读取图片，将图片的像素改变，并显示图片

#include <opencv2\core\core.hpp>
#include <opencv2\imgproc\imgproc.hpp>
#include <opencv2\opencv.hpp>
#include <opencv2\highgui\highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std;
int main(int argc, char** args)
{
	Mat image = imread("pic.png");
	if (image.empty())
	{
		cout << "不能加载图像..." << std::endl;
		return -1;
	}

	Mat dst;
	cvtColor(image, dst, CV_BGR2GRAY); //将image图片转换成灰度图

	int height = image.rows; //获取图片的行
	int width = image.cols; //获取图片的列
	int channels = image.channels(); //获取图片的像素通道
	printf("height=%d,width=%d channels=%d", height, width, channels);


	for (int row = 0; row < height; row++) //遍历所有像素，并设置像素值
	{
		for (int col = 0; col < width; col++)
		{
			if (channels == 3)//
			{
				//image.at<Vec3b>(row, col)[0] = 0;//blue 通道
				//image.at<Vec3b>(row, col)[1] = 0;//green 通道
				//image.at<Vec3b>(row, col)[2] = 255 - image.at<Vec3b>(row, col)[2];// red 通道

				//image.at<Vec3b>(row, col)[0] = 255 - image.at<Vec3b>(row, col)[0];//blue 通道
				//image.at<Vec3b>(row, col)[1] = 255 - image.at<Vec3b>(row, col)[1];//green 通道
				//image.at<Vec3b>(row, col)[2] = 255 - image.at<Vec3b>(row, col)[2];// red 通道  grayim.at<uchar>(i,j) = (i+j)%255;

				image.at<Vec3b>(row, col)[0] = 0;//blue 通道
				image.at<Vec3b>(row, col)[1] = 255 - image.at<Vec3b>(row, col)[1];//green 通道
				image.at<Vec3b>(row, col)[2] = 0;// red 通道

				//image.at<Vec3b>(row, col)[1] = 0;//green 通道
				//image.at<Vec3b>(row, col)[2] = 0;// red 通道

			}
			//else if (channels==1)
			//{
			//	dst.at<uchar>(row, col) = 255 - dst.at<uchar>(row, col);
			//}
		}
	}
	namedWindow("输出图像-2", CV_WINDOW_AUTOSIZE);
	imshow("输出图像-2", image);
	waitKey(0);
	return 0;
}

 

 

 

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AfrikaansAlbanianAmharicArabicArmenianAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanCebuanoChichewaChinese (Simplified)Chinese (Traditional)CorsicanCroatianCzechDanishDutchEnglishEsperantoEstonianFilipinoFinnishFrenchFrisianGalicianGeorgianGermanGreekGujaratiHaitian CreoleHausaHawaiianHebrewHindiHmongHungarianIcelandicIgboIndonesianIrishItalianJapaneseJavaneseKannadaKazakhKhmerKoreanKurdishKyrgyzLaoLatinLatvianLithuanianLuxembourgishMacedonianMalagasyMalayMalayalamMalteseMaoriMarathiMongolianMyanmar (Burmese)NepaliNorwegianPashtoPersianPolishPortuguesePunjabiRomanianRussianSamoanScots GaelicSerbianSesothoShonaSindhiSinhalaSlovakSlovenianSomaliSpanishSundaneseSwahiliSwedishTajikTamilTeluguThaiTurkishUkrainianUrduUzbekVietnameseWelshXhosaYiddishYorubaZulu

 

 

 

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