本发明还公开了一种使用上述方法的具有多个显示器的计算机系统。 本发明可以容易地实现，并且捕获的屏幕图像和本地显示终端上的图像具有相同的图像质量。

公开(公告)号：US20090003690A1

公开(公告)日：2009-01-01

申请号：US12147649

申请日：2008-06-27

申请人： Yueguang Jiao ,  Zihua Guo ,  Wei Liu

发明人： Yueguang Jiao ,  Zihua Guo ,  Wei Liu

IPC分类号： G06K9/36

CPC分类号： H04N19/90 ,  H04N19/13 ,  H04N19/174 ,  H04N19/186 ,  H04N19/436 ,  H04N19/593

摘要： An image processing method and system that performs color space transformation on an image to be compressed and obtaining pixel values, performing intra-row differential pulse code modulation coding on the image pixel values to obtain numerical values, and determining whether each of the numerical values is within a preset range. Variable length coding is performed on the numerical value obtained by using a fixed code table if the numerical value is within the range, variable length and by using a dynamic code table if it is not. Low algorithm complexity and fast processing meets the requirement of real-time video transmission. The pixel components of the image can be processed in parallel and adjacent processing steps can be performed in the same clock frequency, thereby remarkably reducing difficulty and cost in FPGA or chip implementation.

摘要翻译： 一种在要压缩的图像上执行色彩空间变换并获得像素值的图像处理方法和系统，对图像像素值执行行内差分脉冲编码调制编码以获得数值，并且确定每个数值是否为 在预设范围内。 如果数值在范围，可变长度内，并且使用动态代码表（如果不是），则通过使用固定代码表获得的数值执行可变长度编码。 算法复杂度低，处理速度快，满足实时视频传输的要求。 可以并行地处理图像的像素分量，并且可以在相同的时钟频率中执行相邻的处理步骤，从而显着降低FPGA或芯片实现中的难度和成本。