branch: iss1 RuntimeError: Image view dimensions out of range for data

[mondaugen]

here is my program:

import sys
import string

from gamera.core import *
from gamera.toolkits import staffline_removal
from gamera.toolkits import lyric_extraction

init_gamera()

def print_image_data(self):
  print "stride", self.data.stride
  print "ncols", self.data.ncols
  print "nrows", self.data.nrows
#  print "dim", self.data.dim
  print "page_offset_x", self.data.page_offset_x
  print "page_offset_y", self.data.page_offset_y
#  print "offset", self.data.offset
  print "size", self.data.size

# Load image from command line
image = load_image(sys.argv[1])

print "image data after load"
print type(image)
print_image_data(image)

# Binarize image
onebit = image.djvu_threshold()

print "image data after binarization"
print type(onebit)
print_image_data(onebit)

# get an estimation of staff height
sh = onebit.staffheight_estimation()
# staffspace
ss = onebit.staffspace_estimation()
# do lyric line detection
llmask = onebit.baseline_detection(ss) #<--- the problem happens here
print 'Staff-height estimation', sh,'Staff-space estimation', ss

# outputfile path
if '.' in sys.argv[1]:
  fpath = string.join(sys.argv[1].split('.')[0:-1],'.')+"_llmask.png"
else:
  fpath = sys.argv[1]+"_llmask.png"

llmask.save_PNG(fpath)

end program

here is the output of the program

image data after load
<class 'gamera.core.Image'>
stride 2712
ncols 2712
nrows 3368
page_offset_x 0
page_offset_y 0
size 9134016
image data after binarization
<class 'gamera.core.Image'>
stride 2712
ncols 2712
nrows 3368
page_offset_x 0
page_offset_y 0
size 9134016
staffspace:36, staffheight:4
staffspace:36, staffheight:4
Traceback (most recent call last):
  File "./lyric-baseline-study.py", line 40, in <module>
    llmask = onebit.baseline_detection(ss)
  File "/Users/nickesterer/Documents/development/gamera_env/lib/python2.7/site-packages/gamera/toolkits/lyric_extraction/plugins/lyricline.py", line 93, in __call__
    valid_angle_degree, scalar_valid_height, valid_min_group)
RuntimeError: Image view dimensions out of range for data
    nrows 27
    offset_y 3342
    data nrows 3368
    data offset_y 0
    ncols 37
    offset_x 66
    data ncols 2712
    data offset_x 0

This was happening before installing the most recent commit to DDMAL/document-preprocessing-toolkit, but only on some images and not on others. Now using the same images as before, it happens on all images.

[mondaugen]

what is interesting to notice is that offset_y + nrows = 3369 which is 1 greater than data grows

this is the output with a different image

image data after load
<class 'gamera.core.Image'>
stride 3328
ncols 3328
nrows 4992
page_offset_x 0
page_offset_y 0
size 16613376
image data after binarization
<class 'gamera.core.Image'>
stride 3328
ncols 3328
nrows 4992
page_offset_x 0
page_offset_y 0
size 16613376
staffspace:11, staffheight:1
staffspace:11, staffheight:1
Traceback (most recent call last):
  File "./lyric-baseline-study.py", line 40, in <module>
    llmask = onebit.baseline_detection(ss)
  File "/Users/nickesterer/Documents/development/gamera_env/lib/python2.7/site-packages/gamera/toolkits/lyric_extraction/plugins/lyricline.py", line 93, in __call__
    valid_angle_degree, scalar_valid_height, valid_min_group)
RuntimeError: Image view dimensions out of range for data
    nrows 4993
    offset_y 0
    data nrows 4992
    data offset_y 0
    ncols 12
    offset_x 0
    data ncols 3328
    data offset_x 0

nrows + offset_y is again 4993, 1 greater than data nrows

[mondaugen]

okay now i'm confused

i just tried the above program on a tiff and it worked (output a file showing the baseline estimation)

both images above were png

i converted one to tiff and it worked, the other still did not work after conversion (had this problem)

Traceback (most recent call last):
  File "./lyric-baseline-study.py", line 43, in <module>
    llmask = onebit.baseline_detection(ss)
  File "/Users/nickesterer/Documents/development/gamera_env/lib/python2.7/site-packages/gamera/toolkits/lyric_extraction/plugins/lyricline.py", line 93, in __call__
    valid_angle_degree, scalar_valid_height, valid_min_group)
RuntimeError: Image view dimensions out of range for data
    nrows 27
    offset_y 3342
    data nrows 3368
    data offset_y 0
    ncols 37
    offset_x 66
    data ncols 2712
    data offset_x 0

[ahankinson]

You really should send this to the gamera-devel list.

Make sure you include enough information for them to be able to replicate your error. Post a link to a short script and an image that demonstrates this problem.

On 2013-05-09, at 10:58 AM, mondaugen notifications@github.com wrote:

okay now i'm confused

i just tried the above program on a tiff and it worked (output a file showing the baseline estimation)

both images above were png

i converted one to tiff and it worked, the other still did not work after conversion (had this problem)

Traceback (most recent call last):
File "./lyric-baseline-study.py", line 43, in
llmask = onebit.baseline_detection(ss)
File "/Users/nickesterer/Documents/development/gamera_env/lib/python2.7/site-packages/gamera/toolkits/lyric_extraction/plugins/lyricline.py", line 93, in call
valid_angle_degree, scalar_valid_height, valid_min_group)
RuntimeError: Image view dimensions out of range for data
nrows 27
offset_y 3342
data nrows 3368
data offset_y 0
ncols 37
offset_x 66
data ncols 2712
data offset_x 0
—
Reply to this email directly or view it on GitHub.

[mondaugen]

I signed up, just waiting to be admitted.

For now a folder containing a description, a script, some images and some error logs can be found at:

https://github.com/mondaugen/baseline-bug