C语言 OpenCV实现柱面投影

目录

前言

在做全景拼接的时候，为了保持图片中的空间约束与视觉的一致性，需要进行柱面投影，否则离中心图像距离越远的图像拼接后变形越大。

柱面投影公式为

实现代码

针对彩色图像

int main(){cv::mat image1 = cv::imread("images/1.jpg", 1);if (!image1.data)return 0;imshow("image1", image1); mat imgout = mat(image1.rows, image1.cols, cv_8u柯岩c3);float w = image1.cols;float h = image1.rows;float f = 一光年是多少公里(w / 2) / atan(pi / 8); for (int i = 0; i < image1.rows; i++){for (int j = 0; j < image1.cols; j++){float x = j;float y = i;float x1 = f * atan((x - w / 2) / f) + f * atan(w / (2.0f * f));float y1 = f * (y - h / 2.0f) / sqrt((x - w / 2.0f) * (x - w / 2.0f) + f * f) + h / 2.0f; int col = (int)(x1 + 0.5f);//加0.5是为了四舍五入int row = (int)(y1 + 0.5f);//加0.5是为了四舍五入 if (col < image1.cols && row < image1.rows){imgout.at<vec3b>(row, c2021跨年图片ol)[0] = image1.at<vec3b>(i, j)[0];imgout.at<vec3b>(row, col)[1] = image1.at<vec3b>(i, j)[1];imgout.at<vec3b>(row, col)[2] = image1.at<vec3b>(i, j)[2];}}} imshow("imgout", imgout); waitkey(0);return 0;}

实现效果

针对灰度图像

cv::mat image1 = cv::imread("e:\\zcb_work\13\\pic2\\k.jpg", 0);if (!image1.data)return 0;imshow("image1", image1);cv::mat image2 = cv::imread("e:\\zcb_work\13\\pic2\\j.jpg", 0);if (!image2.data)return 0;imshow("imag中日甲午战争e2", image2); mat imgout1 = mat(image1.rows, image1.cols, cv_8uc1);imgout1.tto(0);mat imgout2 = mat(image2.rows, image2.cols, cv_8uc1);imgout2.tto(0);float w = image1.cols;float h = image1.rows;float f = (w / 2) / atan(pi / 8); for (int i = 0; i < image1.rows; i++){for 采购比价系统(int j = 0; j < image1.cols; j++){float x = j;float y = i;float x1 = f * atan((x - w / 2) / f) + f * atan(w / (2.0f * f));float y1 = f * (y - h / 2.0f) / sqrt((x - w / 2.0f) * (x - w / 2.0f) + f * f) + h / 2.0f; int col = (int)(x1 + 0.5f);//加0.5是为了四舍五入int row = (int)(y1 + 0.5f);//加0.5是为了四舍五入 if (col < image1.cols && row < image1.rows){imgout1.at<uchar>(row, col) = image1.at<uchar>(i, j);imgout2.at<uchar>(row, col) = image2.at<uchar>(i, j);//imgout.at<vec3b>(row, col)[1] = image1.at<vec3b>(i, j)[1];//imgout.at<vec3b>(row, col)[2] = image1.at<vec3b>(i, j)[2];}}} imshow("imgout1", imgout1);imshow("imgout2", imgout2);

实现效果

原图

柱面投影

用surf算法，特征检测，

合成这样，呵呵呵，

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