Storing Files in the Cloud is Resulting in Sharpness Degredation
Jan 28, 2020 00:16:52 #
TriX wrote:
Off the OP’s subject. But HD cluster size is always a compromise. Ideally, you align your writes with the cluster size to minimize wasted space, but if not feasible, smaller clusters potentially have less wasted space, but result in lower performance for large files such as images.
Yes, but in dealing with images, they have a certain size. And if that size spills over into the last cluster needed to complete that image. whatever is not used is wasted.
In the case of the cloud, they store a lot of data, so smaller clusters at the cost of lower performance would be preferable. For those wondering why, every new cluster used require a memory access to go to that cluster. This is more of a penalty for a spinning drive than it is for an SD card.
Everyone's cameras, with their SD cards, are not so flexible in that the camera is fixated on a set size. For a 32GB card, that would be FAT32. For a 64GB card, FAT32 is no longer usable, but I forgot the name beyond 32G. I brought those up because most users know a little about their memory cards and next to nothing about the structure of their hard drives.
Jan 28, 2020 00:29:02 #
rgrenaderphoto wrote:
Your internet connection is the issue, the low speed is introducing transmission errors. Load the Speedtest app onto your Smartphone and see if the Upload/Download speeds are what you are paying for. In this instance, the upload speed is the governing factor.
Explain how an Internet connection can degrade image quality.
Mike
Jan 28, 2020 00:30:39 #
Hamltnblue wrote:
I'm sure the files are compressed during transmission and storage. Maybe some data is being lost when compressing already compressed files
I think it is probably just the display, the actual file is not changed. The exact same thing happens here at UHH. That is easily checked - download the images rather than just viewing the thumbnails.
Mike
Jan 28, 2020 00:31:47 #
Wanderer2 wrote:
No way is it my imagination!
Of course it is not your imagination.
Mike
Jan 28, 2020 06:08:10 #
My understanding , for what it’s worth is that every time you save a JPEG the compression effects the photo.
I have assumed that you are saving JPEGs. This compression process will even cause artefacts to appear.
I have assumed that you are saving JPEGs. This compression process will even cause artefacts to appear.
Jan 28, 2020 06:43:07 #
Wanderer2
Loc: Colorado Rocky Mountains
Hammer wrote:
My understanding , for what it’s worth is that every time you save a JPEG the compression effects the photo.
I have assumed that you are saving JPEGs. This compression process will even cause artefacts to appear.
I have assumed that you are saving JPEGs. This compression process will even cause artefacts to appear.
No, as I described earlier, I'm saving only DNG and TIFF raw files in the cloud. I save JPEGs only in an external hard drive back up.
Jan 28, 2020 07:55:16 #
RDBDDS
Loc: Eatonton, GA
If you are getting free unlimited storage the resolution is being considerably downgraded.
Jan 28, 2020 08:01:03 #
RDBDDS wrote:
If you are getting free unlimited storage the resolution is being considerably downgraded.
That can't be arbitrarily stated!!!
Not all sites MAY downgrade the resolution!
Jan 28, 2020 08:05:28 #
RDBDDS
Loc: Eatonton, GA
I received a notice from them and was told I had to pay or they could downgrade and the pictures would be fine for Facebook, etc. and there would be no charge.
Jan 28, 2020 08:08:06 #
RDBDDS wrote:
I received a notice from them and was told I had to pay or they could downgrade and the pictures would be fine for Facebook, etc. and there would be no charge.
THAT company...
As with anything, check before you use it.
Jan 28, 2020 08:32:25 #
Jaackil
Loc: Massachusetts
Wanderer2 wrote:
Thanks for the very quick reply. br br I had uplo... (show quote)
Question for you. Are you refering to the rendered image viewed in amazon photos? Or are you talking about uploading an image then downloading it and viewing it again?
Jan 28, 2020 08:44:34 #
Jaackil
Loc: Massachusetts
Longshadow wrote:
That can't be arbitrarily stated!!!
Not all sites MAY downgrade the resolution!
Not all sites MAY downgrade the resolution!
Amazon stores the original file as uploaded but they may downgrade the resolution for display. What you see when you view it from the cloud/amazon photos may be a lower resolution. But if you download it will be the same resolution as uploaded. Amazon is not a proffesional photography site like say Zenfolio or some of the others. They do not claim as far as I know to display full resolution. They only claim to optimize for viewing which means speed of rendering. The give you the best resolution that will load quickly. They only claim to store full resolution. If you upload raw files they do not render those thumb nails all that well either however the downloads are lossless
Jan 28, 2020 08:55:05 #
RDBDDS wrote:
I received a notice from them and was told I had to pay or they could downgrade and the pictures would be fine for Facebook, etc. and there would be no charge.
Are you talking about Amazon?
Jan 28, 2020 09:03:25 #
Jaackil
Loc: Massachusetts
Wanderer2 wrote:
No, as I described earlier, I'm saving only DNG and TIFF raw files in the cloud. I save JPEGs only in an external hard drive back up.
That is your issue right there. Raw files are not actual images. They have to be converted to jpg to be viewed. Even on your own computer you are only viewing a thumbnail. What you see when you view them on Amazon is just Amazons thumbnail rendering. There has been no downgrade of the actual file. Lightroom does the exact same thing when you are viewing a raw file. You are actually viewing a thumbnail not the actual raw data. Lightroom or any raw editor allows you to then see the manipulated raw file. Amazon is just showing you a jpg of the raw file. The very simple test for this is download an image from Amazon and compare it to the original they should be the same. My experience is they are. I store raw images to amazon also.
It is really hard to share raw images also because different platforms render them differently. Also keep in mind if you edit a raw image in Lightroom let’s say and then share the raw image without converting it to a jpg the person on the other end gets the raw unedited file because your edits are all in the catalog they don’t go with the image. Programs like lightroom never actually change the raw file. If you want to use Amazon for sharing it’s best to use Jpg files.
Jan 28, 2020 09:37:12 #
I was under the impression that large files were reduced in size - and resolution.
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