!3814 enhance: map file label start begin 0 in imagenet_to_mr tool

Merge pull request !3814 from liucunwei/enhance_map_file_for_imagenet

mindspore/mindrecord/tools/imagenet_to_mr.py

@@ -35,10 +35,10 @@ class ImageNetToMR:
 
                   .. code-block::
 
-                      n02119789 1 pen
-                      n02100735 2 notebook
-                      n02110185 3 mouse
-                      n02096294 4 orange
+                      n02119789 0
+                      n02100735 1
+                      n02110185 2
+                      n02096294 3
 
         image_dir (str): image directory contains n02119789, n02100735, n02110185, n02096294 dir.
         destination (str): the MindRecord file path to transform into.

model_zoo/utils/cv_to_mindrecord/ImageNet_Similar_Perf/README.md

@@ -28,12 +28,12 @@ This example provides an efficient way to generate MindRecord. Users only need t
 
     Store the downloaded ImageNet dataset in a folder. The folder contains all images and a mapping file that records labels of the images.
 
-    In the mapping file, there are three columns, which are separated by spaces. They indicate image classes, label IDs, and label names. The following is an example of the mapping file:
+    In the mapping file, there are three columns, which are separated by spaces. They indicate image classes and label IDs. The following is an example of the mapping file:
     ```
-    n02119789 1 pen
-    n02100735 2 notbook
-    n02110185 3 mouse
-    n02096294 4 orange
+    n02119789 0
+    n02100735 1
+    n02110185 2
+    n02096294 3
     ```
 
 2. Edit run_imagenet.sh and modify the parameters

tests/ut/data/mindrecord/testImageNetDataWhole/labels_map.txt

@@ -1,4 +1,4 @@
-n00000005 0 data_line
-n00000006 1 small_iron_box
-n00000007 2 plastic_toothpicks
-n00000002 3 orange
+n00000005 0
+n00000006 1
+n00000007 2
+n00000002 3