Google 到 API 的视觉连接，无需外部 google DLL

Question

如何在不使用外部 dll 的情况下连接到 google 云视觉？

Answer 1

首先，你必须生成JSON请求，简单的例子：

            Request req = new Request();
            req.addFeature("DOCUMENT_TEXT_DETECTION"); //Add here all the feature types
            req.Image.content = Convert.ToBase64String(qq);//qq is a byte[]
            Requests reqList = new Requests(req);
            json = JsonConvert.SerializeObject(reqList);

其次，您需要post简单的HTTP请求：

var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://vision.googleapis.com/v1/images:annotate?key="PLACE_YOURKEY_HERE"");
                httpWebRequest.ContentType = "application/json";
                httpWebRequest.Method = "POST";
                using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
                {
                    streamWriter.Write(json);
                }

                var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
                {
                    response = streamReader.ReadToEnd();
                }

JSON 类 的成员（应该实现的方法）：

    class Requests
{
    public List<Request> Request { get; set; }
}
class Request
{
    public Image1 Image { get; set; }
    public List<Feature> Features { get; set; }

}
public class Feature
{
    public string Type { get; set; }
}

public class Image1
{
    public string content { get; set; }
}

与主题相关的链接

Google Vision API Document_Text_Detection

Feature types

Google vision