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fix fingerprint save for r503 sensor example #25

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Merged
merged 1 commit into from
Nov 23, 2020
Merged

fix fingerprint save for r503 sensor example #25

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20 changes: 16 additions & 4 deletions examples/fingerprint_r503_rpi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -154,13 +154,25 @@ def enroll_finger(location):

def save_fingerprint_image(filename):
"""Scan fingerprint then save image to filename."""
while finger.get_image():
pass
print("Place finger on sensor...", end="", flush=True)
while True:
i = finger.get_image()
if i == adafruit_fingerprint.OK:
print("Image taken")
break
if i == adafruit_fingerprint.NOFINGER:
print(".", end="", flush=True)
elif i == adafruit_fingerprint.IMAGEFAIL:
print("Imaging error")
return False
else:
print("Other error")
return False

# let PIL take care of the image headers and file structure
from PIL import Image # pylint: disable=import-outside-toplevel

img = Image.new("L", (256, 288), "white")
img = Image.new("L", (192, 192), "white")
pixeldata = img.load()
mask = 0b00001111
result = finger.get_fpdata(sensorbuffer="image")
Expand All @@ -178,7 +190,7 @@ def save_fingerprint_image(filename):
pixeldata[x, y] = (int(result[i]) >> 4) * 17
x += 1
pixeldata[x, y] = (int(result[i]) & mask) * 17
if x == 255:
if x == 191:
x = 0
y += 1
else:
Expand Down