no way to compare when less than two revisions

Differences

This shows you the differences between two versions of the page.

@@ Line 1: / Line 1: @@
+====== Compare folder contents ======
+===== Find incoherence in your backups =====
+<code bash>
+cedric@debian:~/multimedia$ find ./photographs/ -type f -exec sha1sum {} \; | sort > dir1_sha1
+cedric@debian:~/multimedia$ cd /mnt/nas/
+cedric@debian:/mnt/nas$ find ./photographs/ -type f -exec sha1sum {} \; | sort > dir2_sha1
+cedric@debian:/mnt/nas$ diff --brief /home/cedric/multimedia/dir1_sha1 ./dir2_sha1
+</code>
+====== Focal length repartition ======
+<code python>
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+import pylab
+import glob
+from collections import Counter
+from PIL import Image
+from PIL.ExifTags import TAGS
+DIRECTORY = "/home/cedric/vienna/*.JPG"
+def get_exif(fn):
+    ret = {}
+    i = Image.open(fn)
+    info = i._getexif()
+    if info is not None:
+        for tag, value in info.items():
+            decoded = TAGS.get(tag, tag)
+            ret[decoded] = value
+    return ret
+if __name__ == "__main__":
+    cnt = Counter()
+    pictures = glob.glob(DIRECTORY)
+    focal = Counter()
+    for picture in pictures:
+        exif = get_exif(picture)
+        if exif != {}:
+            focal[exif['FocalLength'][0]] += 1
+    if focal:
+        length = len(focal)
+        ind = pylab.arange(length)
+        width = 0.35 # bars width
+        focal_list = [elem for elem in focal.keys()]
+        focal_count = [elem for elem in focal.values()]
+        max_focal_count = max(focal_count)  # max focal_count
+        p = pylab.bar(ind, focal_count, width, color='r')
+        pylab.ylabel("Number of shots")
+        pylab.xlabel("Focal length")
+        pylab.title("Focal length repartition for " + str(sum(focal_count)) + " pictures")
+        pylab.xticks(ind + (width / 2), focal_list)
+        pylab.xlim(-width, len(ind))
+        # changing the ordinate scale according to the max.
+        if max_focal_count <= 100:
+            pylab.ylim(0, max_focal_count + 5)
+            pylab.yticks(pylab.arange(0, max_focal_count + 5, 5))
+        elif max_focal_count <= 200:
+            pylab.ylim(0, max_focal_count + 10)
+            pylab.yticks(pylab.arange(0, max_focal_count + 10, 10))
+        elif max_focal_count <= 600:
+            pylab.ylim(0, max_focal_count + 25)
+            pylab.yticks(pylab.arange(0, max_focal_count + 25, 25))
+        elif max_focal_count <= 800:
+            pylab.ylim(0, max_focal_count + 50)
+            pylab.yticks(pylab.arange(0, max_focal_count + 50, 50))
+        for rect in p:
+            height = rect.get_height()
+            pylab.text(rect.get_x()+rect.get_width()/2., 1.05*height, '%d'%int(height),
+                    ha='center', va='bottom')
+        pylab.show()
+    else:
+        print "No result."
+</code>
+====== Piwigo ======
+<code python>
+! /usr/local/bin/python
+-*- coding: utf-8 -*-
+"""piwigo.py
+Usefull for your Piwigo gallery (http://www.piwigo.org/).
+./piwigo
+    ./photos
+        ./thumbnail/
+        ./pwg_high/
+            ./original_image01.jpg
+            .
+            .
+            ./original_imageN.jpg
+    ./piwigo.py
+Resize images from /pwg_high (original images) directory in two size :
+ - 128*128 pixels in ./piwigo/photos/thumbnail ;
+ - 1024*768 pixels in ./piwigo/photos/ .
+"""
+__author__ = "Cedric Bonhomme"
+__date__ = "$Date: 2009/03/22 $"
+__copyright__ = "Copyright (c) 2009 Cedric Bonhomme"
+__license__ = "GPL v3"
+import re import os import Image
+def search_files(motif, root_path):
+    """Return a list of tuple (path, files).
+    Search fo files containing 'motif' that
+    aren't symbolic links.
+    """
+    result = []
+    w = os.walk(root_path)
+    for (path, dirs, files) in w:
+        for f in files:
+            if re.compile(motif).search(f):
+                # if not a symbolic link
+                if not os.path.islink(os.path.join(path, f)):
+                    result.append((os.path.join(path, f), f))
+    return result
+images = search_files(".jpg", "./photos/pwg_high")
+for image in images:
+    im = Image.open(image[0])
+    im_thumbnail = im.resize((128, 128), Image.ANTIALIAS)
+    im_thumbnail.save("./photos/thumbnail/TN-" + image[1], quality = 100)
+    im_slide = im.resize((1024, 768), Image.NEAREST)
+    im_slide.save("./photos/" + image[1], quality = 100)
+""" Filter options to resize the image :
+    Use nearest neighbour :
+        Image.NEAREST
+    Linear interpolation in a 2x2 environment :
+        Image.BILINEAR
+    Cubic spline interpolation in a 4x4 environment :
+        Image.BICUBIC
+    Best down-sizing filter :
+        Image.ANTIALIAS
+"""
+</code>
+On peut facilement ajouter le transfert FTP du résultat dans le dossier distant qui va bien.
+====== Watermark avec ImageMagick ======
+<code bash>
+[cedric@localhost ~]$ convert 16-04-2008_0167.jpg -font Arial -pointsize 40 -draw "gravity south > fill black text 0,12 'Cédric Bonhomme' > fill white text 1,11 'Cédric Bonhomme' " wmark_text_drawn.jpg
+</code>
+====== Effet Polaroid ======
+<code bash>
+convert picture.jpg -thumbnail 240 -bordercolor white -background black +polaroid picture-pola.png
+</code>