(function(watermark){
window.watermarkdivs = [];
// 加载水印
var loadMark = function(settings) {
var defaultSettings={
watermark_txt:"text",
watermark_x:20,//水印起始位置x轴坐标
watermark_y:20,//水印起始位置Y轴坐标
watermark_rows:0,//水印行数
watermark_cols:0,//水印列数
watermark_x_space:50,//水印x轴间隔
watermark_y_space:50,//水印y轴间隔
watermark_color:‘#000000‘,//水印字体颜色
watermark_alpha:0.005,//水印透明度,小于等于0.003,不可恢复到水印。
watermark_fontsize:‘18px‘,//水印字体
watermark_font:‘微软雅黑‘,//水印字体
watermark_width:150,//水印宽度
watermark_height:100,//水印长度
watermark_angle:15,//水印倾斜度数
// watermark_bg_color:‘yellow‘,
watermark_bg_alpha:0.5 //加透明度导致隐形水印无法读取
};
//采用配置项替换默认值,作用类似jquery.extend
if(arguments.length===1&&typeof arguments[0] ==="object" )
{
var src=arguments[0]||{};
for(key in src)
{
if(src[key]&&defaultSettings[key]&&src[key]===defaultSettings[key])
continue;
else if(src[key])
defaultSettings[key]=src[key];
}
}
var oTemp = document.createDocumentFragment();
if (window.watermarkdivs && window.watermarkdivs.length > 0) {
document.body.removeChild(document.getElementById("otdivid"));
window.watermarkdivs = [];
}
//获取页面最大宽度
var page_width = Math.max(document.body.scrollWidth,document.body.clientWidth);
//获取页面最大长度
var page_height = Math.max(document.body.scrollHeight,document.body.clientHeight);
var otdiv = document.getElementById("otdivid");
//如果将水印列数设置为0,或水印列数设置过大,超过页面最大宽度,则重新计算水印列数和水印x轴间隔
if (defaultSettings.watermark_cols == 0 || (parseInt(defaultSettings.watermark_x + defaultSettings.watermark_width *defaultSettings.watermark_cols + defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1)) > page_width)) {
defaultSettings.watermark_cols = parseInt((page_width - defaultSettings.watermark_x + defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space));
defaultSettings.watermark_x_space = parseInt((page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / (defaultSettings.watermark_cols - 1));
}
//如果将水印行数设置为0,或水印行数设置过大,超过页面最大长度,则重新计算水印行数和水印y轴间隔
if (defaultSettings.watermark_rows == 0 || (parseInt(defaultSettings.watermark_y + defaultSettings.watermark_height * defaultSettings.watermark_rows + defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1)) > page_height)) {
defaultSettings.watermark_rows = parseInt((defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space));
defaultSettings.watermark_y_space = parseInt(((page_height - defaultSettings.watermark_y) - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1));
}
var x;
var y;
for (var i = 0; i < defaultSettings.watermark_rows; i++) {
y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
for (var j = 0; j < defaultSettings.watermark_cols; j++) {
x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;
var mask_div = document.createElement(‘div‘);
mask_div.id = ‘mask_div‘ + i + j;
mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt));
//设置水印div倾斜显示
mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
mask_div.style.visibility = "";
mask_div.style.position = "absolute";
//选不中
mask_div.style.left = x + ‘px‘;
mask_div.style.top = y + ‘px‘;
mask_div.style.overflow = "hidden";
mask_div.style.zIndex = "9";
mask_div.style.pointerEvents = "none";
//mask_div.style.border="solid #eee 1px";
mask_div.style.opacity = defaultSettings.watermark_alpha;
mask_div.style.fontSize = defaultSettings.watermark_fontsize;
mask_div.style.fontFamily = defaultSettings.watermark_font;
mask_div.style.color = defaultSettings.watermark_color;
mask_div.style.textAlign = "center";
mask_div.style.width = defaultSettings.watermark_width + ‘px‘;
mask_div.style.height = defaultSettings.watermark_height + ‘px‘;
mask_div.style.display = "block";
mask_div.style.fontWeight = "900";
oTemp.appendChild(mask_div);
};
};
document.body.appendChild(oTemp);
};
watermark.load = function(settings) {
window.onload = function() {
loadMark(settings);
};
window.onresize = function() {
loadMark(settings);
};
};
watermark.load({ watermark_txt: "测试水印,1021002301,测试水印,SDAHJDBJJdjsfsc" });
})(window.watermark = {});
View Code
<html>
<meta charset="utf-8">
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<script type="text/javascript" src="watermark.js"></script>
<!--<script type="text/javascript">-->
<!--watermark.load({ watermark_txt: "测试水印,1021002301,测试水印,SDAHJDBJJdjsfsc" });-->
<!--</script>-->
<body>
<div style="width:300px;height:300px;background-color: red; opacity:0.98;" onclick="alert(1);">test</div>
<div style="width:300px;height:300px;background-color: blue; opacity:0.9;" onclick="alert(2);">test</div>
<a href="www.test.com"> baidu</a>
</body>
</html>
View Code
clc;clear;close all;
alpha = 1;
%% read data
im = double(imread(‘G:\2017学习\000苏宁实习\Work\图片水印\test.jpg‘))/255;
mark = double(imread(‘G:\2017学习\000苏宁实习\Work\图片水印\watermark.png‘))/255;
figure, imshow(im),title(‘original image‘);
figure, imshow(mark),title(‘watermark‘);
%% encode mark
imsize = size(im);
%random
TH=zeros(imsize(1)*0.5,imsize(2),imsize(3));
TH1 = TH;
TH1(1:size(mark,1),1:size(mark,2),:) = mark;
M=randperm(0.5*imsize(1));
N=randperm(imsize(2));
save(‘G:\2017学习\000苏宁实习\Work\图片水印\encode.mat‘,‘M‘,‘N‘);
for i=1:imsize(1)*0.5
for j=1:imsize(2)
TH(i,j,:)=TH1(M(i),N(j),:);
end
end
% symmetric
mark_ = zeros(imsize(1),imsize(2),imsize(3));
mark_(1:imsize(1)*0.5,1:imsize(2),:)=TH;
for i=1:imsize(1)*0.5
for j=1:imsize(2)
mark_(imsize(1)+1-i,imsize(2)+1-j,:)=TH(i,j,:);
end
end
figure,imshow(mark_),title(‘encoded watermark‘);
%% add watermark
FA=fft2(im);
figure,imshow(FA);title(‘spectrum of original image‘);
FB=FA+alpha*double(mark_);
figure,imshow(FB); title(‘spectrum of watermarked image‘);
FAO=ifft2(FB);
figure,imshow(FAO); title(‘watermarked image‘);
%imwrite(uint8(FAO),‘watermarked image.jpg‘);
RI = FAO-double(im);
figure,imshow(uint8(RI)); title(‘residual‘);
%imwrite(uint8(RI),‘residual.jpg‘);
xl = 1:imsize(2);
yl = 1:imsize(1);
[xx,yy] = meshgrid(xl,yl);
figure, plot3(xx,yy,FA(:,:,1).^2+FA(:,:,2).^2+FA(:,:,3).^2),title(‘spectrum of original image‘);
figure, plot3(xx,yy,FB(:,:,1).^2+FB(:,:,2).^2+FB(:,:,3).^2),title(‘spectrum of watermarked image‘);
figure, plot3(xx,yy,FB(:,:,1).^2+FB(:,:,2).^2+FB(:,:,3).^2-FA(:,:,1).^2+FA(:,:,2).^2+FA(:,:,3).^2),title(‘spectrum of watermark‘);
%% extract watermark
FA2=fft2(FAO);
G=(FA2-FA)/alpha;
GG=G;
for i=1:imsize(1)*0.5
for j=1:imsize(2)
GG(M(i),N(j),:)=G(i,j,:);
end
end
for i=1:imsize(1)*0.5
for j=1:imsize(2)
GG(imsize(1)+1-i,imsize(2)+1-j,:)=GG(i,j,:);
end
end
figure,imshow(GG);title(‘extracted watermark‘);
%imwrite(uint8(GG),‘extracted watermark.jpg‘);
%% MSE and PSNR
C=double(im);
RC=double(FAO);
MSE=0; PSNR=0;
for i=1:imsize(1)
for j=1:imsize(2)
MSE=MSE+(C(i,j)-RC(i,j)).^2;
end
end
MSE=MSE/360.^2;
PSNR=20*log10(255/sqrt(MSE));
MSE
PSNR