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post #1 of 9 (permalink) Old 10-02-2005, 03:11 AM Thread Starter
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jpeg to jpg

Have a question my digital camera when I transfer images to my computer converts them to jpeg which means that each picture is like 800k. How do I get numerous files all at once converted to jpg instead of doing each one separately?

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post #2 of 9 (permalink) Old 10-02-2005, 03:17 AM
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Re: jpeg to jpg

jpeg = jpg, same exact format I believe, if you want a smaller file size you'll need to resave the jpegs/jpgs with a lower quality setting, the one's right now are probably maxed out quality-wise.


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post #3 of 9 (permalink) Old 10-02-2005, 03:20 AM Thread Starter
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Re: jpeg to jpg

na its weird cuz i open up the picture in paint, save as jpg and the file goes down 500k

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post #4 of 9 (permalink) Old 10-02-2005, 03:26 AM
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Re: jpeg to jpg

Paint doesn't let you decide on a quality setting, I'm guessing they pick one themselves. If you use something like Photoshop (die Paint and it's non-non-antialising!) you'll get a lot more freedom on such matters. I'm almost completely positive that jpeg and jpg are the same, I just don't want to be an ass and put my money on it*


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post #5 of 9 (permalink) Old 10-02-2005, 12:57 PM
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Re: jpeg to jpg

Commie is right. JPEG is a compression algorythm that takes an image and tries to represent portions mathmatically, using sine waves. Because you're making a mathmatic approximation of an image, you can usually chose between different levels of approximation - a more lose approximation produces a smaller file size.

MS Paint uses the BLINDINGLY STUPID compression rate, and should no more be used for photo editing than you should take a paint brush to your hard drive.

If you want to change the compression or the picture size on a bunch of images at once, download Google's Picassa2. It's easy.

Note: you ever notice how there are sometimes ghost pixels around contrasty edges on low-quality JPEG images? That's all a function of sine waves, baby.
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post #6 of 9 (permalink) Old 10-02-2005, 02:21 PM
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Re: jpeg to jpg

Yep, jpeg (or jpg) is to pictures as mp3 is to music. They are lossy formats. Everytime your save a picture as a jpg your will lose data (ie the size and quality will be reduced). Everytime your resave the jpeg or mp3 you will lose quality, quality that you cannot get back. Thats is you alter a picture and want to save it as a jpg, you should always save it as a copy and not overwrite the original.

Once the original is overwritten you cannot get it back.

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post #7 of 9 (permalink) Old 10-04-2005, 07:50 PM
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Re: jpeg to jpg

And as everyone has said, JPG=JPEG. You're just talking about different compression levels.
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post #8 of 9 (permalink) Old 10-04-2005, 07:55 PM
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Re: jpeg to jpg

what you need to do is get a program like photoshop or macromedia fireworks and resave your images -- im guessing your camera saves large format pictures at about 72 DPI -- if it is saving them at 100 DPI you can resample to 72 and save lots of space on filesize -- also if it is saving large format pictures like 18"x18" then you can resample to like 10"x10" and cut the size by more than half. as for filenames they are both the same -- you can go and rename the files in windows if you want and just manually rename them -- the file will still be read the same.

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post #9 of 9 (permalink) Old 10-04-2005, 11:36 PM
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Re: jpeg to jpg

^^ Yeah you need better software...800k is tiny for a digital image these days.* but if you are just using paint it is going to save it at a lower quality, thus smaller file size.
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