diff --git a/src/imagepipeline.cpp b/src/imagepipeline.cpp
index 8a316f5..0b72dfe 100644
--- a/src/imagepipeline.cpp
+++ b/src/imagepipeline.cpp
@@ -29,7 +29,8 @@ void ImagePipeline::applyDarkMap(cv::Mat& image, const cv::Mat& darkmap)
 			cv::cvtColor(darkmap, localDarkMap,  cv::COLOR_BGR2GRAY);
 		else if(image.channels() == 3 && darkmap.channels() == 1)
 			cv::cvtColor(darkmap, localDarkMap,  cv::COLOR_GRAY2BGR);
-		else
+
+		if(!localDarkMap.data || image.channels() != localDarkMap.channels())
 			return;
 	}
 	else