滑鼠侦测图片中 RGB及YUV值

//--------------------------------------------------------------------------- #include <vcl.h> #pragma hdrstop #include "Unit1.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { } //--------------------------------------------------------------------------- void __fastcall TForm1::openPicClick(TObject *Sender) { if (OpenPictureDialog1->Execute()) { Image1->AutoSize=true; Image1->Picture->LoadFromFile(OpenPictureDialog1->FileName); } } //--------------------------------------------------------------------------- void __fastcall TForm1::Image1MouseMove(TObject *Sender, TShiftState Shift, int X, int Y) { TColor a = Image1->Canvas->Pixels[X][Y]; unsigned char R,G,B; int y,u,v; //unsigned char b; R = char(a); Label7->Caption = int(R); a >>= 8; G = char(a); Label8->Caption = int(G); a >>= 8; B = char(a); Label9->Caption = int(B); y=0.299*R + 0.587*G + 0.114*B; u=(R-y)*0.713 + 128; v=(B-y)*0.564 + 128; Label10->Caption = int(y); Label11->Caption = int(u); Label12->Caption = int(v); Label14->Caption = X; Label16->Caption = Y; } //---------------------------------------------------------------------------