diff --git a/modules/core/src/opencl/arithm.cl b/modules/core/src/opencl/arithm.cl
index c8fd99eeff..5b73735530 100644
--- a/modules/core/src/opencl/arithm.cl
+++ b/modules/core/src/opencl/arithm.cl
@@ -196,12 +196,12 @@
 #elif defined OP_PHASE_RADIANS
 #define PROCESS_ELEM \
         workT tmp = atan2(srcelem2, srcelem1); \
-        if(tmp < 0) tmp += 6.283185307179586232; \
+        if(tmp < 0) tmp += 6.283185307179586232f; \
         dstelem = tmp
 
 #elif defined OP_PHASE_DEGREES
     #define PROCESS_ELEM \
-    workT tmp = atan2(srcelem2, srcelem1)*57.29577951308232286465; \
+    workT tmp = atan2(srcelem2, srcelem1)*57.29577951308232286465f; \
     if(tmp < 0) tmp += 360; \
     dstelem = tmp
 
@@ -223,7 +223,6 @@ dstelem = v > (dstT)(0) ? log(v) : log(-v)
 #define dstT uchar
 #define srcT2 srcT1
 #define convertToWT1
-#define convertToWT2
 #define PROCESS_ELEM dstelem = convert_uchar(srcelem1 CMP_OPERATOR srcelem2 ? 255 : 0)
 
 #elif defined OP_CONVERT_SCALE_ABS
@@ -313,7 +312,9 @@ __kernel void KF(__global const uchar* srcptr1, int srcstep1, int srcoffset1,
     if (x < cols && y < rows)
     {
         int src1_index = mad24(y, srcstep1, x*(int)sizeof(srcT1) + srcoffset1);
+#if !(defined(OP_RECIP_SCALE) || defined(OP_NOT))
         int src2_index = mad24(y, srcstep2, x*(int)sizeof(srcT2) + srcoffset2);
+#endif
         int dst_index  = mad24(y, dststep, x*(int)sizeof(dstT) + dstoffset);
         EXTRA_INDEX;
 
diff --git a/modules/imgproc/src/color.cpp b/modules/imgproc/src/color.cpp
index 1346f0a15c..e698690abe 100644
--- a/modules/imgproc/src/color.cpp
+++ b/modules/imgproc/src/color.cpp
@@ -2996,7 +2996,7 @@ static bool ocl_cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
         }
         else
             k.create(kernelName.c_str(), ocl::imgproc::cvtcolor_oclsrc,
-                     format("-D depth=%d -D hscale=%f -D bidx=%d -D scn=%d -D dcn=3", depth, hrange*(1.f/360.f), bidx, scn));
+                     format("-D depth=%d -D hscale=%ff -D bidx=%d -D scn=%d -D dcn=3", depth, hrange*(1.f/360.f), bidx, scn));
         break;
     }
     case COLOR_HSV2BGR: case COLOR_HSV2RGB: case COLOR_HSV2BGR_FULL: case COLOR_HSV2RGB_FULL:
@@ -3014,7 +3014,7 @@ static bool ocl_cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
 
         String kernelName = String(is_hsv ? "HSV" : "HLS") + "2RGB";
         k.create(kernelName.c_str(), ocl::imgproc::cvtcolor_oclsrc,
-                 format("-D depth=%d -D dcn=%d -D scn=3 -D bidx=%d -D hrange=%d -D hscale=%f",
+                 format("-D depth=%d -D dcn=%d -D scn=3 -D bidx=%d -D hrange=%d -D hscale=%ff",
                         depth, dcn, bidx, hrange, 6.f/hrange));
         break;
     }
diff --git a/modules/imgproc/src/imgwarp.cpp b/modules/imgproc/src/imgwarp.cpp
index a69ba8a2a8..e9fd60d5d3 100644
--- a/modules/imgproc/src/imgwarp.cpp
+++ b/modules/imgproc/src/imgwarp.cpp
@@ -2004,7 +2004,7 @@ static bool ocl_resize( InputArray _src, OutputArray _dst, Size dsize,
         {
             int wdepth2 = std::max(CV_32F, depth), wtype2 = CV_MAKE_TYPE(wdepth2, cn);
             buildOption = buildOption + format(" -D convertToT=%s -D WT2V=%s -D convertToWT2V=%s -D INTER_AREA_FAST"
-                                               " -D XSCALE=%d -D YSCALE=%d -D SCALE=%f",
+                                               " -D XSCALE=%d -D YSCALE=%d -D SCALE=%ff",
                                                ocl::convertTypeStr(wdepth2, depth, cn, cvt[0]),
                                                ocl::typeToStr(wtype2), ocl::convertTypeStr(wdepth, wdepth2, cn, cvt[1]),
                                   iscale_x, iscale_y, 1.0f / (iscale_x * iscale_y));
diff --git a/modules/imgproc/src/opencl/cvtcolor.cl b/modules/imgproc/src/opencl/cvtcolor.cl
index ad7562f3d7..1779c4fa77 100644
--- a/modules/imgproc/src/opencl/cvtcolor.cl
+++ b/modules/imgproc/src/opencl/cvtcolor.cl
@@ -472,7 +472,7 @@ __kernel void RGB(__global const uchar* srcptr, int src_step, int src_offset,
         dst[0] = src[2];
         dst[1] = src[1];
         dst[2] = src[0];
-#elif defined ORDER
+#else
         dst[0] = src[0];
         dst[1] = src[1];
         dst[2] = src[2];
@@ -728,7 +728,7 @@ __kernel void RGB2HSV(__global const uchar* srcptr, int src_step, int src_offset
 
         diff = v - vmin;
         s = diff/(float)(fabs(v) + FLT_EPSILON);
-        diff = (float)(60./(diff + FLT_EPSILON));
+        diff = (float)(60.f/(diff + FLT_EPSILON));
         if( v == r )
             h = (g - b)*diff;
         else if( v == g )
diff --git a/modules/imgproc/src/opencl/filterSepCol.cl b/modules/imgproc/src/opencl/filterSepCol.cl
index c990a6ca19..e99fa6ee03 100644
--- a/modules/imgproc/src/opencl/filterSepCol.cl
+++ b/modules/imgproc/src/opencl/filterSepCol.cl
@@ -71,7 +71,7 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void col_filter
                          const int dst_step_in_pixel,
                          const int dst_cols,
                          const int dst_rows,
-                         __constant float * mat_kernel __attribute__((max_constant_size(4*(2*RADIUSY+1)))))
+                         __constant float * mat_kernel)
 {
     int x = get_global_id(0);
     int y = get_global_id(1);
diff --git a/modules/imgproc/src/opencl/filterSepRow.cl b/modules/imgproc/src/opencl/filterSepRow.cl
index f276d08409..dfbf300999 100644
--- a/modules/imgproc/src/opencl/filterSepRow.cl
+++ b/modules/imgproc/src/opencl/filterSepRow.cl
@@ -154,7 +154,7 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
      int dst_step_in_pixel,
      int dst_cols, int dst_rows,
      int radiusy,
-     __constant float * mat_kernel __attribute__((max_constant_size(4*(2*RADIUSX+1)))))
+     __constant float * mat_kernel)
 {
     int x = get_global_id(0)<<2;
     int y = get_global_id(1);
@@ -298,7 +298,7 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
      int dst_step_in_pixel,
      int dst_cols, int dst_rows,
      int radiusy,
-     __constant float * mat_kernel __attribute__((max_constant_size(4*(2*RADIUSX+1)))))
+     __constant float * mat_kernel)
 {
     int x = get_global_id(0);
     int y = get_global_id(1);
@@ -392,7 +392,7 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
      int dst_step_in_pixel,
      int dst_cols, int dst_rows,
      int radiusy,
-     __constant float * mat_kernel __attribute__((max_constant_size(4*(2*RADIUSX+1)))))
+     __constant float * mat_kernel)
 {
     int x = get_global_id(0);
     int y = get_global_id(1);
@@ -485,7 +485,7 @@ __kernel __attribute__((reqd_work_group_size(LSIZE0,LSIZE1,1))) void row_filter_
      int dst_step_in_pixel,
      int dst_cols, int dst_rows,
      int radiusy,
-     __constant float * mat_kernel __attribute__((max_constant_size(4*(2*RADIUSX+1)))))
+     __constant float * mat_kernel)
 {
     int x = get_global_id(0);
     int y = get_global_id(1);
diff --git a/modules/imgproc/src/opencl/resize.cl b/modules/imgproc/src/opencl/resize.cl
index ecab2faa55..d4f2383586 100644
--- a/modules/imgproc/src/opencl/resize.cl
+++ b/modules/imgproc/src/opencl/resize.cl
@@ -78,7 +78,6 @@ __kernel void resizeLN(__global const uchar* srcptr, int srcstep, int srcoffset,
 
     int y_ = INC(y,srcrows);
     int x_ = INC(x,srccols);
-    __global const PIXTYPE* src = (__global const PIXTYPE*)(srcptr + mad24(y, srcstep, srcoffset + x*PIXSIZE));
 
 #if depth <= 4