canny算法

自己画的一条简单的Bezier曲线，通过四个控制点（控制点可自行选取）(She painted a simple Bezier curve through four control points (control points can be selected as their own))

图像拾取演示，精选ios编程学习源码，很好的参考资料。(Image pickup demonstration, selection of learning IOS programming source code, a good reference.)

边缘检测的各种经典算法，很值得一看。机会不容错过。快来看呀。(edge detection algorithm for the classic, is an eye-catcher. The opportunity should not be missed. Come see ah.)

能量检测法是一种比较简单的信号检测方法[1]， 属于信号的非相干的检测， 直接对时域信号采样值求模，然后平方即可得到；或利用FFT转换到频域，然后对频域信号求模平方也可得到。它无需知道检测信号的任何先验知识，对信号类型也不作限制。 实际上，能量检测是在一定频带范围内作能量积累，如果积累的能量高于一 定的门限，则说明信号的存在；如果低于一定的门限，则说明仅有噪声。能量检 测的出发点是信号加噪声的能量大于噪声的能量。能量检测方法对信号没有作任何假设，是一种盲检算法。 此代码“利用FFT转换到频域，然后对频域信号求模平方”方法来实现对用户的检测。(In fact, energy detection is used for energy accumulation in a certain frequency range. If the accumulated energy is higher than a certain threshold, the existence of the signal is indicated. If the threshold is lower than the threshold, then only noise is indicated. The starting point of energy detection is that the energy of signal plus noise is greater than that of noise. The energy detection method does not make any assumptions about the signal, and it is a blind detection algorithm. This code "converts the frequency domain into the frequency domain by FFT, then calculates the square of the square of the frequency domain signal" to realize the detection of the user.)

关于大视场的视觉标定方法，相对于目前很多近距离的标定，很有借鉴作用(tisi is a paper about fast calibration for binocular vision measuring system,and it s with a large field)

计算信噪比的测试程序代码，利用对比敏感度函数（CSF）测量失真图像的空间频率。(Calculation of the test code SNR, the contrast sensitivity function (CSF) measurement of the spatial frequency of image distortion.)

利用DNA加密，将图像加密，啊啊啊啊啊啊啊啊啊啊(Encrypting the image by DNA and encrypting the image)

说明：  图像处理 形态学分割 腐蚀 开运算和闭运算先腐蚀后膨胀先膨胀后腐蚀 膨胀(Morphological segmentation)

说明：  张正友标定方法的代码，已经包含了优化等情况，直接输入变可获得(calibration method code, Optimization has been included, direct input variable can be obtained)

此M文件主要利用区域生长和边缘检测进行图像分割(image segment by region grow )