diff --git a/service/visual/model/model_convert_photov2.go b/service/visual/model/model_convert_photov2.go
index 41ae14c2..0f4a7a8c 100644
--- a/service/visual/model/model_convert_photov2.go
+++ b/service/visual/model/model_convert_photov2.go
@@ -6,7 +6,7 @@ import "github.com/volcengine/volc-sdk-golang/base"
 
 type ConvertPhotoV2Request struct {
 	ReqKey           string   `json:"req_key"`
-	BinaryDataBase64 []string `json:"binary_data_base64"`
+	BinaryDataBase64 []string `json:"binary_data_base64,omitempty"`
 	ImageUrls        []string `json:"image_urls"`
 	IsColor          bool     `json:"is_color"` // Deprecated
 	IfColor          int      `json:"if_color"`