int TransformImageBuffer(unsigned char* pImageBuffer, int width, int height,unsigned char* targetImageBuffer)

{

        //center flip

    int nRet = ;

    int length = width * height;

    for(int i = ; i < length / ; i++)

    {

        targetImageBuffer[i] = pImageBuffer[length -i -];

        targetImageBuffer[length -i -] = pImageBuffer[i];

    }

    //vertical flip

    for(int h = ; h < height; h++)

    {

        int firstLine = h * width;

        for(int w = ; w < width /; w++)

        {

            int temp = targetImageBuffer[firstLine + w];

            targetImageBuffer[firstLine + w] = targetImageBuffer[firstLine + width - w - ];

            targetImageBuffer[firstLine + width - w - ] = temp;

        }

    }

    //horizon flip

    for(int i = ; i < length /; i++)

    {

        int line = i / width;

        int seq = i % width;

        int mirrorPoint = (height - line - ) * width -  + seq;

        targetImageBuffer[i] = pImageBuffer[mirrorPoint];

        targetImageBuffer[mirrorPoint] = pImageBuffer[i];

    }

    return nRet;

}