!3262 change centercrop size

Merge pull request !3262 from panfengfeng/change_centercrop_size

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

@@ -37,8 +37,8 @@ Status CenterCropOp::Compute(const std::shared_ptr<Tensor> &input, std::shared_p
   int32_t left = crop_wid_ - input->shape()[1];
   std::shared_ptr<Tensor> pad_image;
 
-  CHECK_FAIL_RETURN_UNEXPECTED((top < input->shape()[0] * 10 && left < input->shape()[1] * 10),
-                               "CenterCropOp padding size is too big, it's more than 10 times the original size.");
+  CHECK_FAIL_RETURN_UNEXPECTED((top < input->shape()[0] * 3 && left < input->shape()[1] * 3),
+                               "CenterCropOp padding size is too big, it's more than 3 times the original size.");
 
   if (top > 0 && left > 0) {  // padding only
     return Pad(input, output, top / 2 + top % 2, top / 2, left / 2 + left % 2, left / 2, BorderType::kConstant);

tests/ut/python/dataset/test_center_crop.py

@@ -145,7 +145,7 @@ def test_center_crop_errors():
     try:
         test_center_crop_op(16777216, 16777216)
     except RuntimeError as e:
-        assert "Unexpected error. CenterCropOp padding size is too big, it's more than 10 times the original size." in \
+        assert "Unexpected error. CenterCropOp padding size is too big, it's more than 3 times the original size." in \
                str(e)