图像处理——alpha融合

对任意两张图像可以合成为一张图像，合成图像的像素取值根据数学公式：

RGB3 = (1- a) *RGB1 + a * RGB2

其中a为混合透明度取值范围[0,1]之间, RGB3为目标像素值, RGB1与RGB2的值分别来自两张不同的图像。

always@(posedge OutLvdsClk)

begin

rLvdsMulti <= OutOsdDe ?8'h80- OutOsdData[31:24]:8'h80;

rOsdMulti <= OutOsdDe ? OutOsdData[31:24] :8'h00;

end

always@(posedge OutLvdsClk)begin

ResultLvdsData_R <= MultLvdsData_R + MultOsdData_R;

ResultLvdsData_G <= MultLvdsData_G + MultOsdData_G;

ResultLvdsData_B <= MultLvdsData_B + MultOsdData_B;

end

assign RealLvdsClk = OutLvdsClk ;

always@(posedge OutLvdsClk)

begin

RealLvdsVs <= rLvdsVs[2];

RealLvdsHs <= rLvdsHs[2];

RealLvdsDe <= rLvdsDe[2];

RealLvdsData[23:16]<= ResultLvdsData_R[15]?8'hFF: ResultLvdsData_R[14:7];

RealLvdsData[15:8]<= ResultLvdsData_G[15]?8'hFF: ResultLvdsData_G[14:7];

RealLvdsData[7:0]<= ResultLvdsData_B[15]?8'hFF: ResultLvdsData_B[14:7];

end