From a714934c86a0061bfc591b214b26cc42535e41a1 Mon Sep 17 00:00:00 2001
From: Karnav Shah <shahkarnav115@gmail.com>
Date: Mon, 22 Dec 2025 01:25:48 +0530
Subject: [PATCH] dnn: add error message for unimplemented UMat NCHW blob
 conversion

---
 modules/dnn/src/dnn_utils.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/dnn/src/dnn_utils.cpp b/modules/dnn/src/dnn_utils.cpp
index 87561d0e50..b6f1d3fcce 100644
--- a/modules/dnn/src/dnn_utils.cpp
+++ b/modules/dnn/src/dnn_utils.cpp
@@ -228,7 +228,7 @@ void blobFromImagesNCHW(const std::vector<Mat>& images, Mat& blob_, const Image2
 template<typename Tout>
 void blobFromImagesNCHW(const std::vector<UMat>& images, UMat& blob_, const Image2BlobParams& param)
 {
-    CV_Error(Error::StsNotImplemented, "");
+    CV_Error(Error::StsNotImplemented, "blobFromImagesNCHW is not implemented for UMat inputs");
 }
 
 template<class Tmat>