diff --git a/hgdriver/hgdev/image_process.cpp b/hgdriver/hgdev/image_process.cpp
index 0e6ac5d..704ba69 100644
--- a/hgdriver/hgdev/image_process.cpp
+++ b/hgdriver/hgdev/image_process.cpp
@@ -489,7 +489,7 @@ namespace hg_imgproc
 					}	
 					cv::Mat mat;
 					if (true)
-						mat(cv::imdecode(*buf, rmc));
+						mat = cv::imdecode(*buf, rmc);
 					else
 						mat = cv::Mat(512 * 5, 15552 / 3, CV_8UC1, buf->data(), cv::Mat::AUTO_STEP).clone();
 					//cv::imwrite("C:\\Users\\modehua\\Desktop\\image\\imdecode.jpg",mat);