File copy is a lossless operation. Disks usually hace CRC checks in place to detect if a sector is corrupted but the act of copying is a 1:1 bit copy, so each copy is exactly identical to the previous.
The loss of quality occurs on compression when a file is written from image-data, JPEG encoding discards some information, and even so JPEG supports certain ...
As others have said, the areas in question have lost most of their data, so there is no way to recovery what has been lost.
The only way to repair the image at this stage is to recreate the data either from the start (i.e. take the photo again), or approximate what should be their using the surrounding data as a reference. The former is not possible in ...
In Adobe Photoshop, you can use this plugin from Exchange:
As already established, export as sRGB - whether or not you embed the profile is really moot, as with no profile, sRGB will be assumed.
Prior to that work in whatever you got from your camera*. Only convert once at export.
The major error, however, is to use Proof Colours with your Monitor profile. This will apply a double translation & generally look ...
Those images have one thing in common. That is the warm color tone and also the neutral whites. Take a look at this image:
Did you ever see a gray sky like this? To achieve this look I would go to the HSL section in the develop tab in lightroom and set the saturation of cooler colors to a small value. I would not set them to 0 because then you ...
DPI is only meaningful for print or a physical display. If you are still seeing and printing the image at the same size, then nothing changes.
Now, if you change the DPI and render the image at that DPI, the image will become smaller. This will make the image look sharper just because details are smaller.