removed unnecessary code from gpu::matchTemplate

modules/gpu/src/cuda/match_template.cu

@@ -559,8 +559,8 @@ __global__ void matchTemplatePreparedKernel_CCOFF_NORMED_8U(
         float image_sqsum_ = (float)(
                 (image_sqsum.ptr(y + h)[x + w] - image_sqsum.ptr(y)[x + w]) -
                 (image_sqsum.ptr(y + h)[x] - image_sqsum.ptr(y)[x]));
-        result.ptr(y)[x] = min(1.f, (ccorr - image_sum_ * templ_sum_scale) * 
-                                    rsqrtf(templ_sqsum_scale * max(1.f, image_sqsum_ - weight * image_sum_ * image_sum_)));
+        result.ptr(y)[x] = (ccorr - image_sum_ * templ_sum_scale) * 
+                           rsqrtf(templ_sqsum_scale * max(1.f, image_sqsum_ - weight * image_sum_ * image_sum_));
     }
 }
 
@@ -612,8 +612,8 @@ __global__ void matchTemplatePreparedKernel_CCOFF_NORMED_8UC2(
         float ccorr = result.ptr(y)[x];
         float rdenom = rsqrtf(templ_sqsum_scale * max(1.f, image_sqsum_r_ - weight * image_sum_r_ * image_sum_r_ 
                                                            + image_sqsum_g_ - weight * image_sum_g_ * image_sum_g_));
-        result.ptr(y)[x] = min(1.f, (ccorr - image_sum_r_ * templ_sum_scale_r
-                                     - image_sum_g_ * templ_sum_scale_g) * rdenom);
+        result.ptr(y)[x] = (ccorr - image_sum_r_ * templ_sum_scale_r
+                                  - image_sum_g_ * templ_sum_scale_g) * rdenom;
     }
 }
 
@@ -681,9 +681,9 @@ __global__ void matchTemplatePreparedKernel_CCOFF_NORMED_8UC3(
         float rdenom = rsqrtf(templ_sqsum_scale * max(1.f, image_sqsum_r_ - weight * image_sum_r_ * image_sum_r_ 
                                                            + image_sqsum_g_ - weight * image_sum_g_ * image_sum_g_
                                                            + image_sqsum_b_ - weight * image_sum_b_ * image_sum_b_));
-        result.ptr(y)[x] = min(1.f, (ccorr - image_sum_r_ * templ_sum_scale_r
-                                     - image_sum_g_ * templ_sum_scale_g
-                                     - image_sum_b_ * templ_sum_scale_b) * rdenom);
+        result.ptr(y)[x] = (ccorr - image_sum_r_ * templ_sum_scale_r
+                                  - image_sum_g_ * templ_sum_scale_g
+                                  - image_sum_b_ * templ_sum_scale_b) * rdenom;
     }
 }
 
@@ -764,10 +764,10 @@ __global__ void matchTemplatePreparedKernel_CCOFF_NORMED_8UC4(
                                                            + image_sqsum_g_ - weight * image_sum_g_ * image_sum_g_
                                                            + image_sqsum_b_ - weight * image_sum_b_ * image_sum_b_
                                                            + image_sqsum_a_ - weight * image_sum_a_ * image_sum_a_));
-        result.ptr(y)[x] = min(1.f, (ccorr - image_sum_r_ * templ_sum_scale_r
-                                     - image_sum_g_ * templ_sum_scale_g
-                                     - image_sum_b_ * templ_sum_scale_b
-                                     - image_sum_a_ * templ_sum_scale_a) * rdenom);
+        result.ptr(y)[x] = (ccorr - image_sum_r_ * templ_sum_scale_r
+                                  - image_sum_g_ * templ_sum_scale_g
+                                  - image_sum_b_ * templ_sum_scale_b
+                                  - image_sum_a_ * templ_sum_scale_a) * rdenom;
     }
 }
 
@@ -822,7 +822,7 @@ __global__ void normalizeKernel_8U(
         float image_sqsum_ = (float)(
                 (image_sqsum.ptr(y + h)[(x + w) * cn] - image_sqsum.ptr(y)[(x + w) * cn]) -
                 (image_sqsum.ptr(y + h)[x * cn] - image_sqsum.ptr(y)[x * cn]));
-        result.ptr(y)[x] = min(1.f, result.ptr(y)[x] * rsqrtf(max(1.f, image_sqsum_) * templ_sqsum));
+        result.ptr(y)[x] = result.ptr(y)[x] * rsqrtf(max(1.f, image_sqsum_) * templ_sqsum);
     }
 }
 

tests/gpu/src/match_template.cpp

@@ -124,7 +124,7 @@ struct CV_GpuMatchTemplateTest: CvTest
                     F(t = clock();)
                     gpu::matchTemplate(gpu::GpuMat(image), gpu::GpuMat(templ), dst, CV_TM_CCORR_NORMED);
                     F(cout << "gpu_block: " << clock() - t << endl;)
-                    if (!check(dst_gold, Mat(dst), h * w * 1e-4f)) return;
+                    if (!check(dst_gold, Mat(dst), h * w * 1e-6f)) return;
 
                     gen(image, n, m, CV_8U, cn);
                     gen(templ, h, w, CV_8U, cn);
@@ -146,7 +146,7 @@ struct CV_GpuMatchTemplateTest: CvTest
                     F(t = clock();)
                     gpu::matchTemplate(gpu::GpuMat(image), gpu::GpuMat(templ), dst, CV_TM_CCOEFF_NORMED);
                     F(cout << "gpu_block: " << clock() - t << endl;)
-                    if (!check(dst_gold, Mat(dst), h * w * 1e-4f)) return;
+                    if (!check(dst_gold, Mat(dst), h * w * 1e-6f)) return;
 
                     gen(image, n, m, CV_32F, cn);
                     gen(templ, h, w, CV_32F, cn);