判断图像中有多少行文本（开发中）

Posted 2022-02-14 caoke

const fs = require("fs")
const getPixels = require("get-pixels")
function getColor(x,y,pixels) 
    return [
        pixels.data[x*4+y*4*pixels.shape[0]],
        pixels.data[x*4+1+y*4*pixels.shape[0]],
        pixels.data[x*4+2+y*4*pixels.shape[0]],
        pixels.data[x*4+3+y*4*pixels.shape[0]]
    ]

function isNearColor(color1,color2)
    if((Math.abs(color1[0]-color2[0])+Math.abs(color1[1]-color2[1])+Math.abs(color1[2]-color2[2])+Math.abs(color1[3]-color2[3]))<40)
        return 1;
    
    return 0;

getPixels("1.jpg", function(err, pixels) 
    if(err) 
        console.log("Bad image path")
        return
    
    scanLine(pixels.shape[0],pixels.shape[1],function (curp,prep) 
        return isNearColor(getColor(curp.x,curp.y,pixels),getColor(prep.x,prep.y,pixels))
    ,function (),pixels)

)


//行扫描函数 line
function scanLine(w,h,isOpenFunc,callfunc,pixels) 
    const map=
    function isOpen(curp,prep) 
            const x,y=curp;
        if(map[x+‘,‘+y])
            return 0
        
        if(x<0||x>=w||y<0||y>=h)
            return 0;
        
        return isOpenFunc(curp,prep)
    
    function callback(x,y) 
        map[x+‘,‘+y]=true;
        return callfunc(x,y)
    
    let xline=[];
    let yline=[];
    function isXLine(x,y)
        return  y===0||xline.indexOf(`$x,$y`)>-1
    
    function isYLine(x,y)
        return  x===w-1||yline.indexOf(`$x,$y`)>-1
    

    for(let i=0;i<h;i++)
        yline.push(`0,$i`);
    
    let index=0;
    const posArr=[]
    let state=‘end‘;
    while(index<yline.length)

        //发出x射线
        let [x,y]=yline[index].split(‘,‘);
        x=parseInt(x);
        y=parseInt(y);
        //state

        const arr=[];
        while(isOpen(x:x+1,y,x,y))
            x=x+1;
            arr.push(x,y)
        

        if(x+1==w)
            if(state!==‘end‘)
                console.log(yline[index])
            
            state=‘end‘
        else
            if(state!==‘break‘)
                console.log(yline[index])
            
            state=‘break‘
        

        index++;
    


// scanRound(0,0,100,100,function (x,y) 
//     return 1;
// ,function (x,y) 
//     console.log(x,y);
// )

 

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