1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
| #define _CRT_SECURE_NO_WARNINGS // for strncopy and fopen
#include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
//include leptonica headers
#include <allheaders.h>
//include tesseract headers
#include <baseapi.h>
using namespace std;
TCHAR CurDir[MAX_PATH];
tesseract::TessBaseAPI *api;
void init_tesseract_ocr();
PIX* tesseract_preprocess(PIX* pixs);
string tesseract_ocr(PIX* image);
PIX* ScreenShot(int left, int top, int sizex, int sizey);
int main()
{
GetCurrentDirectory(MAX_PATH, CurDir);
init_tesseract_ocr();
PIX* sc = ScreenShot(0, 0, 500, 30);
//PIX* pp = tesseract_preprocess(sc);
//string text = tesseract_ocr(pp);
//cout << text << endl;
system("pause");
return 0;
}
PIX* ScreenShot(int left, int top, int sizex, int sizey)
{
// get the device context of the screen
HDC hScreenDC = CreateDC("DISPLAY", NULL, NULL, NULL);
// and a device context to put it in
HDC hMemoryDC = CreateCompatibleDC(hScreenDC);
HBITMAP hBitmap;
hBitmap = CreateCompatibleBitmap(hScreenDC, sizex, sizey);
// get a new bitmap
SelectObject(hMemoryDC, hBitmap);
BitBlt(hMemoryDC, 0, 0, sizex, sizey, hScreenDC, left, top, SRCCOPY);
BITMAP bmpScreen;
GetObject(hBitmap, sizeof(BITMAP), &bmpScreen);
BITMAPFILEHEADER bmfHeader;
BITMAPINFOHEADER bi;
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = bmpScreen.bmWidth;
bi.biHeight = bmpScreen.bmHeight;
bi.biPlanes = 1;
bi.biBitCount = 32;
bi.biCompression = BI_RGB;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
DWORD dwBmpSize = ((bmpScreen.bmWidth * bi.biBitCount + 31) / 32) * 4 * bmpScreen.bmHeight;
HANDLE hDIB = GlobalAlloc(GHND, dwBmpSize);
char *lpbitmap = (char *)GlobalLock(hDIB);
GetDIBits(hScreenDC, hBitmap, 0,
(UINT)bmpScreen.bmHeight,
lpbitmap,
(BITMAPINFO *)&bi, DIB_RGB_COLORS);
// Add the size of the headers to the size of the bitmap to get the total file size
DWORD dwSizeofDIB = dwBmpSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
//Offset to where the actual bitmap bits start.
bmfHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER);
//Size of the file
bmfHeader.bfSize = dwSizeofDIB;
//bfType must always be BM for Bitmaps
bmfHeader.bfType = 0x4D42; //BM
////////////////////////////////////////////////////////////////////////////////////////////////////////////
/*HANDLE hFile = CreateFile("UI.bmp",
GENERIC_WRITE,
0,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL, NULL);
DWORD dwBytesWritten = 0;
WriteFile(hFile, (LPSTR)&bmfHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL);
WriteFile(hFile, (LPSTR)&bi, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL);
WriteFile(hFile, (LPSTR)lpbitmap, dwBmpSize, &dwBytesWritten, NULL);
//Close the handle for the file that was created
CloseHandle(hFile);*/
////////////////////////////////////////////////////////////////////////////////////////////////////////////
std::vector<unsigned char> buffer(sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwBmpSize);
std::copy(reinterpret_cast<unsigned char*>(&bmfHeader), reinterpret_cast<unsigned char*>(&bmfHeader) + sizeof(BITMAPFILEHEADER), buffer.begin());
std::copy(reinterpret_cast<unsigned char*>(&bi), reinterpret_cast<unsigned char*>(&bi) + sizeof(BITMAPINFOHEADER), buffer.begin() + sizeof(BITMAPFILEHEADER));
std::copy(lpbitmap, lpbitmap + dwBmpSize, buffer.begin() + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER));
PIX *mypix = pixReadMemBmp(&buffer[0], buffer.size());
if (mypix == NULL)
{
cout << "mypix is NULL" << endl;
}
else
{
pixWriteImpliedFormat("preprocess.bmp", mypix, 0, 0);
}
DeleteDC(hMemoryDC);
DeleteDC(hScreenDC);
DeleteObject(hBitmap);
GlobalUnlock(hDIB);
GlobalFree(hDIB);
/////////////////////////////////////
return mypix;
} |
