Image1->Picture->Bitmap->SaveToStream(stream1);
    BYTE* pbData=NULL;        stream1->Position=0;
    pbData=(BYTE*)stream1->Memory;         int gray;
    int r,g,b;
    for(int i=54;iSize;i=i 3)
    {
        b=pbData[i];
        g=pbData[i 1];
        r=pbData[i 2];            gray=0.299*r  0.587*g 0.114*b;
        pbData[i]=(Byte)gray;
        pbData[i 1]=(Byte)gray;
        pbData[i 1]=(Byte)gray;
    }
    Image1->Picture->Bitmap->LoadFromStream(stream1);

        pbData[i]=(Byte)gray;
        pbData[i 1]=(Byte)gray;
        pbData[i 1]=(Byte)gray;
改成
        pbData[i]=(Byte)gray;
        pbData[i 1]=(Byte)gray;
        pbData[i 2]=(Byte)gray;