opencv生成随机图像

python

import cv2
import numpy
import os
 
#产生随机数组
randomByteArray = bytearray(os.urandom(120000))
flatNumpyArray = numpy.array(randomByteArray)
 
#数组转换为一个300*400的灰度图像
grayImage = flatNumpyArray.reshape(300,400)
cv2.imwrite('RandomGray.png',grayImage)
 
#数组转换为一个100*400的彩色图像
bgrImage = flatNumpyArray.reshape(100,400,3)
cv2.imwrite('RandomColor.png',bgrImage)

C++

#include
#include

int main(){
	cv::Mat img = cv::Mat::zeros(cv::Size(320, 240), CV_8UC3);
	// CV_8UC3生成彩色图, CV_8UC1生成灰度图
	cv::randu(img, cv::Scalar::all(0), cv::Scalar::all(255));
	if (img.empty()){
		std::cout << "image is empty" << std::endl;
	}
	else{
		cv::imshow("random image generated", img);
	}
	cv::waitKey(3000);
	return 0;
}