利用Matlab一鍵生成工地海報(bào)特效

第利用Matlab一鍵生成工地海報(bào)特效目錄1.使用效果2.圖片準(zhǔn)備和導(dǎo)入3.圖像傾斜4.扭曲置換5.正交疊底6.緣修整(摳圖)7.背景圖像替換8.完整代碼

1.使用效果

這篇的本質(zhì)還是扭曲置換，其實(shí)看過前面幾篇文章的應(yīng)該都能猜出是怎樣做到的，下面開始講解：

2.圖片準(zhǔn)備和導(dǎo)入

首先m文件所在文件夾內(nèi)應(yīng)該有如下兩張圖：

此外還需要一張近似方形的圖片也要一起放在文件夾中，之后通過以下代碼導(dǎo)入和初步處理圖片(選擇幕布部分和去色代碼，可左右滑動)：

bkgPic=imread('bkg.jpg');%背景圖

screenPic=bkgPic(190:555,(190:555)+160,:);%幕布區(qū)域圖片

grayscreenPic=rgb2gray(screenPic);%灰度化幕布區(qū)域圖片

screenRange=imread('screenRange.jpg');%幕布范圍圖(用來扣幕布邊緣細(xì)節(jié))

screenRange=rgb2gray(screenRange);

forePic=imread('2048.jpg');%要做成海報(bào)的圖片

3.圖像傾斜

我們可以看出幕布是有些傾斜的，我們?yōu)榱俗寛D片和幕布更加貼近，我們將圖片進(jìn)行傾斜處理并將其調(diào)整至與幕布區(qū)域相似的大?。?/p>

%前景圖片變形=============================================================

tform=affine2d([1-0.020;-0.0210;001]);

forePic=imwarp(forePic,tform);

exforePic=imresize(forePic,size(grayscreenPic)+26);

4.扭曲置換

這部分參考之前布料貼圖的部分呀：

%扭曲置換=================================================================

fori=1:size(grayscreenPic,1)

forj=1:size(grayscreenPic,2)

goffset=(double(grayscreenPic(i,j))-128)/10;

offsetLim1=floor(goffset)+13;

offsetLim2=ceil(goffset)+13;

sep1=goffset-floor(goffset);

sep2=ceil(goffset)-goffset;

c1=double(exforePic(i+offsetLim1,j+offsetLim1,:));

c2=double(exforePic(i+offsetLim2,j+offsetLim2,:));

ifsep1==0

c=double(exforePic(i+offsetLim1,j+offsetLim1,:));

else

c=c2.*sep1+c1.*sep2;

newforePic(i,j,:)=c;

end

5.正交疊底

%正交疊底=================================================================

newforePic=uint8((double(newforePic).*double(grayscreenPic))./220);

%imshow(newforePic)

%舊版本的用下面這段代碼

%newforePicR=double(newforePic(:,:,1)).*double(grayscreenPic)./220;

%newforePicG=double(newforePic(:,:,2)).*double(grayscreenPic)./220;

%newforePicB=double(newforePic(:,:,3)).*double(grayscreenPic)./220;

%newforePic(:,:,1)=newforePicR;

%newforePic(:,:,2)=newforePicG;

%newforePic(:,:,3)=newforePicB;

%newforePic=uint8(newforePic);

6.緣修整(摳圖)

上方正交疊底后，幕布外面還是灰色，而且幕布內(nèi)容部分超出幕布范圍，我們可以用幕布范圍圖修整幕布：

%邊緣修整=================================================================

screenPicR=screenPic(:,:,1);newforePicR=newforePic(:,:,1);

screenPicG=screenPic(:,:,2);newforePicG=newforePic(:,:,2);

screenPicB=screenPic(:,:,3);newforePicB=newforePic(:,:,3);

screenPicR(screenRange20)=newforePicR(screenRange

screenPicG(screenRange20)=newforePicG(screenRange

screenPicB(screenRange20)=newforePicB(screenRange

screenPic(:,:,1)=screenPicR;

screenPic(:,:,2)=screenPicG;

screenPic(:,:,3)=screenPicB;

screenPic=uint8(screenPic);

7.背景圖像替換

%將背景圖幕布區(qū)域換為新圖=================================================

bkgPic(190:555,(190:555)+160,:)=screenPic;

imshow(bkgPic)

8.完整代碼

functionconsPoster

bkgPic=imread('bkg.jpg');%背景圖

screenPic=bkgPic(190:555,(190:555)+160,:);%幕布區(qū)域圖片

grayscreenPic=rgb2gray(screenPic);%灰度化幕布區(qū)域圖片

screenRange=imread('screenRange.jpg');%幕布范圍圖(用來扣幕布邊緣細(xì)節(jié))

screenRange=rgb2gray(screenRange);

forePic=imread('2048.jpg');%要做成海報(bào)的圖片

%前景圖片變形=============================================================

tform=affine2d([1-0.020;-0.0210;001]);

forePic=imwarp(forePic,tform);

exforePic=imresize(forePic,size(grayscreenPic)+26);

%扭曲置換=================================================================

fori=1:size(grayscreenPic,1)

forj=1:size(grayscreenPic,2)

goffset=(double(grayscreenPic(i,j))-128)/10;

offsetLim1=floor(goffset)+13;

offsetLim2=ceil(goffset)+13;

sep1=goffset-floor(goffset);

sep2=ceil(goffset)-goffset;

c1=double(exforePic(i+offsetLim1,j+offsetLim1,:));

c2=double(exforePic(i+offsetLim2,j+offsetLim2,:));

ifsep1==0

c=double(exforePic(i+offsetLim1,j+offsetLim1,:));

else

c=c2.*sep1+c1.*sep2;

newforePic(i,j,:)=c;

%正交疊底=================================================================

newforePic=uint8((double(newforePic).*double(grayscreenPic))./220);

%imshow(newforePic)

%舊版本的用下面這段代碼

%newforePicR=double(newforePic(:,:,1)).*double(grayscreenPic)./220;

%newforePicG=double(newforePic(:,:,2)).*double(grayscreenPic)./220;

%newforePicB=double(newforePic(:,:,3)).*double(grayscreenPic)./220;

%newforePic(:,:,1)=newforePicR;

%newforePic(:,:,2)=newforePicG;

%newforePic(:,:,3)=newforePicB;

%newforePic=uint8(newforePic);

%邊緣修整=================================================================

screenPicR=screenPic(:,:,1);newforePicR=newforePic(:,:,1);

screenPicG=screenPic(:,:,2);newforePicG=newforePic(:,:,2);

screenPicB=screenPic(:,:,3);newforePicB=newforePic(:,:,3);

screenPicR(screenRange20)=newforePicR(screenRange

screenPicG(screenRange20)=newforePicG(screenRange

screenPicB(screenRange20)=newforePicB(screenRange

screenPic(:,:,1)=screenPicR;

screenPic(:,:,2)=screenPicG;

screenPic(:,:,3)=screenPicB;