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| Thread ID: 47610 | 2004-07-31 07:44:00 | Jpeg2000, Lossless Jpeg | Steve_L (763) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 256939 | 2004-07-31 07:44:00 | Using Photoshop and IrfanView, "Save As", I notice an option to save as Jpeg2000. I have also heard of 'lossless jpegs' - is this the same as Jpeg2000? Altering normal jpegs can cause degradation of the photo, I believe after 4 or 5 alterations. If I were to use jpeg2000, would there be no such degradation? If I save a photo as jpeg2000, and either email it or take it to a photo shop to be printed, or make it part of a web page, would it be as acceptable as a normal jpeg? Thanks. |
Steve_L (763) | ||
| 256940 | 2004-07-31 07:56:00 | There are several different versions of lossless jpeg's, some require copyrights or software that has the copyright to use it, I'm not sure about opening them, I imagine not. It's better to work on the files in PSD or some other lossless format then save them as jpegs for posting, sending, etc. Jpegs start getting artifacts, etc, as soon as you save them, depending on the resolution it may take four or five saves to notice it but if you want to blow the image up you will see it straight away. Cheers Murray P |
Murray P (44) | ||
| 256941 | 2004-07-31 11:07:00 | Try PNG format, that is the 3rd most popular web site picture format. so email receives should be able to display it. | Earnie Moore (5918) | ||
| 256942 | 2004-07-31 20:38:00 | Earnie, what is the advantage of using PNG? | Steve_L (763) | ||
| 256943 | 2004-07-31 22:01:00 | > Earnie, what is the advantage of using PNG? It's compressable, high res, and lossless. It's also free. Mike. |
Mike (15) | ||
| 256944 | 2004-07-31 22:23:00 | > > Earnie, what is the advantage of using PNG? > > It's compressable, high res, and lossless . It's also > free . > > Mike . And that is not the only reasons, I suggested it because, if someone sent anyone a PNG file it would be very strange if they were not able to display the picture . I get sick of these people who think that just because they have a "Microsoft Word" or office program, they think everyone else has office or word as well and should be able to display there DOC file without problems . |
Earnie Moore (5918) | ||
| 256945 | 2004-07-31 22:35:00 | Hi, guys - I tried Earnie's advice. The trade off appears to be a file size that is 6 times the .jpg file size. KB. | kbcad (1025) | ||
| 256946 | 2004-08-01 04:24:00 | PNG is intended as a licence free replacement for the GIF format. GIF and PNG are at their best on "line art" type pictures, where there are areas of the "same" colour which are easily compressed. Continuous tone art (photographs) will give terrible results in GIF or PNG. JPEG and other photographic formats will always be better for that. | Graham L (2) | ||
| 256947 | 2004-08-05 07:28:00 | > Hi, guys - I tried Earnie's advice. The trade off > appears to be a file size that is 6 times the .jpg > file size. KB. Yes & no, this is not always the case, By the way JPG is no good on straight lines, it looks like some kind of smuging |
Earnie Moore (5918) | ||
| 256948 | 2004-08-05 12:13:00 | it usually helps to index your png's, so there is less colours. | mejobloggs (264) | ||
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