(OwO)電腦圖學week09_4/19

Opencv

1.下載 OpenCV-2.1.0-win32-vs2008.exe

2.安裝時，Add PATH 選第二個，路徑用預設(亂改會不好處理

3.安裝後要將CodeBlocks重開

4.CodeBlocks內設定：Setting -> Compiler -> Search directories

• Include：Compiler，Add，C:\opencv2.1\include
• Lib：Linker，Add，C:\opencv2.1\lib
• Linker settings，Add，cv210、cxcore210、highgui210

OpenCV讀圖、秀圖

#include<opencv/highgui.h>///使用opencv的外掛

int main()

{

    IplImage * img=cvLoadImage("檔名.jpg"); ///讀圖

    cvShowImage("week09", img); ///秀圖

    cvWaitKey(0);///等任意按鍵繼續

}

結合OpenCV、OpenGL，圖檔要放在 freeglut\bin

#include<GL/glut.h>

#include<opencv/highgui.h>

void myTexture()

{

    IplImage * img=cvLoadImage("檔案.png");///讀圖

    cvShowImage("opencv", img);

    ///cvWaitKey(0);///可以不用寫，因為會被glutMainLoop()卡住

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

int main(int argc,char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week09 texture");

    glutDisplayFunc(display);

    myTexture();

    glutMainLoop();

}

貼圖

#include<GL/glut.h>

#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可

#include <opencv/cv.h>

#include <GL/glut.h>

int myTexture(char * filename)

{

    IplImage * img = cvLoadImage(filename); ///OpenCV讀圖

    cvCvtColor(img,img, CV_BGR2RGB); ///OpenCV轉色彩 (需要cv.h)

    glEnable(GL_TEXTURE_2D); ///1. 開啟貼圖功能

    GLuint id; ///準備一個 unsigned int 整數, 叫 貼圖ID

    glGenTextures(1, &id); /// 產生Generate 貼圖ID

    glBindTexture(GL_TEXTURE_2D, id); ///綁定bind 貼圖ID

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖T, 就重覆貼圖

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖S, 就重覆貼圖

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); /// 貼圖參數, 放大時的內插, 用最近點

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); /// 貼圖參數, 縮小時的內插, 使用最近點

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);

    return id;

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

int main(int argc,char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week09 texture");

    glutDisplayFunc(display);

    myTexture("檔案.jpg");

    glutMainLoop();

}