diff --git a/modules/imgproc/src/opencl/medianFilter.cl b/modules/imgproc/src/opencl/medianFilter.cl
index fef80e4b8..6aed88ef7 100644
--- a/modules/imgproc/src/opencl/medianFilter.cl
+++ b/modules/imgproc/src/opencl/medianFilter.cl
@@ -62,7 +62,7 @@ __kernel void medianFilter3(__global const uchar* srcptr, int srcStep, int srcOf
 
     r = clamp(dy+dr+9, 0, rows-1);
     int index9 = mad24(r, srcStep, srcOffset + c*scnbytes);
-    
+
     __global DATA_TYPE * src = (__global DATA_TYPE *)(srcptr + index1);
     data[dr][dc] = src[0];
 
@@ -83,7 +83,7 @@ __kernel void medianFilter3(__global const uchar* srcptr, int srcStep, int srcOf
     op(p4, p2); op(p6, p4); op(p4, p2);
 
     int dst_index = mad24( gy, dstStep, dstOffset + gx * scnbytes);
-    
+
     if( gy < rows && gx < cols)
     {
         __global DATA_TYPE* dst = (__global DATA_TYPE *)(dstptr + dst_index);
diff --git a/modules/imgproc/src/smooth.cpp b/modules/imgproc/src/smooth.cpp
index fe13bed45..c3991212e 100644
--- a/modules/imgproc/src/smooth.cpp
+++ b/modules/imgproc/src/smooth.cpp
@@ -1668,7 +1668,7 @@ namespace cv
         int type = _src.type();
         int depth = CV_MAT_DEPTH(type), cn = CV_MAT_CN(type);
 
-        if (!((depth == CV_8U || depth == CV_16U || depth == CV_16S || depth == CV_32F) && (cn == 1 || cn == 4)))
+        if (!((depth == CV_8U || depth == CV_16U || depth == CV_16S || depth == CV_32F) && (cn != 3 || cn <= 4)))
             return false;
 
         const char * kernelName;
@@ -1696,7 +1696,7 @@ namespace cv
 
 void cv::medianBlur( InputArray _src0, OutputArray _dst, int ksize )
 {
-    CV_Assert( ksize % 2 == 1 );
+    CV_Assert( (ksize % 2 == 1) &&  (_src0.dims() <= 2 ));
 
     if( ksize <= 1 )
     {
diff --git a/modules/imgproc/test/ocl/test_medianfilter.cpp b/modules/imgproc/test/ocl/test_medianfilter.cpp
index 51d8d6a0a..011619726 100644
--- a/modules/imgproc/test/ocl/test_medianfilter.cpp
+++ b/modules/imgproc/test/ocl/test_medianfilter.cpp
@@ -102,7 +102,7 @@ OCL_TEST_P(MedianFilter, Mat)
 
 OCL_INSTANTIATE_TEST_CASE_P(ImageProc, MedianFilter, Combine(
                                 Values(CV_8U, CV_16U, CV_16S, CV_32F),
-                                Values(1, 4),
+                                Values(1, 2, 4),
                                 Values(3, 5),
                                 Bool())
                            );