Re: Fastest high-quality thumbnail display
Re: Fastest high-quality thumbnail display
- Subject: Re: Fastest high-quality thumbnail display
- From: James Merkel <email@hidden>
- Date: Sat, 30 Jul 2011 08:12:40 -0700
Thanks, I'll take a look at IK.
I also found an Apple example application called ImageApp. It seems to
work fine. No memory leaks.
The approach for using CIImage seems to be to draw directly to an
NSView rather than going to an NSImageView.
Jim Merkel
On Jul 29, 2011, at 11:46 PM, Scott Anguish wrote:
If you want to display many thumbnails (or images in general) why
not use the ImageKit?
It’s what it was designed for. Check out IK* files.
“The IKImageBrowserView class is a view for displaying and browsing
a large amount of images and movies efficiently.”
On Jul 25, 2011, at 3:04 PM, James Merkel wrote:
What is the fastest way to generate and display a thumbnail from a
digital camera file?
In the past I used NSImage -- however the quality (with JPEG files)
leaves something to be desired. Now I am using CIImage with Lanczos
scale transform -- quality is very good but it is slow
(particularly with raw files).
Should I be using the thumbnail capability of Image I/O? Will it
have as good a quality as CIImage, but be faster?
I am comparing the speed of my app (running in Xcode) with the
speed of Preview. Preview is much faster ( 2x or 3X). I wonder what
they are doing.
Of course the fastest way to display a thumbnail is to use the
thumbnail in the file (assuming there is one). But that's the
problem, there may not be a thumbnail in the file, in which case
you need to create one yourself.
Thanks for any help,
Jim Merkel
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