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05-17-2010   1 links from elsewhere to this Post. Click to view. #1 (permalink)
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Default Fake .jpg?

say u want to upload a picture and the place where u want to upload it doesnt take any other formats other than .jpg?
but u want to upload a .png because it can handle transparecy and .jpg cant.
could hex editor be used? to make that .png appear as a .jpg? and the place that accepts the .jpg will accept the .png that was made to appear as a .jpg?

so confusing.... >_<
 
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05-17-2010   #2 (permalink)
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It won't work, even if the image opens it will read the file header telling it that it is a png so it won't open.
Even if you manage to open it the jpeg decoder itself won't be able to decode the transparent portions which will make everything pointless.

If you're able to link the image you can upload it to a image host and link it from there.
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05-17-2010   #3 (permalink)
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what is this?

<- fake .jpg

Last edited by CrunchyRoll; 05-17-2010 at 07:58 PM.
 
05-17-2010   #4 (permalink)
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file header
i can't remember the length, i think it is 32 bytes
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05-17-2010   #5 (permalink)
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what is a file header? 32 bytes?
 
05-18-2010   #6 (permalink)
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http://en.wikipedia.org/wiki/Header_(computing)
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05-18-2010   #7 (permalink)
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@kag hmm so it is possible to trick the uploader? png is the actual file and it appears as .jpg. and the uploader won't detect anything. or does tlunia have an option and they can upload .png for guild emblems?(i dont think so though)

wiki's explanation is hard to understand because i do not know much of computers

what program would i have to use to do this?
 
05-18-2010   #8 (permalink)
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never really seen a guild emblem with transparency.

Actually the best way would be to rename the extension from jpg to png
Cause most uploader detects just the extensions.
Changing the header to jpg would be allowing the image to go through and hopefully the image will be decoded as png

Or try double extensions
image.jpg.png
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05-18-2010   #9 (permalink)
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Quote:
Originally Posted by kag
never really seen a guild emblem with transparency.

Actually the best way would be to rename the extension from jpg to png
Cause most uploader detects just the extensions.
Changing the header to jpg would be allowing the image to go through and hopefully the image will be decoded as png

Or try double extensions
image.jpg.png
/forum/lunia-guides/...ml#post1236001

KURAN guild their emblem has transparency.
<-got file from C:\Chinesegamer\LuniaTW\GuildMark\41433.jpg
i think that they used the changing the header method. wouldnt the original emblem have to be png for transparency becuase jpg does not support it.

Last edited by CrunchyRoll; 05-18-2010 at 09:29 PM.
 
05-19-2010   #10 (permalink)
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Quote:
Originally Posted by http://www.talkgraphics.com/showthread.php?t=22385&page=2
Originally Posted by martin_DTP
Hi
You can insert jpg picture without backgroud. You must:
I. In Photoshop:
1. Create path by "pen tool".
2. Copy this path by "path selection tool".
II. In Illustrator:
1. Place jpg picture.
2. Paste path by CTRL C (PC) or cmd C (Mac).
3. Select picture and path by selection tool.
4. Create clipping mask (cmd 7 or menu/object/clipping mask/make)
5. In this way you will get jpg without background.
Alternatively - you can just do this in Illustrator rather than copying the path from PS. Just draw your path and make sure it is above the photo then grab both the photo and the path and do Ctrl+7 to make a clipping mask.
i've never really uploaded any guild pics, might try tomorrow if i have time T_T
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05-19-2010   #11 (permalink)
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^ will that way work? tell me if it does. and how exactly can i change the header. couldnt find out how to...
 

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