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05/03/2006 03:47:59 PM · #26 |
| AFAIK the TIFF format only uses the LZW algorithm for compression, and it is lossless -- essentially the same as is used for the ZIP archive format. I've never heard of a TIFF using lossy compression. |
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05/03/2006 03:50:09 PM · #27 |
| Does PNG support layers and 16 bits/channel? |
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05/03/2006 03:51:12 PM · #28 |
Originally posted by David.C:
PNG is not a do it all format, but it does provide many benefits over JPG, TIFF or GIF -- benefits that will only become more useful as PNG acceptance increases. |
You're right that PNG has many benefits over JPGF, TIFF, and GIF. But what benefit does it have for photos? PNG wasn't designed for photos and doesn't do a very good job with them.
You said JPEG "compresses better so it allows more to fit on the card." Exactly. The fact that it "compresses better" also means you get better image quality for the same file size (e.g., for a 150k image on DPC).
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05/03/2006 03:57:35 PM · #29 |
Originally posted by cpanaioti:
Does PNG support layers and 16 bits/channel? |
Layers no, 16-bit yes.
Edit to just answer the question.
Message edited by author 2006-05-03 16:04:44.
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05/03/2006 04:05:41 PM · #30 |
| AFAIK png does actually support layers (it's the native format of Macromedia Fireworks and it saves layers) and I just did a google search and it can save 16 bits per channel. |
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05/03/2006 04:15:01 PM · #31 |
Originally posted by fotomann_forever:
Originally posted by jent:
My bad...but I still think this is a path that should be considered. |
If this site were geared more toward rasterized vector graphics, I'd agree that PNG would be a valuable choice. I don't see it as adding much value to a site geared toward photos. |
You aren't thinking long term. Digital/photographic art is here to stay and in 5-10 years will look more like vector graphics. Mark my words!!!! :P
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05/03/2006 06:16:54 PM · #32 |
Originally posted by yanko:
Originally posted by fotomann_forever:
Originally posted by jent:
My bad...but I still think this is a path that should be considered. |
If this site were geared more toward rasterized vector graphics, I'd agree that PNG would be a valuable choice. I don't see it as adding much value to a site geared toward photos. |
You aren't thinking long term. Digital/photographic art is here to stay and in 5-10 years will look more like vector graphics. Mark my words!!!! :P |
this is a great point. And in addition what is bad about having extra choices? I personaly don't want to see anyone forced into anything, and there would not have to be any changes in the rules (so the filesize still has to be in the same range).
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05/03/2006 07:05:15 PM · #33 |
Originally posted by fotomann_forever:
Originally posted by cpanaioti:
Does PNG support layers and 16 bits/channel? |
Layers no, 16-bit yes.
Edit to just answer the question. |
Without layers, it's not much good as an intermediate file format. |
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05/03/2006 07:06:28 PM · #34 |
Originally posted by cpanaioti:
Originally posted by fotomann_forever:
Originally posted by cpanaioti:
Does PNG support layers and 16 bits/channel? |
Layers no, 16-bit yes.
Edit to just answer the question. |
Without layers, it's not much good as an intermediate file format. |
It does do layers. |
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05/03/2006 07:08:29 PM · #35 |
Originally posted by Megatherian:
Originally posted by cpanaioti:
Originally posted by fotomann_forever:
Originally posted by cpanaioti:
Does PNG support layers and 16 bits/channel? |
Layers no, 16-bit yes.
Edit to just answer the question. |
Without layers, it's not much good as an intermediate file format. |
It does do layers. |
Talk to the cheeseman, he's the one that said there weren't. ;o)
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05/03/2006 07:26:30 PM · #36 |
Originally posted by kirbic:
Are you confusing JPG with GIF? The GIF format is what the PNG format was designed to replace, after the IP owner of the GIF format (Compuserve) started to make noise about royalties. AFAIK, there is no such issue with JPG.
FWIW, the GIF and PNG formats are both optimized for non-photographic images, whereas JPG is optimized for photographic image storage. |
EUOA violation. ;-) |
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05/03/2006 07:30:56 PM · #37 |
Originally posted by Megatherian:
Originally posted by cpanaioti:
Originally posted by fotomann_forever:
Originally posted by cpanaioti:
Does PNG support layers and 16 bits/channel? |
Layers no, 16-bit yes.
Edit to just answer the question. |
Without layers, it's not much good as an intermediate file format. |
It does do layers. |
Well, if it does Photoshop CS2 certainly didn't recognize them in my test. Maybe Gimp does.
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05/03/2006 07:34:02 PM · #38 |
| Macromedia Fireworks saves everything as PNG and includes layers. |
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05/03/2006 07:50:35 PM · #39 |
Interesting. I appear to have been mislead about PNG being no loss/better compression then JPG.
Thanks for the information. (Although, admittedly, I could have gone to Wikipedia and found that myself.) |
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