109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
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// =====================================================================================
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//
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// Filename: integralimg.cc
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//
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// Description:
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//
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// Version: 1.0
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// Created: 09/20/2010 06:58:34 PM
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// Revision: none
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// Compiler: g++
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//
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// Author: Jan Elseberg (), jelseber@uos.de
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// Company: Universitaet Osnabrueck
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//
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// =====================================================================================
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//
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#include <iostream>
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using std::cout;
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using std::cerr;
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using std::endl;
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#ifndef __INTEGRALIMG_H__
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#define __INTEGRALIMG_H__
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#define TBB 5
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#define SBB 7
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#define HEIGHT 26
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//#define HEIGHT 40
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#define WIDTH 30
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const int black[4][2] = { {0,0}, {WIDTH+2*SBB,0}, {WIDTH+2*SBB,HEIGHT+TBB}, {0,HEIGHT+TBB}};
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const int white[4][2] = { {SBB,TBB}, {WIDTH+SBB,TBB}, {WIDTH+SBB,HEIGHT+TBB}, {SBB,HEIGHT+TBB}};
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/*const int black[4][2] = { {0,0}, {30+2*SBB,0}, {30+2*SBB,40+TBB}, {0,40+TBB}};
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const int white[4][2] = { {SBB,TBB}, {30+SBB,TBB}, {30+SBB,40+TBB}, {SBB,40+TBB}};
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*/
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class integral_img {
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public:
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integral_img(int **_img, int x, int y) {
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img = _img;
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X = x;
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Y = y;
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for (int i = 1; i < X; i++) {
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img[i][0] += img[i-1][0];
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}
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for (int j = 1; j < Y; j++) {
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img[0][j] += img[0][j-1];
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}
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for (int i = 1; i < X; i++) {
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for (int j = 1; j < Y; j++) {
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img[i][j] += img[i-1][j] + img[i][j-1] - img[i-1][j-1];
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}
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}
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}
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int At(int x, int y) {
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if (x < 0 || y < 0) {
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return 0;
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}
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if (x >= X) x = X - 1;
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if (y >= Y) y = Y - 1;
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return img[x][y];
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}
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double getBest(int &x, int&y) {
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int score;
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int maxscore = 0;
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int maxx = 0;
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int maxy = 0;
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for (int i = -SBB; i < X+SBB; i++) {
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for (int j = -TBB; j < Y+TBB; j++) {
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score = 2*getWhite(i,j) - getBlack(i,j);
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// cout << i << " " << j << ": W " << getWhite(i,j)<< " B " << getBlack(i,j) << " SCORE " << score << endl;
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if (score > maxscore) {
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maxscore = score;
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maxx = i;
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maxy = j;
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}
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}
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}
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x = maxx + SBB;
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y = maxy + TBB;
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return (double)maxscore/(double)(HEIGHT*WIDTH);
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}
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inline int getWhite(int x, int y) {
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return At(x + white[0][0], y + white[0][1]) + At(x + white[2][0], y + white[2][1]) -
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At(x + white[1][0], y + white[1][1]) - At(x + white[3][0], y + white[3][1]);
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}
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inline int getBlack(int x, int y) {
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return At(x + black[0][0], y + black[0][1]) + At(x + black[2][0], y + black[2][1]) -
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At(x + black[1][0], y + black[1][1]) - At(x + black[3][0], y + black[3][1]);
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}
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int **img;
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int X;
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int Y;
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};
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#endif
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