• lucene .NET 搜索图片 功能实现


    原创  lucene .NET 搜索图片 功能实现 收藏

    关于搜索部分

     1想建立索引。构建jpg图片解析器,在索引时将jpg图片的exif信息及其文本信息如名称,存放路径,大小,日期等等加入索引!具体实现代码如下:

    public void BulidIndex(string path)//创建索引

            {

                DateTime biStart = DateTime.Now;//创建索引开始

                DirectoryInfo[] ChildDirectory;//子目录集

                FileInfo[] files;//当前所有文件

                DirectoryInfo FatherDirectory = new DirectoryInfo(path); //当前目录

                ChildDirectory = FatherDirectory.GetDirectories("*.*"); //得到子目录集

                files = FatherDirectory.GetFiles("*.jpg");//得到jpg文件集,可以进行操作

     

                Analyzer analyzer = new MyAnalyzer();//声明一个分词器,

    IndexWriter indexWriter = new IndexWriter("index", analyzer, true);/*建立一个IndexWriter的实例,这个类是负责创建索引的,有很多构造函数,这里使用的是其中的一个。三个参数分别是:索引建立到哪个目录,用什么分词器,还有就是是否创建。如果是否创建为false,那么就是以增量的方式来创建。*/

                for (int i = 0; i < files.Length; i++)

                {

                    string maker = "unkown", explord = "unkown",

                           iso = "unkown", aperture = "unkown", focalLength="unkown";

                    Document doc = new Document();//声明一个document并将图片的名称,存放路径,大小,日期,

                                                 相机制造商,曝光度,ISO,焦距,光圈值依次通过field 添加入document中。

     

                    FindExifinfo(files[i].FullName, ref maker, ref explord, ref iso, ref focalLength, ref aperture);

                    doc.Add(new Field("Name", files[i].Name, Field.Store.YES, Field.Index.TOKENIZED));

                    doc.Add(new Field("FullName", files[i].FullName, Field.Store.YES, Field.Index.NO));

                    doc.Add(new Field("Length", files[i].Length.ToString(), Field.Store.YES, Field.Index.NO));

                    doc.Add(new Field("LastWriteTime", files[i].LastWriteTime.ToString(), Field.Store.YES, Field.Index.NO));

                    doc.Add(new Field("CreationTime", files[i].CreationTime.ToString(), Field.Store.YES, Field.Index.NO));

                    doc.Add(new Field("Maker", maker, Field.Store.YES, Field.Index.UN_TOKENIZED));

                    doc.Add(new Field("Explord", explord, Field.Store.YES, Field.Index.UN_TOKENIZED));

                    doc.Add(new Field("ISO", iso, Field.Store.YES, Field.Index.UN_TOKENIZED));

                    doc.Add(new Field("FocalLength", focalLength, Field.Store.YES, Field.Index.UN_TOKENIZED));

                    doc.Add(new Field("Aperture", aperture, Field.Store.YES, Field.Index.UN_TOKENIZED));

       indexWriter.AddDocument(doc); /*调用了AddDocument方法,在AddDocument方法中,先组织一个Docuement对象,然后把这个对象交给IndexWriter*/

     

                }

     

                indexWriter.Optimize();//Optimize优化索引           

    indexWriter.Close();//最后关闭创建过程

                DateTime biStop = DateTime.Now;//创建索引结束

                this.status1.Text = "创建索引用时:" + (biStop - biStart).TotalSeconds + "";

            }

    2 执行搜索并获取结果:

     private void button1_Click(object sender, EventArgs e)

            {

     

                listView1.Items.Clear();

                Hits hits = null;

                Query query = null;

                Analyzer analyzer = new MyAnalyzer();

                DateTime Start = DateTime.Now;//索引开始时间

                string TEXT= this.tbkey.Text;

                BooleanQuery BQ = new BooleanQuery( );   //使用Boolean 查询  

                if (TEXT == "")

                    return;

                try

                {

                  switch (this.comboBox1.SelectedIndex)

                    {

                        case 0:

                            QueryParser parser = new QueryParser("Name", analyzer);

                            query = parser.Parse(tbkey.Text);

         

                            break;

                        case 1: //使用Boolean 查询 含有某个关键词或其他关键词 should 表示“或”的关系

                            Term T2 = new Term("Maker", TEXT);

                            TermQuery q2 = new TermQuery(T2);

                            BQ.Add(q2, BooleanClause.Occur.SHOULD);

                            break;

                        case 2: //按照片的ISO速率进行搜索

                            Term T3 = new Term("ISO", TEXT);

                            TermQuery q3 = new TermQuery(T3);

                            BQ.Add(q3, BooleanClause.Occur.SHOULD);

                            break;

                        case 3: //按照片的 曝光度进行搜索

                            Term T4 = new Term("Explord", TEXT);

                            TermQuery q4 = new TermQuery(T4);

                            BQ.Add(q4, BooleanClause.Occur.SHOULD);

                            break;

                        case 4: //按照片的 焦距进行搜索

                            Term T5 = new Term("FocalLength", TEXT);

                            TermQuery q5 = new TermQuery(T5);

                            BQ.Add(q5, BooleanClause.Occur.SHOULD);

                            break;

                        case 5: //按照片的光圈进行搜索

                            Term T6 = new Term("Aperture", TEXT);

                            TermQuery q6 = new TermQuery(T6);

                            BQ.Add(q6, BooleanClause.Occur.SHOULD);

                            break;

                        default: break;

                   

                    }

                }

                catch (Exception)

                {

                    throw;

                }

     

                IndexSearcher searcher = new IndexSearcher("index");

     

                if (searcher != null)

                {

                    if( 0 == this.comboBox1.SelectedIndex) //使用if语句对搜索方式进行分类,如果是按照相片或图片名称进行搜索则进行关键字匹配查询

                        hits = searcher.Search(query);

                    else

                        hits = searcher.Search(BQ); //如果不是按名称搜索,则进行严格匹配查询搜索!

     

                    if (hits.Length() > 0)

                    {

                        this.status1.Text = 共检索 " + hits.Length().ToString() + "个对象";

                    }

                    this.imageList.Images.Clear();

                    for (int i = 0; i < hits.Length(); i++)

                    { //将搜索结果分别添加入listview和imagelist中,此过程比较耗时间!无奈!!!

                        Document doc = hits.Doc(i);

                        int itemNumber = this.listView1.Items.Count;

                        //string fullname = doc.Get("FullName");

                      string[] subItem = { doc.Get("Name"), doc.Get("FullName"), (Convert.ToInt32(doc.Get("Length")) >> 10).ToString() + "KB", doc.Get("LastWriteTime") }; //使用右移 加快程序的执行速度!

                      this.imageList.Images.Add(doc.Get("FullName"), Bitmap.FromFile(doc.Get("FullName")));

                      this.listView1.Items.Add(new ListViewItem(subItem, doc.Get("FullName")));//显示结果较慢的元凶!

                    }

                }

                else

                {

                    this.status1.Text = 共检索 0 个对象";

                }

     

                DateTime Stop = DateTime.Now;//索引完成时间

                this.status1.Text += " 搜索用时:" + (Stop - Start).TotalSeconds + "";

    运行效果图:

  • 相关阅读:
    20210108 android学习
    20210106 android学习
    20210105 android学习
    20210104 android学习
    httpClient请求转发个人理解
    CefSharp如何判断页面是否加载完
    C#/WPF 使用的Task线程程序缺依旧响应缓慢问题
    修改LiveChart的提示显示位置
    Wpf双击放大缩小界面
    WPF设置无边框CefSharp显示不出来问题
  • 原文地址:https://www.cnblogs.com/wycg1984/p/1722388.html
Copyright © 2020-2023  润新知