Python exam help - Revision history

Ssumathi: /* Exam answer */

2016-06-07T10:50:40Z

Exam answer

Ssumathi: /* Final result all in one file */

2016-05-26T14:48:33Z

Final result all in one file

@@ Line 244: / Line 244: @@
      fh.write("  </body>\n")
      fh.write("</html>\n")
 </source>

Ssumathi at 10:50, 26 May 2016

2016-05-26T10:50:26Z

@@ Line 178: / Line 178: @@
    </body>
 </html>
 </source>

Ssumathi: Created page with "==To get GPS coordinates and image orientation:== from exifread import process_file def degrees(j): return j.values[0].num + (j.values[1].num + j..."

2016-05-25T15:59:16Z

Created page with "==To get GPS coordinates and image orientation:== <source lang="python"> from exifread import process_file def degrees(j): return j.values[0].num + (j.values[1].num + j..."

New page

==To get GPS coordinates and image orientation:==

<source lang="python">
from exifread import process_file

def degrees(j):
return j.values[0].num + (j.values[1].num + j.values[2].den * 1.0 / j.values[2].num) / 60.0

tags = process_file(open("/home/sheela/Documents/Python/pics/IMG_20131019_201706.jpg"))
print tags
lat, lng = tags.get("GPS GPSLatitude"), tags.get("GPS GPSLongitude")
if lat and lng:
print "%.4f,%.4f" % (degrees(lat), degrees(lng)),

# Parse datetime of the photo
timestamp = tags.get("EXIF DateTimeOriginal")
if timestamp:
print timestamp.values,

# Parse image orientation
orientation = tags.get("Image Orientation")

if orientation:
j, = orientation.values
if j == 6:
print "rotated 270 degrees",
elif j == 8:
print "rotated 90 degrees",
elif j == 3:
print "rotated 180 degrees",

print
</source>

==This code is to remove the exif data - metadata==

<source lang="python">
import Image
from exifread import process_file

image_file = open('/home/sheela/Documents/Python/pics/IMG_20150619_120040.jpg')
image = Image.open(image_file)

# next 3 lines strip exif
data = list(image.getdata())
image_without_exif = Image.new(image.mode, image.size)
image_without_exif.putdata(data)

image_without_exif.save('without_exif_data.jpeg')
</source>

==This code is to rotate the picture (which do not have metadata) to original view==

<source lang="python">
import Image
orig = Image.open("original.jpg")
rotated = orig.transpose(Image.ROTATE_90) # This happens only in the RAM!
rotated.save("rotated.jpg")

</source>

<source lang="python">
import Image
from exifread import process_file

#input_path, output_path = sys.argv[1:]

image_file = open('/home/sheela/Documents/Python/pics/IMG_20131019_201706.jpg')
image = Image.open(image_file)

# next 3 lines strip exif
data = list(image.getdata())
image_without_exif = Image.new(image.mode, image.size)
image_without_exif.putdata(data)

image_without_exif.save('without_exif_data.jpeg')

im = Image.open("/home/sheela/Documents/Python/pics/IMG_20131019_201706.jpg")
rotated = im.transpose(Image.ROTATE_90)
im.save("rotated.jpg")

#orig = Image.open(output_path)
#rotated = orig.transpose(Image.ROTATE_90) # This happens only in the RAM!
#rotated.save(output_path)
</source>

==dexif.py Lauri's code==

<source lang="python">
import codecs, os, sys
from exifread import process_file
from PIL import Image
from jinja2 import Template

input_path, output_path = sys.argv[1:]
if not os.path.exists(output_path):
os.makedirs(os.path.join(output_path, "thumbnails"))
template = Template(codecs.open("gallery.html", "r", encoding="utf-8").read())
with codecs.open("/tmp/bulid/index.html", "w", encoding="utf-8") as fh:
fh.write(template.render(files = os.listdir(input_path)))

for filename in os.listdir(input_path):
if not filename.endswith(".jpg"): continue
print filename
tags = EXIF.process_file(open(os.path.join(input_path, filename)))
im = Image.open(os.path.join(input_path, filname))
rotated = im # Not roated at all
orientation = tags.get("Image orientation") # paese image orientation
if orientation:
j, = orientation.values
if j == 6:
rotated = im.transpose(Image.ROTATE_270)
elif j == 8:
rotated = im.transpose(Image.ROTATE_90)
elif j == 3:
rotated = im.transpose(Image.ROTATE_180)
rotated.save(os.path.join(output_path, filename))
rotated.thumbnail((192,192), Image.ANTIALIAS)
rotated.save(os.path.join(output_path, "thumbnails", filename))

</source>

==Artur code A.py==

<source lang="python">
import Image
import sys
from exifread import process_file

input_path, output_path = sys.argv[1:]

image_file = open(input_path)
image = Image.open(image_file)

data = list(image.getdata())
no_exif = Image.new(image.mode, image.size)
no_exif.putdata(data)

no_exif.save(output_path)

orig = Image.open(output_path)
rotated = orig.transpose(Image.ROTATE_90) # This happens only in the RAM!
rotated.save(output_path)

</source>

==To get image thumbnail==

<source lang="python">
<<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Images</title>
<style>
body {
background-color: #444;
}

.thumbnail {
position: relative;
display: inline;
margin: 1em;
padding: 0;
width: 192;
height: 192;
box-shadow: 0px 0px 10px rgba(0,0,0,1);
}
</style>
</head>
<body>
{% for filename in files %
<a href= "{{filename}}">
<img class="thumbnail" src="thumbnails/{{filename}}"/>
</a>
{% endfor %}
</body>
</html>
</source>