无线图像传输系统ARM9+Atmega16+OV7620+

gressive 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++;

}

}