判断图像中有多少行文本（开发中）

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]))<50){
        return 1;
    }
    return 0;
}
function isNearLine(line1,line2){
    // if(Math.abs(line1[1].x-line2[1].x)<250){
    //     return 1;
    // }
    if(Math.abs(line1[1].y-line2[1].y)<380){
        return 1;
    }
    return 0;
}
function getPixelsSync(filename){
    return new Promise(function (resolve,reject) {
        getPixels(filename, function(err, pixels) {
            if(err) {
                console.log("Bad image path")
                reject(err)
                return
            }
            resolve(pixels)
        })
    })

}

async function init() {
    const pixels=await getPixelsSync('1.jpeg');
    console.log(pixels)
    const [w,h]=pixels.shape;

    let lineCache=[];
    let preLine=null;
    //x射线
    for (let y=0;y<h;y++){
        let preColor=null;
        const line=[]
        for (let x=0;x<w;x++){
            const curColor=getColor(x,y,pixels)
            if(!preColor){
                line[0]={x,y}
            }else{
                line[1]={x,y};
                if(!isNearColor(preColor,curColor)){
                    break;
                }
            }
            preColor=curColor;
        }
        if(preLine){
            if(!isNearLine(preLine,line)){
                if(preLine[1].x<line[1].x){
                    lineCache.push(line);
                }else{
                    lineCache.push(preLine);
                }

            }
        }
        preLine=line;
    }
    preLine=null;
    //x射线
    for (let x=0;x<w;x++){
        let preColor=null;
        const line=[]
        for (let y=0;y<h;y++){
            const curColor=getColor(x,y,pixels)
            if(!preColor){
                line[0]={x,y}
            }else{
                line[1]={x,y};
                if(!isNearColor(preColor,curColor)){
                    break;
                }
            }
            preColor=curColor;
        }
        if(preLine){
            if(!isNearLine(preLine,line)){
                if(preLine[1].y<line[1].y){
                    lineCache.push(line);
                }else{
                    lineCache.push(preLine);
                }

            }
        }
        preLine=line;
    }

    console.log(lineCache)
    // 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)
}
init()

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

https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1561552141135&di=170679fcee4e69499f94b5167c8e474a&imgtype=0&src=http%3A%2F%2Fb-ssl.duitang.com%2Fuploads%2Fitem%2F201208%2F27%2F20120827144059_sijxK.jpeg