NodeJS实现图片文本分割 NodeJS实现图片文本分割

【NodeJS实现图片文本分割】本文实例为大家分享了NodeJS实现图片文本分割的具体代码，供大家参考，具体内容如下

文章图片

var fs = require('fs'); var jpeg = require('jpeg-js') function getSumRGB(data, i){ var cr = data.data[i+0] var cg = data.data[i+1] var cb = data.data[i+2] var srgb = (cr+cg+cb) return srgb} function getTopRGB(data, i){ var topIndex = (data.width * 4 * -1) i= i + topIndex; var cr = data.data[i+0] var cg = data.data[i+1] var cb = data.data[i+2] return [cr,cg,cb]} function getHeightRGB(data, i, haveRGB){ var width = data.width var height = data.height var len = width * height * 4 var haveNum = 0 for(i=i; i 120*3) {data.data[i+0]=255data.data[i+1]=255data.data[i+2]=255} } for(i=0; i0 ) {if(block == 0) {block = i}} } console.log(arrlist) return data} var picname = "tmp.jpg"var newpicname= "000.jpg"var jpegData = https://www.it610.com/article/fs.readFileSync(picname)var rawImageData = jpeg.decode(jpegData, {useTArray: true})rawImageData = ClearBackGround(rawImageData)var jpegImageData = jpeg.encode(rawImageData,100)fs.writeFileSync(newpicname, jpegImageData.data)

再为大家分享JS实现图片切割的方法：

//图片切割var ImgCropper = Class.create(); ImgCropper.prototype = {//容器对象,控制层,图片地址initialize: function(container, handle, url, options) {this._Container = $(container); //容器对象this._layHandle = $(handle); //控制层this.Url = url; //图片地址this._layBase = this._Container.appendChild(document.createElement("img")); //底层this._layCropper = this._Container.appendChild(document.createElement("img")); //切割层this._layCropper.onload = Bind(this, this.SetPos); //用来设置大小this._tempImg = document.createElement("img"); this._tempImg.onload = Bind(this, this.SetSize); this.SetOptions(options); this.Opacity = Math.round(this.options.Opacity); this.Color = this.options.Color; this.Scale = !!this.options.Scale; this.Ratio = Math.max(this.options.Ratio, 0); this.Width = Math.round(this.options.Width); this.Height = Math.round(this.options.Height); //设置预览对象var oPreview = $(this.options.Preview); //预览对象if(oPreview){oPreview.style.position = "relative"; oPreview.style.overflow = "hidden"; this.viewWidth = Math.round(this.options.viewWidth); this.viewHeight = Math.round(this.options.viewHeight); //预览图片对象this._view = oPreview.appendChild(document.createElement("img")); this._view.style.position = "absolute"; this._view.onload = Bind(this, this.SetPreview); }//设置拖放this._drag = new Drag(this._layHandle, { Limit: true, onMove: Bind(this, this.SetPos), Transparent: true }); //设置缩放this.Resize = !!this.options.Resize; if(this.Resize){var op = this.options, _resize = new Resize(this._layHandle, { Max: true, onResize: Bind(this, this.SetPos) }); //设置缩放触发对象op.RightDown && (_resize.Set(op.RightDown, "right-down")); op.LeftDown && (_resize.Set(op.LeftDown, "left-down")); op.RightUp && (_resize.Set(op.RightUp, "right-up")); op.LeftUp && (_resize.Set(op.LeftUp, "left-up")); op.Right && (_resize.Set(op.Right, "right")); op.Left && (_resize.Set(op.Left, "left")); op.Down && (_resize.Set(op.Down, "down")); op.Up && (_resize.Set(op.Up, "up")); //最小范围限制this.Min = !!this.options.Min; this.minWidth = Math.round(this.options.minWidth); this.minHeight = Math.round(this.options.minHeight); //设置缩放对象this._resize = _resize; }//设置样式this._Container.style.position = "relative"; this._Container.style.overflow = "hidden"; this._layHandle.style.zIndex = 200; this._layCropper.style.zIndex = 100; this._layBase.style.position = this._layCropper.style.position = "absolute"; this._layBase.style.top = this._layBase.style.left = this._layCropper.style.top = this._layCropper.style.left = 0; //对齐//初始化设置this.Init(); },//设置默认属性SetOptions: function(options) {this.options = {//默认值Opacity:50,//透明度(0到100)Color:"",//背景色Width:0,//图片高度Height:0,//图片高度//缩放触发对象Resize:false,//是否设置缩放Right:"",//右边缩放对象Left:"",//左边缩放对象Up:"",//上边缩放对象Down:"",//下边缩放对象RightDown:"",//右下缩放对象LeftDown:"",//左下缩放对象RightUp:"",//右上缩放对象LeftUp:"",//左上缩放对象Min:false,//是否最小宽高限制(为true时下面min参数有用)minWidth:50,//最小宽度minHeight:50,//最小高度Scale:false,//是否按比例缩放Ratio:0,//缩放比例(宽/高)//预览对象设置Preview:"",//预览对象viewWidth:0,//预览宽度viewHeight:0//预览高度}; Extend(this.options, options || {}); },//初始化对象Init: function() {//设置背景色this.Color && (this._Container.style.backgroundColor = this.Color); //设置图片this._tempImg.src = https://www.it610.com/article/this._layBase.src = this._layCropper.src = this.Url; //设置透明if(isIE){this._layBase.style.filter ="alpha(opacity:" + this.Opacity + ")"; } else {this._layBase.style.opacity = this.Opacity / 100; }//设置预览对象this._view && (this._view.src = https://www.it610.com/article/this.Url); //设置缩放if(this.Resize){with(this._resize){Scale = this.Scale; Ratio = this.Ratio; Min = this.Min; minWidth = this.minWidth; minHeight = this.minHeight; }}},//设置切割样式SetPos: function() {//ie6渲染bugif(isIE6){ with(this._layHandle.style){ zoom = .9; zoom = 1; }; }; //获取位置参数var p = this.GetPos(); //按拖放对象的参数进行切割this._layCropper.style.clip ="rect(" + p.Top + "px " + (p.Left + p.Width) + "px " + (p.Top + p.Height) + "px " + p.Left + "px)"; //设置预览this.SetPreview(); },//设置预览效果SetPreview: function() {if(this._view){//预览显示的宽和高var p = this.GetPos(), s = this.GetSize(p.Width, p.Height, this.viewWidth, this.viewHeight), scale = s.Height / p.Height; //按比例设置参数var pHeight = this._layBase.height * scale, pWidth = this._layBase.width * scale, pTop = p.Top * scale, pLeft = p.Left * scale; //设置预览对象with(this._view.style){//设置样式width = pWidth + "px"; height = pHeight + "px"; top = - pTop + "px "; left = - pLeft + "px"; //切割预览图clip = "rect(" + pTop + "px " + (pLeft + s.Width) + "px " + (pTop + s.Height) + "px " + pLeft + "px)"; }}},//设置图片大小SetSize: function() {var s = this.GetSize(this._tempImg.width, this._tempImg.height, this.Width, this.Height); //设置底图和切割图this._layBase.style.width = this._layCropper.style.width = s.Width + "px"; this._layBase.style.height = this._layCropper.style.height = s.Height + "px"; //设置拖放范围this._drag.mxRight = s.Width; this._drag.mxBottom = s.Height; //设置缩放范围if(this.Resize){ this._resize.mxRight = s.Width; this._resize.mxBottom = s.Height; }},//获取当前样式GetPos: function() {with(this._layHandle){return { Top: offsetTop, Left: offsetLeft, Width: offsetWidth, Height: offsetHeight }}},//获取尺寸GetSize: function(nowWidth, nowHeight, fixWidth, fixHeight) {var iWidth = nowWidth, iHeight = nowHeight, scale = iWidth / iHeight; //按比例设置if(fixHeight){ iWidth = (iHeight = fixHeight) * scale; }if(fixWidth && (!fixHeight || iWidth > fixWidth)){ iHeight = (iWidth = fixWidth) / scale; }//返回尺寸对象return { Width: iWidth, Height: iHeight }}}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。