pica pica (Magpie)

介绍

用于对图片进行对比，并标识出不同区域的应用。

Usage

mvn tomcat7:run

open http://localhost:8080/pica-pica

Thanks:

http://www.lac.inpe.br/JIPCookbook

http://blog.csdn.net/jia20003/article/details/7771651

开放的API接口

1./api/image/compare

http请求方式：POST[multipart/form-data]

   **form参数：**   
   sourceFile  源图片   
   candidateFile 要比较的图片   
   col 图片切分为几列    
   row 图片切分为几行
   similarityThreshold 阈值，低于这个相似度认为图片是不同的

返回JSON：

   {"match":true,"diffImageId":"038d245a-ae22-460d-b123-66dd11fcdaf5","links":[]}

如何调用?

• 使用Spring RestTemplate

    long beginTime = System.currentTimeMillis();
    RestTemplate template = new RestTemplate();
    MultiValueMap<String, Object> form = new LinkedMultiValueMap<String, Object>();
    form.add("sourceFile", new FileSystemResource("/home/shenyanchao/Pictures/ubuntu-011.jpg"));
    form.add("candidateFile", new FileSystemResource("/home/shenyanchao/Pictures/ubuntu-011.jpg"));
    form.add("col", 20);
    form.add("row", 20);
    form.add("similarityThreshold", 0.8);
    ResponseEntity<String> responseEntity = template.postForEntity("http://localhost:8080/pica-pica/api/image/compare", form, String.class);
    String result = responseEntity.getBody();
    long endTime = System.currentTimeMillis();
    System.out.println(result);
    System.out.println("耗时(ms):" + (endTime - beginTime));

• 使用httpclient

    HttpClient client = new DefaultHttpClient();
    HttpPost post = new HttpPost("http://localhost:8080/pica-pica/api/image/compare");
    MultipartEntity entity = new MultipartEntity();
    entity.addPart("sourceFile", new FileBody(new File("/home/shenyanchao/Pictures/ubuntu-011.jpg")));
    entity.addPart("candidateFile", new FileBody(new File("/home/shenyanchao/Pictures/ubuntu-011.jpg")));
    entity.addPart("col", new StringBody("20"));
    entity.addPart("row", new StringBody("20"));
    entity.addPart("similarityThreshold", new StringBody("0.8"));
    post.setEntity(entity);
    HttpResponse response = client.execute(post);
    String returnStr = EntityUtils.toString(response.getEntity());
    client.getConnectionManager().shutdown();
    System.out.println(returnStr);

2. /api/image/${id}

**http请求方式**：GET
参数：id 上面返回的diffImageId值

如何调用？

    InputStream is =
            new URL("http://localhost:8080/pica-pica/api/image/d38719d1-3246-4e96-b444-6d7310156fad").openStream();
    FileOutputStream out = new FileOutputStream(new File("/home/shenyanchao/change.png"));
    IOUtils.copy(is, out);
    out.close();
    is.close();

或者可以直接在浏览器查看http://localhost:8080/pica-pica/upload/d38719d1-3246-4e96-b444-6d7310156fad.png