[ 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: 12345678910 ]

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

Date Posted: 01:40:27 02/15/06 Wed
Author: Richard Luteijn
Subject: JPEG SaveQuality and Changed FileSize

Hi there,

How can i load an image from a file (any type), then display the original image plus an image to reflect a changed SaveQuality. This gives the user the ability to choose (visually) the best Quality.

I've tried loading an image in a TImageScrollBox, Saving that image to a TStream, then loading the Stream into a TJpegGraphic and setting the SaveQuality (to 10). After that i save the TJpegGraphic to a Stream and load that Stream into another TImageScrollBox.
The second image is not compressed however. When Saving the First and Second image to file, the filesizes are the same. The filesize of the TJpegGraphic is a lot smaller.
Does savequality not work when saving to a Stream ?

Originally, i tried an Assign version (similar steps, but using Assign instead of a Stream) but got no picture at all.


Also, after Loading a JPG from file and immediately saving it, the JPG filesize is a lot smaller. Why ?

Thanks for any help,

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

Post a message:
This forum requires an account to post.
[ Create Account ]
[ Login ]
[ 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.