Film-Tech Forum ARCHIVE: Removing a *.PNG file

This is topic Removing a *.PNG file in forum Film-Yak at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=8;t=001216

Posted by Barry Floyd (Member # 385) on 09-03-2002, 12:53 PM:

A friend of mine sent me a file attached to an email with a ".png" extension, but now my computer will not let me delete it. I've tried Windows Explorer.. won't work, deleted the entire folder it's in to the Recycle Bin, but when emptying the Recycle Bin, it still won't delete that file. I've even tried to go thru DOS and delete it, but it tells me "access is denied". What gives with this file?

I've run Norton Anti-Virus on it to see if it might be a virus file, but it reports nothing?

Any help would be appreciated.....

------------------
Barry Floyd
Floyd Entertainment Group
Lebanon, Tennessee

Stardust Drive-In Theatre
Watertown, Tennessee

Posted by Sam Hunter (Member # 1119) on 09-03-2002, 01:40 PM:

Boot your PC up with a startup disk and then delete the file.

------------------
Samual Hunter Sr.

KC5ZSL

Posted by Barry Floyd (Member # 385) on 09-03-2002, 01:48 PM:

Did some searching, and found "www.annoyance.org" or something like that, where they bash Windows 98 as much as you guys bash technicolor.

Anyway, I had to "clear" the file from showing up in my Taskbar - in the recent documents folder, then once it was clear, it deleted with no problem.

Thanks anyway Sam...

Posted by Randy Stankey (Member # 64) on 09-03-2002, 02:39 PM:

A "ping" file (.png) is similar to a .gif. It is used under the same conditions/constraints as a .gif. If memory serves it stands for "Packaged Network Graphics".

Two reasons to use it:

It's not patented. The GIF format is "owned" by Compuserve (or whoever owns Compuserve now). They demand their royalties from everyone who wants to write an application that uses it. Ping is royalty free.
Ping is better than GIF. Depending on the circumstances, ping files will be as much as 20-30% smaller than GIF. Ping compression is considered a lossless form of compression, depending on the paramerter settings at the time the file is originally written.

Some browsers don't read pings, or you may need a plug-in or something, I'm not sure. I haven't had a problem reading any .png files.

QuickTime will read pings. You can download that free from Apple.com

Posted by Bobby Henderson (Member # 840) on 09-03-2002, 05:05 PM:

Using both Adobe Photoshop and Macromedia Fireworks MX, I haven't seen much file size savings at all in using PNG. For bitmap logo art with flat color, I do just as well in using an indexed GIF --or better yet, a vector-based Flash SWF image. Compression/quality levels for PNG on full color photo images is usually unacceptable for the large resulting file sizes. I prefer to go with JPEG instead.

Once broadband Internet access becomes truly commonplace (instead of the current reality where only 10% to 20% of users at best have any high speed access) then the PNG format can become more accepted.

One thing I do like about PNG is the ability to use alpha channels for transparancy effects. It makes the format work a lot like TIFF.

Posted by Randy Stankey (Member # 64) on 09-04-2002, 08:22 PM:

PNG is simply another (royalty free) form of GIF. Thus, it isn't fit for full color images the way JPEG is. It's still better to use JPEG for pictures.

If you want to take full advantage of PNG's better file size/compression you need to fiddle with the dithering and compression parameters. This depends on the program you use to write the file with in the first place. I use Photoshop Elements. It has a settings panel for saving different formats.

I don't really know much more than that. I don't do a lot of saving or original graphics work anymore. It's been a while since I actually farted around with the settings and compared results.