The -Log parameter will start a log creation procedure (in case new files were acquired), in which the extracted image properties are written to a new CSV file ( spotlight_log.csv) or appended to an existing log file. To exclude the portrait pictures from the results altogether, the parameter -ExcludePortrait may be added to the command launching Get-Windows10LockScreenWallpapers. The images are loaded as ImageFile COM objects with Microsoft Windows Image Acquisition (WIA, which relies on the Windows Image Acquisition (WIA) service ' stisvc'), and over 300 image properties (usually, though, most of them are empty or non-existent.) are read from the pictures before the new images are copied to their final destination. The primary save location ("destination") may be set with the -Output parameter, and the name of the subfolder may be changed with the -Subfolder parameter – the former accepts a full path as a value, and the latter just a plain directory name. By default Get-Windows10LockScreenWallpapers writes the landscape files to " $($env:USERPROFILE)\Pictures\Wallpapers"(, which is the default -Output directory), and the portrait pictures are placed in a subfolder called " Vertical" inside the folder specified with the -Output parameter. Get-Windows10LockScreenWallpapers uses the inbuilt Get-FileHash cmdlet to calculate SHA256 hash values of the files for determining, whether a wallpaper already exists in the -Output folder or a portrait picture in the -Subfolder directory. By adding the -IncludeHive parameter to the command launching Get-Windows10LockScreenWallpapers the third method of wallpaper searching will be enabled, so that Get-Windows10LockScreenWallpapers will also look to the current lock screen hive, even if the first method (registry) or the second method (estimation) was selected as the primary method for searching the available local lock screen wallpapers. The methods are tested in an ascending order and selected as the primary (only) method, if deemed to be valid. Figuring out the current lock screen hive (which usually is in the $env:windir\Web\Screen directory).Estimating the * value (and the source path) in " $($env:LOCALAPPDATA)\Packages\*\LocalState\Assets" path, which on most Windows 10 machines would most likely point to the " \_cw5n1h2txyewy\LocalState\Assets" directory.
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