一、霍夫变换 霍夫变换是一种特征检测(feature extraction),被广泛应用在图像分析(image analysis)、计算机视觉(computer vision)以及数位影像处理(digital image processing)。霍夫变换是用来辨别找出物件中的特征,例如:线条。他的算法流程大致如下,给定一个物件、要辨别的形状的种类,算法会在参数空间(parameter space)...
梯度幅度相似性偏差 Gradient Magnitude Similarity Deviation (GMSD) 盲/无参考图像空间质量评估器 Blind/Referenceless Image Spatial Quality Evaluation (BRISQUE) 这5种图像质量评价算法中,除了BRISQUE是无参考图像质量评价算法外,其他都是全参考图像质量评价。本文不具体介绍这些算法的原理,仅介绍这些算法的应用。想...
rint('Type of the image : ',type(pic))print()print('Shape of the image : {}'.format(pic.shape))print('Image Hight {}'.format(pic.shape[0]))print('Image Width {}'.format(pic.shape[1]))print('Dimension of Image {}'.format(pic.ndim)) 其输出 Type of the image :<class 'imag...
}*/Mat result = Mat::zeros(src.size(), src.type());for(introw =0; row < height; row++) {//使用指针遍历uchar* current_row = src.ptr<uchar>(row); uchar* result_row = result.ptr<uchar>(row);//使用指针控制图像复制输出for(intcol =0; col < width; col++) {if(dim ==3) {i...
pic=image io.imread('img/parrot.jpg') gamma=2.2# Gamma < 1 ~ Dark ; Gamma > 1 ~ Bright gamma_correction=((pic/255)**(1/gamma)) plt.figure(figsize=(5,5)) plt.imshow(gamma_correction) plt.axis('off'); 伽马校正的原因|Reason for Gamma Correction ...
void RandomLineDemo() { RNG rng(12345); Point pt1, pt2; Mat new_img = Mat::zeros(bgImage.size(), bgImage.type()); for (int i = 0; i < 100000;i++) { //随机生成的两个端点 pt1.x = rng.uniform(0, bgImage.cols); pt2.x = rng.uniform(0, bgImage.cols); pt1.y = ...
importnumpyasnppic=imageio.imread('F:/demo_2.jpg') fig,ax=plt.subplots(nrows=1,ncols=3,figsize=(15,5)) forc,axinzip(range(3),ax):# create zero matrixsplit_img=np.zeros(pic.shape,dtype="uint8")#'dtype'by default:'numpy.float64'# assing each channel split_img[:,:,c]=pic[...
Image Analysis and Computer Vision with OpenCVdoi:10.1007/978-1-4842-3913-1_14In the previous chapters, the analysis of data was centered entirely on numerical and tabulated data, while in the previous one we saw how to process and analyze data in textual form. This book...Fabio Nelli...
3、Contour analysis:简单的代表边缘,以便于我们形成一个几何图形 我们使用cv::inRang方法来区分前景区域和背景区域,在使用cv::Canny方法来画出边缘部分,最后使用cv::findContours来找到这些轮廓,并使用cv::boundingRect来画出矩形框住这些轮廓。 2、直方图分析 ...
if( !srcImage1.data ) { printf("读取srcImage1错误~! \n"); return false; } if( !logoImage.data ) { printf("读取logoImage错误~! \n"); return false; } // 【2】定义一个Mat类型并给其设定ROI区域 Mat imageROI= srcImage1(Rect(200,250,logoImage.cols,logoImage.rows)); ...