Timeline for How and why does VueScan's TIFF and DNG output differ?
Current License: CC BY-SA 3.0
21 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 23, 2018 at 8:42 | vote | accept | starfry | ||
| Feb 28, 2018 at 17:44 | answer | added | starfry | timeline score: 3 | |
| Sep 23, 2016 at 13:07 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Aug 24, 2016 at 14:03 | comment | added | starfry | @chris the only vuescan-specific forum I was able to find was here but it's pretty dead. | |
| Aug 24, 2016 at 13:21 | history | tweeted | twitter.com/StackPhotos/status/768438160145674240 | ||
| Aug 24, 2016 at 13:21 | comment | added | Euri Pinhollow | Lightroom does not show you raw image, it shows you own interpretation of it. You should use a program like RawDigger to study the actual information. It is hard to say what is the difference without seeing the metadata of both files. It really looks like that the same data is saved to DNG which is not required to hold Bayer data. | |
| Aug 24, 2016 at 12:47 | comment | added | Chris | +1 for a VueScan tag, there are currently 41 questions about VueScan. Is there any official support channel for VueScan? | |
| Aug 24, 2016 at 12:20 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jul 25, 2016 at 11:23 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 25, 2016 at 11:03 | history | edited | starfry | CC BY-SA 3.0 |
Added sample images and histograms
|
| Jun 22, 2016 at 18:25 | comment | added | ths | The difference in lzw file sizes seems to show that lzw is just an inappropriate algorithm to compress the gammma corrected image data. The raw data is completely differently distributed of course (leaning to the left), which seems to be good for lzw. | |
| Jun 22, 2016 at 15:57 | history | edited | starfry | CC BY-SA 3.0 |
typo
|
| Jun 22, 2016 at 9:43 | comment | added | starfry | I've just discovered here that the gamma reported by imagemagick is the amount of correction it expects the display to do, not what's in the image. I've only started looking into this detail but I think perhaps gamma is a latent characteristic of the image data (i.e. because correcting the image alters its pixel values). | |
| Jun 19, 2016 at 14:56 | answer | added | Michael C | timeline score: 1 | |
| Jun 19, 2016 at 8:42 | comment | added | starfry | Just to add, my thinking at the minute is to archive the processed save file because I plan to profile my scanner (I just need to buy a target) and I think its worth archiving the image taking into consideration the scanner profile. Also, the reading I have done leads me to believe that VueScan's use of DNG is not in line with the format's intended purpose - i.e. to carry unprocessed camera raw data rather than scanner rgb | |
| Jun 19, 2016 at 8:37 | comment | added | starfry | Perhaps I worded it wrong but I meant it as one question because, I believe, VueScan's raw and its DNG implementation aren't necessarily the same as what one gets from camera raws. I asked specifically within the context of VueScan (had there been a VueScan tag I would have used it). Given VueScan's perhaps esoteric use of DNG I think the 'most appropriate format' is a factor of the format differences rather than subjective opinion. I've re-worded slightly. | |
| Jun 19, 2016 at 8:34 | history | edited | starfry | CC BY-SA 3.0 |
I reworded question summary so that it is one question.
|
| Jun 18, 2016 at 21:43 | comment | added | Olivier | Please ask only one question. | |
| Jun 18, 2016 at 21:36 | comment | added | Olivier | Related : Which is a better way to store your photos? RAW or TIFF?, What is a reasonable file format for film scanning? and Do I lose anything converting to DNG? | |
| Jun 18, 2016 at 19:12 | review | First posts | |||
| Jun 18, 2016 at 21:44 | |||||
| Jun 18, 2016 at 19:08 | history | asked | starfry | CC BY-SA 3.0 |