add face match demo

example/vision/face/match.go

@@ -22,6 +22,5 @@ func Match() {
 	if err != nil {
 		panic(err)
 	}
-
 	fmt.Println(rs.ToString())
 }

example/vision/face/readme.md

@@ -12,6 +12,26 @@ rs, err := client.DetectAndAnalysis(
     vision.MustFromFile("face.jpg"),
     options,
 )
+if err != nil {
+    panic(err)
+}
+fmt.Println(rs.ToString())
+```
+
+- 人脸比对
+```Go
+client := face.NewFaceClient(APIKEY, APISECRET)
+
+rs, err := client.Match(
+    vision.MustFromFile("p1.jpg"),
+    vision.MustFromFile("p2.jpg"),
+    map[string]interface{}{
+        "ext_fields":     "qualities",                 //返回质量信息，取值固定，目前支持qualities(质量检测)(对所有图片都会做改处理)
+        "image_liveness": "faceliveness,faceliveness", //返回的活体信息，“faceliveness,faceliveness” 表示对比对的两张图片都做活体检测；“,faceliveness” 表示对第一张图片不做活体检测、第二张图做活体检测；“faceliveness,” 表示对第一张图片做活体检测、第二张图不做活体检测；
+        "types":          "7,7",
+    },
+)
+
 if err != nil {
     panic(err)
 }

vision/image.go

@@ -42,15 +42,15 @@ func FromFile(file string) (*Image, error) {
 		return nil, err
 	}
 
-	size, err := getImageSize(bytes.NewBuffer(imageContent))
+	size, err := getImageSize(bytes.NewReader(imageContent))
 	if err != nil {
 		return nil, err
 	}
 	if size.Height > MaxSize || size.Height < MinSize || size.Width > MaxSize || size.Width < MinSize {
 		return nil, errors.New("image size is invalid")
 	}
 
-	reader := bytes.NewBuffer(imageContent)
+	reader := bytes.NewReader(imageContent)
 
 	return &Image{
 		Reader: reader,