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Description: DFT进行频谱分析时的三种现象
1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。
采样前加低通滤波器防混叠
2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。
改用其他窗函数（非矩形）改善泄漏。
3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。-DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.
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Size: 148801 |
Author: qinyang |
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Description: 程序是基于d3d开发的，开发工具vc++，包括画直线、反走样直线、画圆、画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等-are based on d3d development, development tools vc, including line drawing, anti-aliasing line, Circle. painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, texture, etc.
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Size: 1551116 |
Author: 付金 |
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Description: 本原代码集是我对计算机图形学的编程实践，包括画直线、反走样直线、画圆、画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等-primitive code sets for my computer graphics programming practice, including painting line, anti-aliasing straight Circle, painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, textures, etc.
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Size: 2434931 |
Author: 卢峰 |
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Description: 图形的反混淆算法-graphics anti-aliasing algorithms
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Size: 38735 |
Author: 张林 |
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Description: EMD使用当中解决模态混叠的英文文章，是法国人G.rilling的原著，有很大的参考价值-EMD use them to solve modal aliasing articles in English, French G.rilling in the original, have great reference value
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Size: 454522 |
Author: 张楠 |
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Description: 本原代码集是我对计算机图形学的编程实践，包括画直线、反走样直线、画圆、画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等
-primitive code is the set of computer graphics programming practice, including line drawing, anti-aliasing line, Circle. painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, texture, etc.
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Size: 31343 |
Author: 李辉 |
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Description: gpio驱动
leddrv.c为驱动源程序
writeled.c为应用程序
writeled.c 编译方式 arm-elf-gcc -Wall -O2 -Wl,-elf2flt -o writeled writeled.c
leddrv.c 编译方式 arm-elf-gcc -D__KERNEL__ -I你的uClinux目录/linux-2.4.x/include-Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common -fno-common -pipe -fno-builtin -D__linux__ -DNO_MM -mapcs-32 -march=armv4 -mtune=arm7tdmi -mshort-load-bytes -msoft-float -DMODULE -c -o leddrv.o leddrv.c
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Size: 2108 |
Author: zhengbo |
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Description: 计算机图形学的编程实践，包括画直线、反走样直线、画圆、 画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等-computer graphics programming practice, including painting line, anti-aliasing straight Circle, painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, textures, etc.
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Size: 29542 |
Author: chxyike |
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Description: For those of you who don t know, mip-mapping is a form of anti-aliasing that is used in many 3D rendering engines. It prevents the well-known interference pattern that occurs on detailed textures, known as the moir?pattern . This happens because when the texture is far enough away, there are more texels (texture pixels) then there are pixels to be rendered on the screen. This means that some texels get skipped over, and visual information is lost.
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Size: 3443 |
Author: Archen |
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Description: 平滑特效字体控件包是一个基于平滑（Anti-aliasing）和特效（Effect）字体
技术的控件包，支持透明、半透明、阴影、模糊、渐变色、字体纹理、噪声、轮
廓字等特效。
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Size: 270527 |
Author: 张峰 |
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Description: Add myaa.m to your path and enjoy anti-aliased professionally looking graphics in Matlab at any time. Myaa works with any kind of graphic (3-D, plots, scatterplots, ...) and even adds anti-aliasing to text, ui controls and grids. Myaa is ideal for complex, cluttered and saturated plots.
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Size: 273556 |
Author: Alex Qun |
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Description: 一种比较好的抗锯齿算法
Add myaa.m to your path and enjoy anti-aliased professionally looking graphics in Matlab at any time. Myaa works with any kind of graphic (3-D, plots, scatterplots, ...) and even adds anti-aliasing to text, ui controls and grids. Myaa is ideal for complex, cluttered and saturated plots.
See attached screenshot for a demonstration. More examples included in the code, just run help myaa .
Curiosa:
For those of you who publish your code often, an undocumented anti-aliasing option is included in the snapnow.m function in Matlab. To publish a file called test.m you can do:
opts.figureSnapMethod = antialiased
publish( test.m ,opts)
However, you will have more control over the process using myaa, which is also the best choice when using Matlab interactively.
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Size: 273569 |
Author: zzn |
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Description: 一个简易的反走样线段绘制程序，给出了一个通用的wu象素解决方案。程序启动后，在窗口上任一点点击一下，然后分别用钩选反走样和不钩选可以绘制直线，可以看见反走样的效果。-a simple line drawing anti-aliasing procedures, is a common wu pixel solution. After commencement, 1:00 office window click, and then using anti-aliasing Senators and Congressmen can draw straight lines, we can see the effect of anti-aliasing.
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Size: 172136 |
Author: 黄欣 |
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Description: 包括画直线、反走样直线、画圆、画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等。由于精力有限，未对原码做任何注释。出于简化编程的考虑，许多地方指定了常数，未做通用处理。还包含一个OpenGL教程-including painting line, anti-aliasing straight Circle, painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, textures, etc.. Because of the limited energy, the original code did not make any notes. To simplify programming for consideration, in many places designated constant, GM declined to handle. Also includes an OpenGL Guide
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Size: 781814 |
Author: 花阿花 |
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Description: 本原代码集是对计算机图形学的编程实践，包括画直线、反走样直线、画圆、画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等。出于简化编程的考虑，许多地方指定了常数，未做通用处理。解压缩后建立gui16目录，在其下有原代码和工程文件。在gui16下建立release目录，其下有一可执行文件及其所须的位图及模型文件。如在release目录之外执行程序，必须复制所需位图及模型文件。内含-primitive code of computer graphics programming practice, including painting line, anti-aliasing straight Circle, painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, textures, etc.. To simplify programming for consideration, in many places designated constant, GM declined to handle. Decompress gui16 established after the catalog under the original code and engineering documents. Established in gui16 release directory, under which an executable file and the necessary bitmap, and model documents. If the release catalog implementation procedures, must copy the necessary bitmap and model documents. Intron
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Size: 28737 |
Author: 耿均 |
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Description: 利用VC++编写图形图象处理,比如平移,比例,旋转,错切,裁剪,填充,反走样等等.具体操作鼠标左键画多边行的各个顶点,右键连线形成多边行.-VC prepared graphics image processing, such as translation, proportion, rotation, the wrong cutting, cutting, filling, anti-aliasing, etc.. The specific mouse button paintings in various multilateral OK vertices, right connections formed multilateral OK.
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Size: 75555 |
Author: wysh |
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Description: 本例功能是显示一个由反走样处理的线段组成的八面体-functions of the cases showed an anti-aliasing by the Line of octahedral
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Size: 57594 |
Author: 张旭 |
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Description: 图象处理软件比如平移,比例,旋转,错切,裁剪,填充,反走样等等.具体操作鼠标左键画多边行的各个顶点,右键连线形成多边行-image processing software such as translation, proportion, rotation, the wrong cutting, cutting, filling, anti-aliasing, etc.. The specific mouse button paintings in various multilateral OK vertices, right connections formed multilateral OK
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Size: 700791 |
Author: 武世侯 |
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Description: 本原代码集是对计算机图形学的编程实践，包括画直线、反走样直线、画圆、画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等。出于简化编程的考虑，许多地方指定了常数，未做通用处理。解压缩后建立gui16目录，在其下有原代码和工程文件。在gui16下建立release目录，其下有一可执行文件及其所须的位图及模型文件。如在release目录之外执行程序，必须复制所需位图及模型文件。内含r-primitive code of computer graphics programming practice, including painting line, anti-aliasing straight Circle, painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, textures, etc.. To simplify programming for consideration, in many places designated constant, GM declined to handle. Decompress gui16 established after the catalog under the original code and engineering documents. Established in gui16 release directory, under which an executable file and the necessary bitmap, and model documents. If the release catalog implementation procedures, must copy the necessary bitmap and model documents. R intron
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Size: 28039 |
Author: 万方 |
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Description: 计算机图形算法演示 包括画直线、反走样直线、画圆、画椭圆、画矩形、画多边形、矩形填充、多边形填充、3D变换、光照、贴图等。-computer graphics algorithms demonstration included painting line, anti-aliasing straight Circle, painted oval, rectangular painting, drawing polygon, rectangle filling, polygon filling, 3D transformation, lighting, textures, etc..
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Size: 28039 |
Author: 张春民 |
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