コンピューター サイエンスのクラスでは、次のような画像内の未知の数のエイリアンの位置とサイズを見つけるプログラムを作成することになっています: http://www-bcf.usc.edu/~stejada/ csci101/Pix/MARS2.jpg . 現在、次のコードがあります。
#include "Myro.h"
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include "alien.h"
#include <vector>
using std::cout;
using std::cin;
using std::endl;
using std::vector;
void trackBlob(PicturePtr &aPic, int x, int y);
int BlobSize(PicturePtr &aPic, int x, int y, vector<int>& xLocs, vector<int>& yLocs);
vector<alien> found;
int returned;
int main()
{
returned = 0;
cout << "Pick a picture to search 0-5, or choose 6 to quit" << endl;
int selection;
cin >> selection;
PicturePtr thePic;
// Choose a picture to search
bool selecting = true;
while (selecting) {
switch (selection) {
case 0:
thePic = makePicture("MARS.jpg");
selecting = false;
break;
case 1:
thePic = makePicture("MARS1.jpg");
selecting = false;
break;
case 2:
thePic = makePicture("MARS2.jpg");
selecting = false;
break;
case 3:
thePic = makePicture("MARS3.jpg");
selecting = false;
break;
case 4:
thePic = makePicture("MARS4.jpg");
selecting = false;
break;
case 5:
thePic = makePicture("MARS6.jpg");
selecting = false;
break;
case 6:
cout << "Terminating." << endl;
return 0;
default:
cout << "Invalid input. Please try again." << endl << endl;
break;
}// end switch
} // end while
// Find the aliens
cout << endl;
cout << "Pic size: " << getHeight(thePic) * getWidth(thePic) << endl << endl;
int numGreen = 0;
for (int i = 0; i < getWidth(thePic); i++) {
for (int j = 0; j < getHeight(thePic); j++) {
Pixel pix;
pix = getPixel(thePic,i,j);
// Check for alien color
if (pix.R >= 100 && pix.R <= 120 && pix.G >= 240 && pix.G <= 255 && pix.B >= 1 && pix.B <= 15) {
trackBlob(thePic,i,j);
numGreen++;
}
else if (pix.R >= 165 && pix.R <= 185 && pix.G >= 215 && pix.G <= 235 && pix.B >= 65 && pix.B <= 85) {
trackBlob(thePic,i,j);
numGreen++;
}
else if (pix.R >= 130 && pix.R <= 155 && pix.G >= 210 && pix.G <= 230 && pix.B >= 145 && pix.B <= 175) {
trackBlob(thePic,i,j);
numGreen;
}
else if (pix.R >= 27 && pix.R <= 47 && pix.G <= 265 && pix.G >= 245 && pix.B >= 1 && pix.B <= 10) {
trackBlob(thePic,i,j);
numGreen++;
}
else if (pix.R >= 240 && pix.R <= 255 && pix.G <= 240 && pix.G >= 255 && pix.B >= 25 && pix.B <= 45) {
trackBlob(thePic,i,j);
numGreen++;
}
else if (pix.R >= 235 && pix.R <= 255 && pix.G <= 245 && pix.G >= 210 && pix.B >= 200 && pix.B <= 230) {
trackBlob(thePic,i,j);
numGreen++;
}
else if (pix.R <= 240 && pix.R >= 210 && pix.G <=255 && pix.G >= 240 && pix.B >= 1 && pix.B <= 10) {
trackBlob(thePic,i,j);
numGreen++;
}
}
}
cout << endl << endl;
cout << "Number of Aliens: " << found.size() << endl;
for (int n = 0; n < found.size(); n++) {
cout << "Position of Alien #" << n << ": (" << found[n].x << "," << found[n].y << ")" << endl;
cout << "Size of Alien #" << n << ": " << found[n].size << endl;
}
cout << endl << endl << "Number pixels tried: " << numGreen << endl << endl;
cout << "Times blob returned: " << returned << endl;
show(thePic);
return 0;
}
void trackBlob(PicturePtr &aPic, int x, int y) {
// Just to be safe
Pixel aPixel = getPixel(aPic,x,y);
//if (aPixel.R == 0 && aPixel.G == 0 && aPixel.B == 0)
//return;
// Find the size of the alien
vector<int> xLocs;
vector<int> yLocs;
int size = BlobSize(aPic,x,y,xLocs,yLocs);
cout << "Blob size: " << size << endl;
returned++;
// Make sure it's big enough to be an alien
if (size < 5) {
return;
}
alien newAlien;
// Find the position
newAlien.x = 0;
for (int i = 0; i < xLocs.size(); i++) {
newAlien.x += xLocs[i];
}
newAlien.x = newAlien.x/xLocs.size();
newAlien.y = 0;
for (int j = 0; j < yLocs.size(); j++) {
newAlien.y += yLocs[j];
}
newAlien.y = newAlien.y/yLocs.size();
found.push_back(newAlien);
}
int BlobSize(PicturePtr &aPic, int x, int y, vector<int>& xLocs, vector<int>& yLocs)
{
if (x >= getWidth(aPic) || x < 0)
return 0;
Pixel pix = getPixel(aPic,x,y);
// Just to be safe
//if (pix.R == 0 && pix.G == 0 && pix.B == 0)
//return 0;
bool isAlien = false;
if (pix.R >= 100 && pix.R <= 120 && pix.G >= 240 && pix.G <= 255 && pix.B >= 1 && pix.B <= 15)
isAlien = true;
else if (pix.R >= 165 && pix.R <= 185 && pix.G >= 215 && pix.G <= 235 && pix.B >= 65 && pix.B <= 85)
isAlien = true;
else if (pix.R >= 130 && pix.R <= 155 && pix.G >= 210 && pix.G <= 230 && pix.B >= 145 && pix.B <= 175)
isAlien = true;
else if (pix.R >= 27 && pix.R <= 47 && pix.G <= 265 && pix.G >= 245 && pix.B >= 1 && pix.B <= 10)
isAlien = true;
else if (pix.R >= 240 && pix.R <= 255 && pix.G <= 240 && pix.G >= 255 && pix.B >= 25 && pix.B <= 45)
isAlien = true;
else if (pix.R >= 235 && pix.R <= 255 && pix.G <= 245 && pix.G >= 210 && pix.B >= 200 && pix.B <= 230)
isAlien = true;
else if (pix.R <= 240 && pix.R >= 210 && pix.G <=255 && pix.G >= 240 && pix.B >= 1 && pix.B <= 10)
isAlien = true;
if (!isAlien)
return 0;
// Store the location in the position vectors
xLocs.push_back(x);
yLocs.push_back(y);
// Make sure the pixel doesn't get counted again
setPixelColor(aPic,x,y,0,0,0);
int size = 0;
for (int i = 0; i <= 2; i++) {
for (int j = 0; j <= 2; j++) {
if (i == 0 && j == 0) {
break;
}
size += BlobSize(aPic,x + (i-1), y + (j-1),xLocs,yLocs);
}
}
return 1 + size;
}
コードを実行すると、数百の「エイリアン」が見つかったと表示されます。それが役立つ場合は、見つかったそれぞれが最後のものよりも大きくなっています。私はこれを何日も見つめてきましたが、何が問題なのかわかりません。どんな助けでも大歓迎です。
ありがとう!