A bash script for extracting the full-resolution lock-screen spotlight images on Windows 10. Skips images whose size and layout indicate that they are thumbnails or cropped. Invokes itself recursively in parallel, in order to achieve reasonable performance. Intended for execution with Cygwin's bash shell; Requires ImageMagick.

WindowsSpotlightViewImages.bash

#!/usr/bin/env bash
# -*- coding: iso-safe-unix -*-
set -e -E -u

#### SETTINGS
SPOTLIGHT_PATH="$(cygpath $LOCALAPPDATA)/Packages/Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy/LocalState/Assets"
OUTPUT_PATH='/tmp/SPOTLIGHT_DISPLAY'

#### CODE

if [[ $# = 1 ]]; then
    OLDNAME="$1"
    NEWNAME="$OLDNAME.jpg"
    OLDPATH="$SPOTLIGHT_PATH/$OLDNAME"
    NEWPATH="$OUTPUT_PATH/$NEWNAME"
    NEWPATHALT="$OUTPUT_PATH/other/$NEWNAME"
    SIZE=($(convert "$OLDPATH" -format '%[fx:w] %[fx:h]' info:))
    if [[ -e $NEWPATH ]]; then
        echo "(E) $(printf %10s '???x???') $OLDNAME"
    elif [[ -e $NEWPATHALT ]]; then
        echo "(O) $(printf %10s '???x???') $OLDNAME"
    else
        SIZEX="${SIZE[0]}"
        SIZEY="${SIZE[1]}"
        SIZEF="$(printf '%10s' "${SIZEX}x${SIZEY}")"
        ISLANDSCAPE=$([[ $SIZEX -gt $SIZEY ]] && echo true || echo false)
        if [[ $SIZEX -le $SIZEY ]]; then
            echo "(S) $SIZEF $OLDNAME (not landscape)"
            cp "$OLDPATH" "$NEWPATHALT"
        elif [[ $SIZEX -lt 800 ]]; then
            echo "(S) $SIZEF $OLDNAME (too small)"
            cp "$OLDPATH" "$NEWPATHALT"
        else
            echo "(N) $SIZEF $OLDNAME"
            cp "$OLDPATH" "$NEWPATH"
        fi
    fi
else
    mkdir -p "$OUTPUT_PATH"
    mkdir -p "$OUTPUT_PATH/other"
    (cd "$SPOTLIGHT_PATH" && ls -1 --sort=time --reverse) |\
        xargs -P 4 -n 1 -d $'\n' "$0"
    ( cd "$OUTPUT_PATH/" && explorer . )
fi