From 3e65f172182a2946c945fa1738f659316c6d2300 Mon Sep 17 00:00:00 2001
From: Anton Akhmerov <anton.akhmerov@gmail.com>
Date: Sat, 21 Apr 2018 17:52:16 +0200
Subject: [PATCH] allow using monochromatic scans
---
zesje/helpers/pdf_helper.py | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/zesje/helpers/pdf_helper.py b/zesje/helpers/pdf_helper.py
index 08b7d5153..0ce351034 100644
--- a/zesje/helpers/pdf_helper.py
+++ b/zesje/helpers/pdf_helper.py
@@ -258,10 +258,12 @@ def guess_dpi(image_array):
def rotate_and_shift(image_data, extracted_qr, qr_coords):
"""Roll the image such that QR occupies coords specified by the template."""
page, position = extracted_qr.page, extracted_qr.coords
- image = np.asarray(image_data)
+ image = np.array(image_data)
if image.shape[0] < image.shape[1]:
- image = np.transpose(image, (1, 0, 2))
+ image = np.copy(np.transpose(
+ image, ((1, 0) if len(image.shape) == 2 else (1, 0, 2))
+ ))
dpi = guess_dpi(image)
h, w, *_ = image.shape
@@ -280,6 +282,10 @@ def rotate_and_shift(image_data, extracted_qr, qr_coords):
shifted_image = np.roll(image, shift[0], axis=0)
shifted_image = np.roll(shifted_image, shift[1], axis=1)
+ # Workaround of https://github.com/python-pillow/Pillow/issues/3109
+ if shifted_image.dtype == bool:
+ shifted_image = shifted_image * np.uint8(255)
+
return Image.fromarray(shifted_image)
--
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