VoyForums
[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

[ Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, 3, [4], 5, 6, 7, 8, 9, 10 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 17:31:16 02/05/03 Wed
Author: Michel
Subject: Re: regarding compression
In reply to: lakshmi 's message, "regarding compression" on 00:20:53 02/04/03 Tue


Hi,

I an not a compression expert, but jpeg does not use wavelets, it uses something called dct, discreet cosine tranform if I remember correctly.

Everytime you save as a jpeg you lose image quality, hence the reduction in size even if you later save as another format.

Hope this helps,

Michel

>hello i have a doubt regarding compression of image
>files as iam doing a project in image compression .
>
>when jpeg files are saved i know they follow wavelet
>compression .
>
>the question is "i started with a jpeg file of size
>680 kb and saved the jpeg files as bmp, again the same
>bmp file i saved as jpeg the size of the new jpeg file
>was 68 kb " this process itself achieves some amount
>of compression .can you tell me what is the internal
>storage techniques of jpeg and other formats in detail

[ Next Thread | Previous Thread | Next Message | Previous Message ]
[ Contact Forum Admin ]

Forum timezone: GMT-5
VF Version: 3.00b, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.