Sharpness of photos

[marion44]

Hello everyone !
I just come to understand something I really don't understand by myself !
When I open my photos with Photoshop they're much sharper than the original file, which is quite nice ! But WHY ??? I thought it could be a question of JPEG thing or so, but if my original file is a JPEG, can it be improved just by opening it in Photoshop ? Or is it due to the quality of the Microsoft pic viewer ?
If you have the answer, I'll be very glad to understand this magical fact !
Thanks a lot,
Marion

[Didi]

Bonjour Marion
L'éditeur d'images Microsoft viewer n'est pas de bonne qualité, je ne m'en sers jamais.
Tu peux faire l'expérience avec Photofiltre Logiciel de traitement d'image qui est moins important que Photoshop et tu auras quand même des images de bonne qualité.
Cordialement

[marion44]

Merci :) Marion

[Nelu_Goia]

Hi Marion,
It depends...
When you have a very large photo and you try to look at it with Windows Picture and Fax Viewer, it will not be viewed at 100%.This is the reason for the image looks softer this way.
If the image has the screen`s size and you watch it at 100% it will look OK.
It is the same in Photoshop,too.The best size to view the photos are 100%,50% and 25%.Never use 66% or 33%.
Also,when sharpening, you have to be at 100% or eventually,50%,for very large photos.
There is no magic in this whole thing.
Cheers:)
Nelu