add utilities

scripts/extract_hw_1.sh

@@ -0,0 +1,13 @@
+#! /bin/bash
+
+rm -rf homework_1
+mkdir homework_1
+hws=$(find . -wholename "*/lab0_intro/questions.md")
+for hw in ${hws[*]}
+do
+name=${hw:2}
+slash_i=$(( `expr index "$name" /` - 1 ))
+name=${name:0:$slash_i}
+echo $name
+cp $hw homework_1/$name.md
+done

scripts/fetch_repos.sh

@@ -0,0 +1,21 @@
+#! /bin/bash
+
+echo NOT AVAILABLE > errors.txt
+
+while read u
+do
+    REPO=https://github.com/$u/lab_vision
+    #test connection
+    echo $REPO
+    wget -q --spider $REPO
+    status=$?
+    if [ $status -eq 0 ]
+    then
+        rm -rf $u
+        git clone --progress https://github.com/$u/lab_vision $u
+    else
+        echo Not available
+        echo $u >> errors.txt
+    fi
+    sleep 10
+done < gh_users.txt

scripts/offuscate_names.py

@@ -0,0 +1,23 @@
+import os
+import hmac
+import base64
+import glob
+import hashlib
+from itertools import izip
+import csv
+
+in_dir='/home/pabloa/imagenet_tiny/test'
+out_dir='/home/pabloa/imagenet_tiny/test_o'
+cats_file='/home/pabloa/imagenet_tiny/cats_o.csv'
+key='gBWJPpeNYUeotZfCXacO'
+
+os.chdir(in_dir)
+
+imgs = glob.glob('*/*.JPEG')
+hashes = [base64.urlsafe_b64encode(hmac.new(key,f,hashlib.sha1).hexdigest()) for f in imgs ]
+for f,o in izip(imgs,hashes):
+    os.symlink(os.path.join(in_dir,f),os.path.join(out_dir,o+".JPEG"))
+
+with open(cats_file,"wb") as csv_file:
+    w=csv.writer(csv_file)
+    w.writerows(l for l in izip(hashes,(os.path.split(f)[0] for f in imgs)) )

scripts/rand_patches.m

@@ -0,0 +1,11 @@
+function ps=rand_patches(im,pw,ph,np)
+w=size(im,1);
+h=size(im,2);
+ps=zeros(pw,ph,np);
+for i=1:np
+    p_x=randi(w-pw);
+    p_y=randi(h-ph);
+    p=im(p_x:p_x+pw-1,p_y:p_y+ph-1);
+    ps(:,:,i)=p;    
+end
+end