对于初学者要入门图像处理这一行，想必大家都遇到这样的问题：
1，单纯用C/C++语言进行图像处理，苦于各种图像读写保存的库的加载调用，或者说实在不想用MFC，不想用CImage等，但是又没有办法；
2，想用高级语言，比如C#/JAVA等，因为他们有强大的图像加载保存API，可以直接方便的调用，但是，算法处理还是C/C++为主，毕竟用C#/JAVA做图像处理项目的太少太少；
3，如果想要自己实现图像的读写/保存算法，没有一定的功底，几乎不太可能，严重阻碍了初学者学习的热情；
对于一个初学者，或者小白来说，要搞清楚这些东西，简直如同噩梦，针对这些问题，本文给出C语言实现的一个更适合初学者入门的基础图像处理框架：
①，BMP/JPG/PNG/TGA格式图像读写/保存代码；
②，点/线/圆/三角形/长方形/多边形等常用形状的绘制代码；
上述两点，均由C语言实现，不依赖任何第三方库，极大的方便了大家学习使用；
1，BMP/JPG/PNG/TGA格式图像读写
这部分代码来自于github上的开源代码：https://github.com/XiuSdk/stb
stb代码框架中包含了各种图像读写操作，所有代码基于C语言实现，不依赖任何第三方，这里，我进行了简单的封装，接口如下：
/************************************************************
*Function: f_SF_ImgBase_ImageLoad
*Description: Image loading
*Params: fileName-image file path,eg:"C:\\test.jpg".
* width-image width.
* height-image height.
* component-the bits per pixel.
* 1 grey
* 2 grey, alpha
* 3 red, green, blue
* 4 red, green, blue, alpha
*Return: image data.
************************************************************/
unsigned char* f_SF_ImgBase_ImageLoad(char* fileName, int* width, int* height, int* component);
/************************************************************
*Function: f_SF_ImgBase_ImageSave
*Description: Image loading
*Params: fileName-image file path,eg:"C:\\save.jpg".
* width-image width.
* height-image height.
* data-the result image data to save, with format BGRA32.
* format-image format,0-BMP,1-JPG,2-PNG,3-TGA
*Return: 0-OK.
************************************************************/
int f_SF_ImgBase_ImageSave(char const *fileName, int width, int height, const void* data, int format);简单的两个接口，调用也非常简单，这两个接口，图像buffer都是bgra32格式，调用如下：
char* srcPath = "Test\\test.jpg";
char* savePath = "Result\\res.jpg";
int width = 0, height = 0, stride = 0, component = 0, mWidth = 0, mHeight = 0, mStride = 0, mComponent = 0;
unsigned char* srcData = f_SF_ImgBase_ImageLoad(srcPath, &width, &height, &component);
stride = width * 4;
//srcData为bgra32数据
f_SF_ImgBase_ImageSave(savePath, width, height, srcData, 1);有了这两个接口，初学者再也不用接入什么MFC/CImage/LIBJPG/LIBPNG等复杂的东西了！
2，图像基础绘制
有了图像读写，我们在实际应用中，往往需要在图像中绘制一些标签，比如人脸检测的人脸框，绘制一个三角形，矩形，圆形，或者更复杂的绘制任意一个多边形等等，这些东西，以往我们都是使用opencv或者使用上层语言的GDI+绘制来实现的，但是，这里，本人用C语言实现了这些功能，一共350行代码，包含如下功能：
①绘制实心点和空心点
②绘制线段，允许设置线的宽度
③绘制三角形/矩形/多边形/圆形/椭圆，允许设置画笔宽度
④填充三角形/矩形/多边形/圆形/椭圆
功能接口以输入bgra32格式为主，接口如下：
/********************************************************************
*Function: ImgDrawPoints
*Description: Draw points using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* points-points array,eg:[x0,y0,x1,y1...].
* pointNum-number of points.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
* radius-size of point.
********************************************************************/
void ImgDrawPoints(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int points[], int pointNum, int r, int g, int b, int radius);
/********************************************************************
*Function: ImgDrawHollowPoints
*Description: Draw hollow points using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* points-points array,eg:[x0,y0,x1,y1...].
* pointNum-number of points.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
* penSize-size of pen color.
* radius-size of point.
********************************************************************/
void ImgDrawHollowPoints(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int points[], int pointNum, int r, int g, int b, int penSize, int radius);
/********************************************************************
*Function: ImgDrawLine
*Description: Draw line using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* x1-x position of start point.
* y1-y position of start point.
* x2-x position of end point.
* y2-y position of end point.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
* penSize-size of line.
********************************************************************/
void ImgDrawLine(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride,int x1, int y1, int x2, int y2, int r, int g, int b, int penSize);
//draw rectangle
/********************************************************************
*Function: ImgDrawRectangle
*Description: Draw rectangles using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* x-x position of start point.
* y-y position of start point.
* w-width of rectangle.
* h-height of rectangle.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
* penSize-size of lines.
********************************************************************/
void ImgDrawRectangle(unsigned char*srcData, int srcWidth, int srcHeight, int srcStride, int x, int y, int w, int h, int r, int g, int b, int penSize);
/********************************************************************
*Function: ImgDrawTriangle
*Description: Draw triangles using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* x-x position of frist point.
* y-y position of frist point.
* x1-x position of second point.
* y1-y position of second point.
* x2-x position of third point.
* y2-y position of third point.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
* penSize-size of lines.
********************************************************************/
void ImgDrawTriangle(unsigned char*srcData, int srcWidth, int srcHeight, int srcStride, int x, int y, int x1, int y1, int x2, int y2, int r, int g, int b, int penSize);
/********************************************************************
*Function: ImgDrawCircle
*Description: Draw circle using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* centerX-x position of center point.
* centerY-y position of center point.
* radius-radius of circle.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
* penSize-size of pen color.
********************************************************************/
void ImgDrawCircle(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int centerX, int centerY, int radius, int r, int g, int b, int penSize);
/********************************************************************
*Function: ImgDrawFillCircle
*Description: Fill circle using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* centerX-x position of center point.
* centerY-y position of center point.
* radius-radius of circle.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
********************************************************************/
void ImgDrawFillCircle(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int centerX, int centerY, int radius, int r, int g, int b);
/********************************************************************
*Function: ImgDrawFillTriangle
*Description: Fill triangles using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* x-x position of frist point.
* y-y position of frist point.
* w-width of rectangle.
* h-height of rectangle.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
********************************************************************/
void ImgDrawFillRectangle(unsigned char*srcData, int srcWidth, int srcHeight, int srcStride, int x, int y, int w, int h, int r, int g, int b);
/********************************************************************
*Function: ImgDrawFillTriangle
*Description: Fill triangles using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* x-x position of frist point.
* y-y position of frist point.
* x1-x position of second point.
* y1-y position of second point.
* x2-x position of third point.
* y2-y position of third point.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
********************************************************************/
void ImgDrawFillTriangle(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int x, int y, int x1, int y1, int x2, int y2, int r, int g, int b);
/********************************************************************
*Function: ImgDrawPolygon
*Description: Draw Polygon using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* polygonPoints-points array of polygon, eg:[x0, y0, x1, y1,...].
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
* penSize-size of pen color.
********************************************************************/
void ImgDrawPolygon(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int polygonPoints[], int pointNum, int r, int g, int b, int penSize);
/********************************************************************
*Function: ImgDrawFillPolygon
*Description: Fill Polygon using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* polygonPoints-points array of polygon, eg:[x0, y0, x1, y1,...].
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
********************************************************************/
void ImgDrawFillPolygon(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int polygonPoints[], int pointNum, int r, int g, int b);
/********************************************************************
*Function: ImgDrawEllipse
*Description: Draw Ellipse using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* centerX-center x of eclipse.
* centerY-center y of eclipse.
* A-A of eclipse(A > B).
* B-B of eclipse(B < A).
* penSize-size of pen color.
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
********************************************************************/
void ImgDrawEllipse(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int centerX, int centerY, int A, int B, int r, int g, int b, int penSize);
/********************************************************************
*Function: ImgDrawFillEclipse
*Description: Fill Ellipse using specified color.
*Params:
* srcData-source image with bgra32 pixelformat.
* srcWidth-width of source image.
* srcHeight-height of source image.
* srcStride-stride of source image.
* centerX-center x of eclipse.
* centerY-center y of eclipse.
* A-A of eclipse(A > B).
* B-B of eclipse(B < A).
* r-Red component of pen color.
* g-Green component of pen color.
* b-Blue component of pen color.
********************************************************************/
void ImgDrawFillEllipse(unsigned char* srcData, int srcWidth, int srcHeight, int srcStride, int centerX, int centerY, int A, int B, int r, int g, int b);调用举例如下：
//Drawing Rectangle
int x = 100, y = 100, w = 50, h = 50;
ImgDrawRectangle(srcData, width, height, stride, x, y, w, h, penColorR, penColorG, penColorB, 3);
//Drawing Triangle
ImgDrawTriangle(srcData, width, height, stride, x, y, x + 100, y, x, y + 100, penColorG, penColorR, penColorB, 1);
//fill rectangle
ImgDrawFillRectangle(srcData, width, height, stride, 100, 300, w, h, penColorR, penColorG, penColorB);
//fill triangle
ImgDrawFillTriangle(srcData, width, height, stride, x, y + 100, x + 100, y + 100, x, y + 200, penColorG, penColorR, penColorB);
int polyPoints[8] = {200, 200, 250, 130, 280, 220, 230, 300};
//draw polygon
ImgDrawPolygon(srcData, width, height, stride, polyPoints, 4, 200, 100, 50, 2);
int polyPoints1[8] = {300, 400, 350, 130, 480, 220, 330, 400};
//fill polygon
ImgDrawFillPolygon(srcData, width, height, stride, polyPoints1, 4, 200, 100, 250);
//fill ellipse
ImgDrawFillEllipse(srcData, width, height, stride, 500, 500, 100, 50, 155, 245,67);
//draw ellipse
ImgDrawEllipse(srcData, width, height, stride, 200, 500, 100, 50, 255, 45,67, 1);对应效果图如下：
整体算法编译DLL不足100K，可谓轻量级的库。
在使用时，只需要把库ImageProcessBasicFramework.dll和ImageProcessBasicFramework.lib以及头文件ImgBasic文件夹放到工程路径下，点击工程属性，配置link-input与VC++目录即可，如下所示：
最后，给出代码库及DEMO下载链接：https://download.csdn.net/download/trent1985/11218979
代码库为VS2010 编译，DEMO为VS2010工程。
