本次采用的是RGB raw16 bit 模式，由于OV7620只引出了Y通道，所以配置为one line mode(这里出现了问题，明明RGB三个分量都有，但是通过插值后显示出来的尽然还是灰度图像，后面再分析原因)。下面贴出OV7620相关寄存器的配置：
unsigned char reg_12_w_reset[2]={0x12,0x80};//先清零
unsigned char reg_11_w[2]={0x11,0x00}; //配置PCLK速率 PCLK=(CLK_input/(CLK<5:0>+1)*2)),本次为1/2时钟频率
unsigned char reg_12_w[2]={0x12,0x2c}; //使能AGC，选择raw data outtput,并且使能自动白平衡
unsigned char reg_14_w[2]={0x14,0x24};//QVGA digital output format ,RGB gamma on
unsigned char reg_28_w[2]={0x28,0xa0}; //one-line RGB data format ,select Progressive sCAN mode
下面是Bayer转RGB24的算法(在液晶屏上显示时还要转为RGB16):
void bayer2rgb24(unsigned char *dst, unsigned char *SRC, long WIDTH, long HEIGHT)
{
long int i;
unsigned char *rawpt, *scanpt;
long int size;
rawpt = src;
scanpt = dst;
size = WIDTH*HEIGHT;
for ( i = 0; i < size; i++ )
{
if ( (i/WIDTH) % 2 == 0 ) //奇数行
{
if ( (i % 2) == 0 ) //奇数列
{
/* B */
if ( (i > WIDTH) && ((i % WIDTH) > 0) )
{
*scanpt++ = ((long int)*(rawpt-WIDTH-1)+(long int)*(rawpt-WIDTH+1)+
(long int)*(rawpt+WIDTH-1)+(long int)*(rawpt+WIDTH+1))/4; /* R */
*scanpt++ = ((long int)*(rawpt-1)+(long int)*(rawpt+1)+
(long int)*(rawpt+WIDTH)+(long int)*(rawpt-WIDTH))/4; /* G */
*scanpt++ = *rawpt; /* B */
}
else /* first line or left column */
{
*scanpt++ = *(rawpt+WIDTH+1); /* R */
*scanpt++ = ((long int)*(rawpt+1)+(long int)*(rawpt+WIDTH))/2; /* G */
*scanpt++ = *rawpt; /* B */
}
}
else
{
/* (B)G */
if ( (i > WIDTH) && ((i % WIDTH) < (WIDTH-1)) )
{
*scanpt++ = ((long int)*(rawpt+WIDTH)+(long int)*(rawpt-WIDTH))/2; /* R */
*scanpt++ = *rawpt; /* G */
*scanpt++ = ((long int)*(rawpt-1)+(long int)*(rawpt+1))/2; /* B */
}
else /* first line or right column */
{
*scanpt++ = *(rawpt+WIDTH); /* R */
*scanpt++ = *rawpt; /* G */
*scanpt++ = *(rawpt-1); /* B */
}
}
}
else //偶数行
{
if ( (i % 2) == 0 ) //奇数列
{
/* G(R) */
if ( (i < (WIDTH*(HEIGHT-1))) && ((i % WIDTH) > 0) )
{
*scanpt++ = ((long int)*(rawpt-1)+(long int)*(rawpt+1))/2; /* R */
*scanpt++ = *rawpt; /* G */
*scanpt++ = ((long int)*(rawpt+WIDTH)+(long int)*(rawpt-WIDTH))/2; /* B */
}
else
{
/* bottom line or left column */
*scanpt++ = *(rawpt+1); /* R */
*scanpt++ = *rawpt; /* G */
*scanpt++ = *(rawpt-WIDTH); /* B */
}
}
else
{
/* R */
if ( i < (WIDTH*(HEIGHT-1)) && ((i % WIDTH) < (WIDTH-1)) )
{
*scanpt++ = *rawpt; /* R */
*scanpt++ = ((long int)*(rawpt-1)+(long int)*(rawpt+1)+
(long int)*(rawpt-WIDTH)+(long int)*(rawpt+WIDTH))/4; /* G */
*scanpt++ = ((long int)*(rawpt-WIDTH-1)+(long int)*(rawpt-WIDTH+1)+
(long int)*(rawpt+WIDTH-1)+(long int)*(rawpt+WIDTH+1))/4; /* B */
} else {
/* bottom line or right column */
*scanpt++ = *rawpt; /* R */
*scanpt++ = ((long int)*(rawpt-1)+(long int)*(rawpt-WIDTH))/2; /* G */
*scanpt++ = *(rawpt-WIDTH-1); /* B */
}
}
}
rawpt++;
}
}
本文关键字：无线 源码-程序，单片机-工控设备 - 源码-程序
上一篇：红外接收(模拟串口接收)程序
