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Lossless compressed
Nov 15, 2019 19:44:34 #
The other day I shot some bird photos with my D810 set to 14bit and uncompressed and it produced shots at 71 to73MB. I've reset it to lossless compressed. Now a couple of years ago I shot a Ring-neck Pheasant that was front lighted under a cloudless sky and was standing on snow. That D800 was set to 14bit and lossless compression and produced a file size of 51.25 MB. Isn't the Pheasant shot a product of excellent lighting? Would the D810 shots at 71 to 73MB be also effected by good lighting to build better resolution in good lighting? I'm getting lost here>
Nov 15, 2019 19:58:22 #
Not sure what you are asking, but if it is regarding the file size difference, the busier (more complicated) and more colorful an image is, the larger the file will be as there is more data to store regarding all the pixel differences. if you took a picture of a polar bear in a snow storm and only his nose was showing, that file would be much smaller because it would be almost all one color and little detail.
Nov 15, 2019 19:59:34 #
Longshadow wrote:
Not sure what you are asking, but if it is regarding the file size difference, the busier (more complicated) and more colorful an image is, the larger the file will be as there is more data to store regarding all the pixel differences. if you took a picture of a polar bear in a snow storm and only his nose was showing, that file would be much smaller because it would be almost all one color and little detail.
Gotta love the bear nose example!!!!
Nov 15, 2019 20:00:13 #
Ysarex
Loc: St. Louis
Larryshuman wrote:
The other day I shot some bird photos with my D810... (show quote)
As I understand it with the D810 lossless compression is indeed lossless. How small the final file size ends up shouldn't be related to lighting. Lossless compression is achieved by removal of data redundancy. The image content may influence the compression rate.
Joe
Nov 15, 2019 20:01:14 #
Nov 15, 2019 20:02:28 #
Larryshuman wrote:
The other day I shot some bird photos with my D810... (show quote)
Lossless Compressed – as the name implies, lossless compression means that a RAW file is compressed like an archive file without any loss of data. Once a losslessly compressed image is processed by post-processing software, the data is first decompressed, similar to what happens to archived data contained in a ZIP file. Lossless compression is the ideal choice, because all the data is fully preserved and yet the image takes up much less space.
https://photographylife.com/compressed-vs-uncompressed-vs-lossless-compressed-raw
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Nov 15, 2019 20:07:57 #
Ysarex wrote:
As I understand it with the D810 lossless compression is indeed lossless. How small the final file size ends up shouldn't be related to lighting. Lossless compression is achieved by removal of data redundancy. The image content may influence the compression rate.
Joe
Joe
Definitely!
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Nov 16, 2019 07:16:43 #
Nov 16, 2019 11:42:05 #
Longshadow wrote:
Not sure what you are asking, but if it is regarding the file size difference, the busier (more complicated) and more colorful an image is, the larger the file will be as there is more data to store regarding all the pixel differences. if you took a picture of a polar bear in a snow storm and only his nose was showing, that file would be much smaller because it would be almost all one color and little detail.
Nov 16, 2019 16:35:14 #
Longshadow wrote:
Not sure what you are asking, but if it is regarding the file size difference, the busier (more complicated) and more colorful an image is, the larger the file will be as there is more data to store regarding all the pixel differences. if you took a picture of a polar bear in a snow storm and only his nose was showing, that file would be much smaller because it would be almost all one color and little detail.
That is not entirely correct because there are graduations in the snow. Because the snow is not all the exact same color. But that is the basic principal of compression.
Nov 16, 2019 16:42:54 #
Larryshuman wrote:
The other day I shot some bird photos with my D810... (show quote)
Lossless compressed files when de-compressed will (theoretically) result in the exact same image as uncompressed files. The only difference is file size.
I have a recommendation. Do some experiments. Shoot the same scene(s) using compressed and uncompressed formats, and then compare them and you will have your answer.
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Nov 16, 2019 17:39:11 #
JD750 wrote:
That is not entirely correct because there are graduations in the snow. Because the snow is not all the exact same color. But that is the basic principal of compression.
Correct, not EXACTLY 100% all of the snow will be the exact same color BUT, you get my drift.
Why nit-pick about minute details in the snow?
Don't forget about any difference that would be added by any snow that may be glistening, or shadows caused by mounds of snow, fences, rocks, dead animals, etcetera.
Yes, if there is a .05% difference in various areas of the snow, that will affect the file size.
But I guess it is that important to mention.
Nov 16, 2019 17:39:25 #
The eight hundred pound gorilla in the room is the issue of CPU cycles...
Uncompressed allows for a higher frame rate provided the buffer doesn't choke...
An extra frame or two can make a world of difference for sports action...
Also it is silly to worry about file size since there are so many variables in the mix...
Should the sun go behind a cloud your file size can change dramatic for an identical image...
12-bit uncompressed with likely yield the highest frame rate... those who claim they can see the difference between 12 and 14bit are likely only looking in the shadows at 500% magnification...
Uncompressed allows for a higher frame rate provided the buffer doesn't choke...
An extra frame or two can make a world of difference for sports action...
Also it is silly to worry about file size since there are so many variables in the mix...
Should the sun go behind a cloud your file size can change dramatic for an identical image...
12-bit uncompressed with likely yield the highest frame rate... those who claim they can see the difference between 12 and 14bit are likely only looking in the shadows at 500% magnification...
Nov 16, 2019 17:43:52 #
Thomas902 wrote:
The eight hundred pound gorilla in the room is the... (show quote)
(Interesting side note.
Not much to do with the original question,
but an interesting side note.)
Nov 16, 2019 23:42:18 #
Out of curiosity, will the lossless compression result in an increase in noise? When I recently changed from volleyball to basketball shots, I changed to lossless compression (for the increase in frame rate). But I have noticed an increase in noise with the BB shots and I'm just wondering if the compression could create more noise. I do not remember having as much noise in the volleyball shots.
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