!7287 [MD] minddata fix opencv float exception issue

Merge pull request !7287 from xiefangqi/md_fix_opencv_issue

mindspore/ccsrc/minddata/dataset/kernels/image/image_utils.cc

@@ -98,7 +98,7 @@ Status Resize(const std::shared_ptr<Tensor> &input, std::shared_ptr<Tensor> *out
     RETURN_STATUS_UNEXPECTED("Input Tensor is not in shape of <H,W,C> or <H,W>");
   }
   // OpenCv lanuch too many threads.
-  cv::setNumThreads(0);
+  cv::setNumThreads(8);
   cv::Mat in_image = input_cv->mat();
   // resize image too large or too small
   if (output_height == 0 || output_height > in_image.rows * 1000 || output_width == 0 ||