diff --git a/hgdriver/hgdev/image_process.cpp b/hgdriver/hgdev/image_process.cpp
index 5796541..0e6ac5d 100644
--- a/hgdriver/hgdev/image_process.cpp
+++ b/hgdriver/hgdev/image_process.cpp
@@ -863,7 +863,7 @@ namespace hg_imgproc
 
 			//VLOG_MINI_4(LOG_LEVEL_DEBUG_INFO, "adjust_color: table len = %d, brightness = %f, contrast = %f, gamma = %f\n", tableLength
 			//	, img_conf_.brightness, img_conf_.contrast, img_conf_.gamma);
-			if (gamma_table && tableLength)
+			if (gamma_table && tableLength && img_conf_.pixtype != COLOR_MODE_AUTO_MATCH)
 			{
 				CImageApplyCustomGamma gamme(gamma_table, tableLength);