[CPU]fix accuracy problem for CheckValid

mindspore/ccsrc/backend/kernel_compiler/cpu/check_valid_cpu_kernel.cc

@@ -24,6 +24,9 @@ namespace kernel {
 namespace {
 constexpr size_t kInputSize = 2;
 constexpr size_t kOutputSize = 1;
+constexpr size_t kIndex0 = 0;
+constexpr size_t kIndex1 = 1;
+constexpr size_t kIndex2 = 2;
 }  // namespace
 
 template <typename T>
@@ -45,12 +48,15 @@ bool CheckValidCPUKernel<T>::Launch(const std::vector<kernel::AddressPtr> &input
   auto output = reinterpret_cast<bool *>(outputs[0]->addr);
   const size_t elem_num = inputs[0]->size / sizeof(T) / COORDINATE;
 
-  auto task = [this, &anchor_box, &img_metas, &output](size_t start, size_t end) {
+  const double offset = 1.0;
+  auto height = static_cast<double>(img_metas[kIndex0]);
+  auto width = static_cast<double>(img_metas[kIndex1]);
+  auto ratio = static_cast<double>(img_metas[kIndex2]);
+  auto img_width_x = width * ratio - offset;
+  auto img_height_y = height * ratio - offset;
+
+  auto task = [this, &anchor_box, &img_width_x, &img_height_y, &output](size_t start, size_t end) {
     const T ZERO = static_cast<T>(0);
-    const T ONE = static_cast<T>(1);
-    constexpr size_t OFFSET_ZERO = 0;
-    constexpr size_t OFFSET_ONE = 1;
-    constexpr size_t OFFSET_TWO = 2;
     for (size_t i = start; i < end; i++) {
       const size_t left_x = i * 4;
       const size_t left_y = i * 4 + 1;
@@ -60,8 +66,8 @@ bool CheckValidCPUKernel<T>::Launch(const std::vector<kernel::AddressPtr> &input
       bool valid_flag = false;
       valid_flag |= std::less<T>()(anchor_box[left_x], ZERO);
       valid_flag |= std::less<T>()(anchor_box[left_y], ZERO);
-      valid_flag |= std::less<T>()(img_metas[OFFSET_ONE] * img_metas[OFFSET_TWO] - ONE, anchor_box[right_x]);
-      valid_flag |= std::less<T>()(img_metas[OFFSET_ZERO] * img_metas[OFFSET_TWO] - ONE, anchor_box[right_y]);
+      valid_flag |= std::less<double>()(img_width_x, static_cast<double>(anchor_box[right_x]));
+      valid_flag |= std::less<double>()(img_height_y, static_cast<double>(anchor_box[right_y]));
 
       output[i] = !valid_flag;
     }