run "python demo.py" issue

[Jaypancool]

When I run:
Python demo.py
it traceback:

• jaypan@jaypan-X555LF:~/projects/SeqSLAM/pySeqSLAM/pyseqslam$ python demo.py
  Warning: Environment variable DATASET_1_PATH not found! Trying '../datasets/nordland/64x32-grayscale-1fps/spring'
  Warning: Environment variable DATASET_2_PATH not found! Trying '../datasets/nordland/64x32-grayscale-1fps/winter'
  Preprocessing dataset spring, indices 1 - 35601 ...
  /home/jaypan/projects/SeqSLAM/pySeqSLAM/pyseqslam/seqslam.py:139: RuntimeWarning: invalid value encountered in divide
  img[n[i]:n[i+1], m[j]:m[j+1]] = 127+np.reshape(np.round((pp-np.mean(pp))/np.std(pp, ddof=1)), (s, s))
  Traceback (most recent call last):
  File "demo.py", line 99, in
  demo()
  File "demo.py", line 82, in demo
  results = ss.run()
  File "/home/jaypan/projects/SeqSLAM/pySeqSLAM/pyseqslam/seqslam.py", line 22, in run
  results = self.doPreprocessing()
  File "/home/jaypan/projects/SeqSLAM/pySeqSLAM/pyseqslam/seqslam.py", line 60, in doPreprocessing
  savemat(filename, {'results_preprocessing': results_preprocessing})
  File "/usr/local/lib/python2.7/dist-packages/scipy/io/matlab/mio.py", line 204, in savemat
  file_stream = open(file_name, 'wb')
  IOError: [Errno 2] No such file or directory: 'results/preprocessing-spring-1-100-35601.mat'
  What's the wrong?

[marsywhuang]

Hi Jaypancool
Try to give a subdirectory, which name is results, under pyseqslam directory

[Ahmedest61]

I'm facing following error when I run the demo.py script
"""
v = D[a:b, :]
TypeError: slice indices must be integers or None or have an index method
"""
Is any of you came across this error?

[hmishra2250]

The solution is to create a results directory inside the pyseqslam directory and then run demo. It will automatically take care of the rest.

[LYRen1900]

I'm facing following error when I run the demo.py script
"""
v = D[a:b, :]
TypeError: slice indices must be integers or None or have an index method
"""
Is any of you came across this error?

Hi, Ahmedest61.
line 189 and 190 in pyseqslam.py , it is should be changed as: "a=np.max((0, i-self.params.contrastEnhancement.R//2))
b=np.min((D.shape[0], i+self.params.contrastEnhancement.R//2+1)) "
line246 in pyseqslam.py , it is should be changed as :"for N in range(self.params.matching.ds//2, DD.shape[1]-self.params.matching.ds//2): "