update scripts; create cache dir if needed

data/scripts/fetch_fast_rcnn_models.sh

@@ -4,7 +4,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../" && pwd )"
 cd $DIR
 
 FILE=fast_rcnn_models.tgz
-URL=http://www.cs.berkeley.edu/~rbg/fast-rcnn-data/fast_rcnn_models.tgz
+URL=http://www.cs.berkeley.edu/~rbg/fast-rcnn-data/$FILE
 CHECKSUM=5f7dde9f5376e18c8e065338cc5df3f7
 
 if [ -f $FILE ]; then

data/scripts/fetch_imagenet_models.sh

@@ -4,7 +4,7 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../" && pwd )"
 cd $DIR
 
 FILE=imagenet_models.tgz
-URL=http://www.cs.berkeley.edu/~rbg/fast-rcnn-data/imagenet_models.tgz
+URL=http://www.cs.berkeley.edu/~rbg/fast-rcnn-data/$FILE
 CHECKSUM=8b1d4b9da0593fc70ef403284f810adc
 
 if [ -f $FILE ]; then

data/scripts/fetch_selective_search_data.sh

@@ -4,8 +4,8 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../" && pwd )"
 cd $DIR
 
 FILE=selective_search_data.tgz
-URL=http://www.cs.berkeley.edu/~rbg/r-cnn-release1-selective-search.tgz
-CHECKSUM=6cf6df219c1e514f64482f11d00bd0b4
+URL=http://www.cs.berkeley.edu/~rbg/fast-rcnn-data/$FILE
+CHECKSUM=7078c1db87a7851b31966b96774cd9b9
 
 if [ -f $FILE ]; then
   echo "File already exists. Checking md5..."
@@ -23,7 +23,7 @@ if [ -f $FILE ]; then
   fi
 fi
 
-echo "Downloading precomputed selective search boxes (1.8G)..."
+echo "Downloading precomputed selective search boxes (0.5G)..."
 
 wget $URL -O $FILE
 

lib/datasets/imdb.py

@@ -6,6 +6,7 @@
 # --------------------------------------------------------
 
 import os
+import os.path as osp
 import PIL
 from utils.cython_bbox import bbox_overlaps
 import numpy as np
@@ -64,7 +65,10 @@ class imdb(object):
 
     @property
     def cache_path(self):
-        return os.path.join(datasets.ROOT_DIR, 'data', 'cache')
+        cache_path = osp.abspath(osp.join(datasets.ROOT_DIR, 'data', 'cache'))
+        if not os.path.exists(cache_path):
+            os.makedirs(cache_path)
+        return cache_path
 
     @property
     def num_images(self):