Re: Balancing image quality with file/download size
- "bob_in_minnesota" <installexpert@...> wrote:
>I just finished a set of 3 VR's done for a client. Using the same
> In putting together QTVR panos, I'm trying to achieve a good
> balance between image quality and file (download) size. It seems
> the main factors in play...
settings for all three produced very different file sizes, from 900K
to 1.8 meg. One of the key aspect of JPG compression is image
content. Complexity is the enemy of compression. A complex pattern
will significantly reduce compression effectiveness. This is why
nature scenes are so hard to compress; the real world is quite dirty
or filled with variation. It's another reason why CGI is still
typically so easy to spot - it's still too clean.
Given that, one additional ways to reduce file size is to use
different levels of compression on each cube face. Pano2QTVR allows
this. If you want to get extreme then use a graphic's program like
imageready or fireworks or others that allow you to mask the
compression. Then you can completely optimize the file size verses
Nothing is ever black or white, just so many shades of gray.