compare bitmaps

[scheisskopf]

i am trying to see whether one bitmap exists inside another (which is a screen print). i am trying to use memcmp:

int main() {
 
   HANDLE hBitMap = LoadImage(0, "img.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
 
    BITMAP bitmap;
    GetObject(hBitMap,sizeof(BITMAP),&bitmap);
    int size = bitmap.bmHeight*bitmap.bmWidth*bitmap.bmBitsPixel/8;
 
    BYTE *lpBits = new BYTE[ size ];
 
    GetBitmapBits((HBITMAP)hBitMap,size,lpBits );
 
   HANDLE hBitMap2 = LoadImage(0, "img2.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
 
    BITMAP bitmap2;
    GetObject(hBitMap2,sizeof(BITMAP),&bitmap2);
    int size2 = bitmap2.bmHeight*bitmap2.bmWidth*bitmap2.bmBitsPix  el/8;
 
    BYTE *lpBits2 = new BYTE[ size2 ];
 
    GetBitmapBits((HBITMAP)hBitMap2,size2,lpBits2 );
 
    int ScreenWidth = bitmap2.bmWidth;
    int ScreenHeight = bitmap2.bmHeight;
    int numOfCard = 1;
    int cardHeight = bitmap.bmHeight;
    int card_line_length = bitmap.bmWidth;
 
 
    for( int i = 0 ; i < ScreenWidth; i++ ) {
         for( int j = 0 ; j < ScreenHeight; j++ ) {
              for ( int k= 0; k < numOfCard; k++ ) {
                  int tmpY = j;
                  for ( int x = 0; x < cardHeight; x++ ) {
                      if ( memcmp(lpBits2[i][tmpY],lpBits[x],  card_line_length ) != 0 )
                           break; // we didnt find macth of a line
                      tmpY++; // move to next line
                  }
                  if ( x == cardHeight) {
                      cout << "found";     
                  }
              }
         }
    }
 
    system("PAUSE");
    return 0;
}

this is throwing the error at the moment:
invalid types `unsigned char[int]' for array subscript

which corresponds to this line:
memcmp(lpBits2[i][tmpY],lpBits[x], card_line_length )

i don't know what is going on!

[alibest]

i have a problems to make a coding to compare 2 images. i am a new person in this subject. so i need help from u to give me the coding. help me

[JosAH]

i have a problems to make a coding to compare 2 images. i am a new person in this subject. so i need help from u to give me the coding. help me

Please don't hijack this thread. If you want to ask a similar question, better
read the responses posted in this thread or if you really must, start your own
thread but don't just plunge in here.

kind regards,

Jos

[JosAH]

BYTE *lpBits2 = new BYTE[ size2 ];
...

this is throwing the error at the moment:
invalid types `unsigned char[int]' for array subscript

which corresponds to this line:
memcmp(lpBits2[i][tmpY],lpBits[x], card_line_length )

i don't know what is going on!

the memcmp() function expects two addresses and a length for its parameters.
Have a look at the first parameter: lpBits2 is a pointer to BYTE(s) which is an
address by itself, but lpBits2[i] is a BYTE and lpBits2[i][tmpY] is simply not
a valid indexed expression and most certainly doesn't resolve to an address.

kind regards,

Jos