48 lines
1.9 KiB
Shell
48 lines
1.9 KiB
Shell
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#!/bin/sh
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# fpenrol.sh -- enrol a finger with COVERAGE guidance.
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#
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# fpenrol.sh [finger_name] default right-middle-finger
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#
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# The first template on this device was enrolled from ten quick taps in
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# roughly one position, and it matches roughly one frame in seven -- against
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# 47-75% for the template the research harness enrolled. The algorithm was
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# given ten near-duplicate images of one spot, so it recognises that spot and
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# little else.
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#
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# This walks a different contact position per accepted sample. It reads
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# fprintd-enroll's per-stage output and prompts the next position as each
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# stage passes, so the guidance tracks what the trustlet ACCEPTED rather than
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# how many times you pressed.
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F=${1:-right-middle-finger}
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i=1
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set -- "centre of the pad" \
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"slightly LEFT of centre" \
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"slightly RIGHT of centre" \
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"higher up, toward the TIP" \
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"lower down, toward the JOINT" \
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"centre again, rolled LEFT" \
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"centre again, rolled RIGHT" \
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"tip, rolled slightly left" \
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"joint, rolled slightly right" \
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"centre, pressed a little firmer"
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echo "enrolling $F with position guidance -- 10 samples"
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echo "press FLAT and firm, hold about a second, then LIFT fully."
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echo
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# The reader runs in a subshell, so `shift` there cannot advance the caller's
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# list. Index into it instead.
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pos() { eval "printf '%s' \"\$$1\""; }
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echo ">>> sample 1/10: $(pos 1)"
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fprintd-enroll -f "$F" user 2>&1 | while IFS= read -r line; do
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case "$line" in
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*enroll-stage-passed*)
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i=$((i+1))
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if [ "$i" -le 10 ]; then
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echo " accepted."
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echo ">>> sample $i/10: $(pos $i)"
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fi ;;
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*enroll-retry-scan*) echo " not accepted -- same position, press flatter and firmer" ;;
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*enroll-completed*) echo; echo "COMPLETED." ;;
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*enroll-failed*) echo; echo "FAILED." ;;
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*) printf '%s\n' "$line" ;;
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esac
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done
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