StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
4001796
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2010-10-23T00:14:27.240
FavoriteCount
0
LastActivityDate
2010-10-24T02:11:45.677
LastEditDate
2010-10-24T02:11:45.677
LastEditorUserId
62488
OwnerUserId
386182
ParentId
4001719
PostTypeId
2
Score
15
ViewCount
0
LastEditorDisplayName
text
Body
I don't know about ALL JPEG files, but you will need to handle the two common file formats for JPEG. Since JPEG is a compression method and not a file format, the world at large has developed a few ways of storing JPEG image data in files. The two you are most likely to encounter are JFIF and EXIF. The above code covers JFIF, but doesn't handle EXIF. These two are largely incompatible but both are JPEG, so you'll need to detect and handle if you are using header information, as they defer. For resolution, as an example. EXIF's field are x-Resolution and y-Resolution, vs the X/Y Density approach. I would: <ol> <li>Do some reading on the two formats (JFIF and EXIF). I find Wikipedia is a great place to start on this reference (for some past projects I've done), but SO most likely has some great info on this topic as well. JFIF: <a href="http://en.wikipedia.org/wiki/JPEG_File_Interchange_Format" rel="noreferrer">http://en.wikipedia.org/wiki/JPEG_File_Interchange_Format</a> EXIF: <a href="http://en.wikipedia.org/wiki/Exif" rel="noreferrer">http://en.wikipedia.org/wiki/Exif</a></li> <li>Write code to detect the format using the starting headers</li> <li>Handle each format independently</li> <li>Wrap the whole thing so you can just toss a JPEG at it and get the density. This will also give you a great spot to toss other helper code to deals with the "fun" world of JPEG handling</li> </ol>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POGetting JPEG resolution without decoding the image
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USGregor Brandt
UserOwnerUserId
1. USTaylor Bird
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
3. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.