[영상처리] histogram 처리

문제 grayscale 영상 Y를 얻은 후에, histogram을 다음과 같이 출력하시오

gl frequency// gl = graylevel, frequency = 빈도수
0       0
1       0
...
255     0
전체 픽셀 개수 = 262144

1. 코드

int hist[256] = { 0, };
	
	for (i = 0; i < m_Height; i++)
	{
		for (j = 0; j < m_Width; j++)
		{
			unsigned char tempt = *(YBuf + i * m_Width + j);
			hist[tempt]++;
		}
	}

	int sum = 0;
	for (i = 0; i < 256; i++) {
		std::cout << i << "\t" << hist[i] << std::endl;
		sum += hist[i];
	}
	std::cout << "전체 픽셀 개수 = " << sum << std::endl;

2. 결과

Image Size = 512 512
 Making grayscale image
0       0
1       0
2       0
3       0
4       0
5       0
6       0
7       0
8       0
9       0
10      0
11      0
12      0
13      0
14      0
15      0
16      0
17      0
18      0
19      0
20      0
21      0
22      0
23      0
24      0
25      0
26      0
27      0
28      0
29      0
30      0
31      0
32      0
33      0
34      0
35      1
36      0
37      5
38      10
39      23
40      37
41      65
42      84
43      127
44      181
45      241
46      304
47      398
48      520
49      633
50      822
51      951
52      1160
53      1373
54      1656
55      1784
56      1936
57      2120
58      2193
59      2241
60      2270
61      2245
62      2128
63      2104
64      1969
65      1890
66      1692
67      1586
68      1451
69      1378
70      1271
71      1122
72      1074
73      990
74      979
75      950
76      916
77      872
78      859
79      864
80      821
81      922
82      946
83      1004
84      944
85      970
86      983
87      989
88      1036
89      990
90      968
91      971
92      1076
93      1080
94      1124
95      1080
96      1218
97      1270
98      1266
99      1396
100     1484
101     1633
102     1763
103     1941
104     2058
105     2135
106     2195
107     2101
108     2010
109     1988
110     1938
111     1871
112     1699
113     1539
114     1517
115     1576
116     1456
117     1611
118     1538
119     1519
120     1566
121     1625
122     1620
123     1731
124     1744
125     1877
126     2034
127     2091
128     2381
129     2459
130     2418
131     2530
132     2681
133     2528
134     2560
135     2334
136     2313
137     2226
138     2283
139     2227
140     2410
141     2548
142     2618
143     2745
144     2814
145     2797
146     2816
147     2681
148     2750
149     2734
150     2880
151     2947
152     2941
153     3093
154     3152
155     3045
156     2877
157     2803
158     2561
159     2376
160     2272
161     2199
162     1930
163     1675
164     1580
165     1468
166     1483
167     1482
168     1471
169     1433
170     1465
171     1384
172     1362
173     1307
174     1205
175     1013
176     987
177     882
178     826
179     858
180     790
181     742
182     826
183     864
184     825
185     845
186     767
187     799
188     785
189     768
190     836
191     869
192     875
193     889
194     919
195     1025
196     1024
197     1078
198     1154
199     1234
200     1289
201     1191
202     1166
203     1095
204     1021
205     994
206     874
207     807
208     689
209     627
210     557
211     526
212     396
213     323
214     278
215     206
216     174
217     171
218     147
219     104
220     95
221     66
222     65
223     51
224     35
225     32
226     14
227     7
228     15
229     3
230     8
231     1
232     0
233     1
234     1
235     0
236     0
237     1
238     0
239     0
240     1
241     0
242     0
243     0
244     0
245     0
246     0
247     0
248     0
249     0
250     0
251     0
252     0
253     0
254     0
255     0
전체 픽셀 개수 = 262144
 Saving Output  into Grayscale Image
_xx Filename = output.bmp
 END​