reaadBMP，读取24位BMP文件

Signed-off-by: mirgo <[email protected]>

testReadBMP.sln

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+
+Microsoft Visual Studio Solution File, Format Version 10.00
+# Visual Studio 2008
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testReadBMP", "testReadBMP\testReadBMP.vcproj", "{F5ED7E90-5C22-4D19-8500-EB44821F3BA4}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Release|Win32 = Release|Win32
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F5ED7E90-5C22-4D19-8500-EB44821F3BA4}.Debug|Win32.ActiveCfg = Debug|Win32
+		{F5ED7E90-5C22-4D19-8500-EB44821F3BA4}.Debug|Win32.Build.0 = Debug|Win32
+		{F5ED7E90-5C22-4D19-8500-EB44821F3BA4}.Release|Win32.ActiveCfg = Release|Win32
+		{F5ED7E90-5C22-4D19-8500-EB44821F3BA4}.Release|Win32.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

testReadBMP/Debug/mt.dep

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+�嵥��Դ�ϴθ���ʱ��Ϊ 14:16:27.54������λ��Ϊ 2014/02/08 ���� 

testReadBMP/Debug/testReadBMP.exe.embed.manifest

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level="asInvoker" uiAccess="false"></requestedExecutionLevel>
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+  <dependency>
+    <dependentAssembly>
+      <assemblyIdentity type="win32" name="Microsoft.VC90.DebugCRT" version="9.0.21022.8" processorArchitecture="x86" publicKeyToken="1fc8b3b9a1e18e3b"></assemblyIdentity>
+    </dependentAssembly>
+  </dependency>
+</assembly>

testReadBMP/Debug/testReadBMP.exe.intermediate.manifest

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+<?xml version='1.0' encoding='UTF-8' standalone='yes'?>
+<assembly xmlns='urn:schemas-microsoft-com:asm.v1' manifestVersion='1.0'>
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level='asInvoker' uiAccess='false' />
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+  <dependency>
+    <dependentAssembly>
+      <assemblyIdentity type='win32' name='Microsoft.VC90.DebugCRT' version='9.0.21022.8' processorArchitecture='x86' publicKeyToken='1fc8b3b9a1e18e3b' />
+    </dependentAssembly>
+  </dependency>
+</assembly>

testReadBMP/main.c

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+#include "stdio.h"
+#include "stdlib.h"
+
+#define  OFFSET 54L		//定义头偏移量
+
+#pragma pack(2)
+
+/*定义UCHAR为一个字节的类型*/
+typedef unsigned char UCHAR;
+/*定义WORD为两个字节的类型*/
+typedef unsigned short WORD;
+/*定义DWORD为e四个字节的类型*/
+typedef unsigned long DWORD;
+
+/*位图文件头*/
+typedef struct BMP_FILE_HEADER
+{
+	WORD bType;             /*  文件标识符          */
+	DWORD bSize;            /*  文件的大小          */
+	WORD bReserved1;        /*  保留值,必须设置为0  */       
+	WORD bReserved2;        /*  保留值,必须设置为0  */
+	DWORD bOffset;          /*  文件头的最后到图像数据位开始的偏移量    */
+} BMPFILEHEADER;
+
+/*位图信息头*/
+typedef struct BMP_INFO
+{
+	DWORD bInfoSize;       /*  信息头的大小             */
+	DWORD bWidth;          /*  图像的宽度               */
+	DWORD bHeight;         /*  图像的高度               */
+	WORD bPlanes;          /*  图像的位面数             */
+	WORD bBitCount;        /*  每个像素的位数           */
+	DWORD bCompression;    /*  压缩类型                 */
+	DWORD bmpImageSize;    /*  图像的大小,以字节为单位  */
+	DWORD bXPelsPerMeter;  /*  水平分辨率               */
+	DWORD bYPelsPerMeter;  /*  垂直分辨率               */
+	DWORD bClrUsed;        /*  使用的色彩数             */
+	DWORD bClrImportant;   /*  重要的颜色数             */
+} BMPINF;
+
+/*彩色表*/
+typedef struct RGB_QUAD 
+{
+	WORD rgbBlue;         /*  蓝色强度  */
+	WORD rgbGreen;        /*  绿色强度  */
+	WORD rgbRed;          /*  红色强度  */
+	WORD rgbReversed;     /*  保留值    */
+} RGBQUAD;
+
+//定义一个字节类型为UCHAR
+typedef unsigned char UCHAR;
+
+int readBmp(UCHAR **image, int height, int width, char *filename);
+void displayImg(UCHAR **image, int height, int width);
+int saveImg(UCHAR **image, int height, int width, char *filename);
+void test(UCHAR *image);
+UCHAR BGR2GRAY(UCHAR a, UCHAR b, UCHAR c);
+
+//主函数
+int main()
+{
+	//基本变量定义
+	char *filename = "C:\\Users\\Mirgo\\Desktop\\ac.bmp";
+	char *outfname = "C:\\Users\\Mirgo\\Desktop\\a.txt";
+	int height = 64;
+	int width = 64;
+	int i = 0;
+
+	//给二维数组动态分配空间
+	UCHAR **img;
+	img = (UCHAR **)malloc( (unsigned)(height * sizeof(UCHAR *) ) );
+	for (; i<width; i++)
+	{
+		img[i] = (UCHAR *)malloc( (unsigned)(width * sizeof(UCHAR)));
+	}
+
+	if (img == NULL)
+	{
+		printf("alloc memory failed!");
+		exit(0);
+	}
+	//UCHAR img[128220] = {0};
+
+	readBmp(img,height,width,filename);
+	saveImg(img,height,width,outfname);
+	displayImg(img,height,width);
+	//test(img);
+
+	system("pause");
+
+	free(img);		//无论几维数组都是这样释放的
+
+	return 0;
+}
+
+//读取图像
+int readBmp(UCHAR **image, int height, int width, char *filename)
+{
+	FILE *fp;
+	UCHAR *temp;
+	UCHAR c, cl[3];
+	BMPFILEHEADER fileHeader;
+	BMPINF infoHeader;
+	long offset, bmpImageSize, mwidth, mheight, bytesPerPixel, size, bitCount;
+	//char m_fname[128];
+	int i = 0;
+	int count = 0, l = 0,r = 0,en = 0;
+	//WORD c;
+
+	temp = (UCHAR*)malloc(sizeof(UCHAR)*height*width*3);
+	//sprintf(m_fname, "%s", filename);
+
+	if ((fp = fopen(filename,"rb")) == NULL)
+	{
+		//出错处理
+		printf("Cann't Open the BMP File!\nPlease Check the Filename!\n");
+		exit(0);
+	}
+
+	fseek(fp, 0, 0);
+	fread(&fileHeader, sizeof(fileHeader), 1, fp);
+	fread(&infoHeader, sizeof(infoHeader), 1, fp);
+
+	//计算并输出位图数据的偏移量，图像的大小，宽度和高度，每个像素点所占的字节
+	size = fileHeader.bSize;
+	offset = fileHeader.bOffset;
+	bmpImageSize = infoHeader.bmpImageSize;
+	mwidth = infoHeader.bWidth;
+	mheight = infoHeader.bHeight;
+	bitCount = infoHeader.bBitCount;
+	bytesPerPixel = infoHeader.bBitCount / 8;
+
+	printf("%c %d %d %d %d %d %d %d\n",fileHeader.bType, size, offset, bmpImageSize, mwidth, mheight, bitCount, bytesPerPixel);
+	printf("%d %d\n",sizeof(fileHeader),sizeof(infoHeader));
+
+	//偏移以跳过文件头
+	//fseek(fp, OFFSET, 0);
+	/*fread(&temp, sizeof(UCHAR), height*width*3, fp);
+	fclose(fp);
+
+	for (i = 0; i<height*width*3; i = i+3)
+	{
+		 c = (UCHAR)((temp[i]*30 + temp[i+1]*59 + temp[i+2]*11 + 50)/100);
+		 image[i/3] = (c>0?1:0) + 48;
+	}
+	image[height*width] = '\0';*/
+
+	//fseek(fp, -54L, 1);
+
+	//输出每个像素点所占字节中的内容
+	c = fgetc(fp);
+	while (!feof(fp))
+	{
+		//printf("%x", c==0xff?1:c);
+		c = fgetc(fp);
+		cl[l++] = c;
+		if (l == 3)
+		{
+			temp[count] = BGR2GRAY(cl[0],cl[1],cl[2]);
+			l = 0;
+			count++;
+		}
+
+		if (count % 64 == 0)
+		{
+			//printf("\n");
+		}
+
+		r++;
+	}
+
+	printf("\n%d %d\n",count,r);
+
+
+	count = 0;
+	for (i = height-1; i>=0; i--)
+	{
+		for (l = 0; l<width; l++)
+		{
+			image[i][l] = temp[count];
+			count++;
+		}
+	}
+
+
+
+	fclose(fp);
+
+	system("pause");
+
+	return 0;
+}
+
+//显示图像
+void displayImg(UCHAR **image, int height, int width)
+{
+	int i,j;
+
+	for (i = 0; i<height; i++)
+	{
+		for (j = 0; j<width; j++)
+		{
+			if (image[i][j] == 0)
+			{
+				printf("%c",0);
+			}
+			else
+			{
+				printf("%c",2);
+			}
+		}
+		printf("\n");
+	}
+}
+
+//保存图像到TXT文件
+int saveImg(UCHAR **image, int height, int width, char *filename)
+{
+	FILE *fp = NULL;
+	int i, j, k = 0;
+	//UCHAR c;
+
+	fp = fopen(filename,"w");
+
+	//fwrite(image, sizeof(UCHAR), 64*64, fp);
+
+	for (i = 0; i<height; i++)
+	{
+		for (j = 0; j<width; j++)
+		{
+			//输出到文件
+
+			(image[i][j] == 0)?fputc(0, fp):fputc(2, fp);
+			k++;
+		}
+		//一行完成，换行
+		fputc('\n',fp);
+	}
+
+	printf("调用saveImg()保存完成，像素点：%d个\n",k);
+
+	fclose(fp);
+
+	system("pause");
+
+	return 0;
+}
+
+//测试用
+void test(UCHAR *image)
+{
+	UCHAR *p = image;
+	int c = 0;
+
+	while (*p != '\0')
+	{
+		printf("%d", *p>0?1:0);
+		p++;
+		c++;
+		if (c == 64)
+		{
+			printf("\n");
+			c = 0;
+		}
+	}
+}
+
+UCHAR BGR2GRAY(UCHAR a, UCHAR b, UCHAR c)
+{
+	return (UCHAR)((a*11 + b*59 + c*30 + 50)/100);
+}