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Fix handling of DPI for rare case of JPEG recompression after deskew/clean

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This test is exercised by page 4 of multipage.pdf. If all images are
JPEGs, and one of deskew/clean removes DPI information, make sure that
we can get the right information back and that the DPI stays square.
This commit is contained in:
James R. Barlow
2016-07-29 01:34:52 -07:00
parent 8f77576dc4
commit fef35e4eb2
4 changed files with 19 additions and 11 deletions
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tests/resources/README.rst
+2 -2
View File
@@ -14,9 +14,9 @@ In some cases they were converted from one image format to another without other
+=====================+================================================================================+
| c02-22.pdf | `Project Gutenberg`_, Adventures of Huckleberry Finn, page 22 |
+---------------------+--------------------------------------------------------------------------------+
| congress.jpg | `US Congressional Records`_ |
| congress.jpg | `US Congressional Records`_ (Public Domain) |
+---------------------+--------------------------------------------------------------------------------+
| graph.pdf | `Wikimedia: Pandas text analysis.png`_ |
| graph.pdf | `Wikimedia: Pandas text analysis.png`_ (Public Domain) |
+---------------------+--------------------------------------------------------------------------------+
| lichtenstein.pdf | `Wikimedia: JPEG2000 Lichtenstein`_ (Creative Commons BY-SA 3.0) |
+---------------------+--------------------------------------------------------------------------------+
tests/test_main.py
+3 -3
View File
@@ -565,8 +565,8 @@ def test_algo4():
@pytest.mark.parametrize('renderer', [
'hocr'])
def test_non_square_resolution(renderer):
'hocr']) # tesseract cannot pass this test yet
def test_non_square_resolution(renderer, spoof_tesseract_cache):
# Confirm input image is non-square resolution
in_pageinfo = pdf_get_all_pageinfo(_infile('aspect.pdf'))
assert in_pageinfo[0]['xres'] != in_pageinfo[0]['yres']
@@ -574,7 +574,7 @@ def test_non_square_resolution(renderer):
out = 'aspect_%s.pdf' % renderer
check_ocrmypdf(
'aspect.pdf', out,
'--pdf-renderer', renderer)
'--pdf-renderer', renderer, env=spoof_tesseract_cache)
out_pageinfo = pdf_get_all_pageinfo(_outfile(out))