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PO
primarykey
Id
3175473
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2010-07-04T17:01:48.410
FavoriteCount
0
LastActivityDate
2016-01-08T00:19:53.353
LastEditDate
2016-01-08T00:19:53.353
LastEditorUserId
4175524
OwnerUserId
104446
ParentId
1507084
PostTypeId
2
Score
14
ViewCount
0
LastEditorDisplayName
text
Body
<p>If you don't need the rest of PIL and just want image dimensions of PNG, JPEG and GIF then this small function (BSD license) does the job nicely:</p> <p><a href="http://code.google.com/p/bfg-pages/source/browse/trunk/pages/getimageinfo.py" rel="nofollow noreferrer">http://code.google.com/p/bfg-pages/source/browse/trunk/pages/getimageinfo.py</a></p> <pre><code>import StringIO import struct def getImageInfo(data): data = str(data) size = len(data) height = -1 width = -1 content_type = '' # handle GIFs if (size >= 10) and data[:6] in ('GIF87a', 'GIF89a'): # Check to see if content_type is correct content_type = 'image/gif' w, h = struct.unpack("<HH", data[6:10]) width = int(w) height = int(h) # See PNG 2. Edition spec (http://www.w3.org/TR/PNG/) # Bytes 0-7 are below, 4-byte chunk length, then 'IHDR' # and finally the 4-byte width, height elif ((size >= 24) and data.startswith('\211PNG\r\n\032\n') and (data[12:16] == 'IHDR')): content_type = 'image/png' w, h = struct.unpack(">LL", data[16:24]) width = int(w) height = int(h) # Maybe this is for an older PNG version. elif (size >= 16) and data.startswith('\211PNG\r\n\032\n'): # Check to see if we have the right content type content_type = 'image/png' w, h = struct.unpack(">LL", data[8:16]) width = int(w) height = int(h) # handle JPEGs elif (size >= 2) and data.startswith('\377\330'): content_type = 'image/jpeg' jpeg = StringIO.StringIO(data) jpeg.read(2) b = jpeg.read(1) try: while (b and ord(b) != 0xDA): while (ord(b) != 0xFF): b = jpeg.read(1) while (ord(b) == 0xFF): b = jpeg.read(1) if (ord(b) >= 0xC0 and ord(b) <= 0xC3): jpeg.read(3) h, w = struct.unpack(">HH", jpeg.read(4)) break else: jpeg.read(int(struct.unpack(">H", jpeg.read(2))[0])-2) b = jpeg.read(1) width = int(w) height = int(h) except struct.error: pass except ValueError: pass return content_type, width, height </code></pre>
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1. POHow to check dimensions of all images in a directory using python?
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1. USJohnTESlade
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