scipy.io.matlab.miobase.MatReadError: Mat file appears to be empty

[Lvhhhh]

matlab:2014a python:2.7 windows

here is the selective_search.py:

import tempfile import subprocess import shlex import os import numpy as np import scipy.io

script_dirname = os.path.abspath(os.path.dirname(file))

def get_windows(image_fnames, cmd='selective_search'): """ Run MATLAB Selective Search code on the given image filenames to generate window proposals.

Parameters
----------
image_filenames: strings
    Paths to images to run on.
cmd: string
    selective search function to call:
        - 'selective_search' for a few quick proposals
        - 'selective_seach_rcnn' for R-CNN configuration for more coverage.
"""
# Form the MATLAB script command that processes images and write to
# temporary results file.
f, output_filename = tempfile.mkstemp(suffix='.mat')
os.close(f)
fnames_cell = '{' + ','.join("'{}'".format(x) for x in image_fnames) + '}'
command = "{}({}, '{}')".format(cmd, fnames_cell, output_filename)
print(command)

# Execute command in MATLAB.
mc = "matlab -nojvm -r \"try; {}; catch; exit; end; exit\"".format(command)
pid = subprocess.Popen(
    shlex.split(mc), stdout=open('NUL', 'w'), cwd=script_dirname)
retcode = pid.wait()
if retcode != 0:
    raise Exception("Matlab script did not exit successfully!")

# Read the results and undo Matlab's 1-based indexing.
all_boxes = list(scipy.io.loadmat(output_filename)['all_boxes'][0])
subtractor = np.array((1, 1, 0, 0))[np.newaxis, :]
all_boxes = [boxes - subtractor for boxes in all_boxes]

# Remove temporary file, and return.
os.remove(output_filename)
if len(all_boxes) != len(image_fnames):
    raise Exception("Something went wrong computing the windows!")
return all_boxes

if name == 'main': """ Run a demo. """ import time

image_filenames = [
    script_dirname + '\\000015.jpg',
    script_dirname + '\\cat.jpg'
] * 4
t = time.time()
boxes = get_windows(image_filenames)
print(boxes[:2])
print("Processed {} images in {:.3f} s".format(
    len(image_filenames), time.time() - t))

when i run python selective_search.py in cmd: it have problem: selective_search({'D:\selective_search_ijcv_with_python\selective_search_ijcv_wi th_python\000015.jpg','D:\selective_search_ijcv_with_python\selective_search_ijc v_with_python\cat.jpg','D:\selective_search_ijcv_with_python\selective_search_ij cv_with_python\000015.jpg','D:\selective_search_ijcv_with_python\selective_searc h_ijcv_with_python\cat.jpg','D:\selective_search_ijcv_with_python\selective_sear ch_ijcv_with_python\000015.jpg','D:\selective_search_ijcv_withpython\selective search_ijcv_with_python\cat.jpg','D:\selective_search_ijcv_with_python\selective _search_ijcv_with_python\000015.jpg','D:\selective_search_ijcv_with_python\selec tive_search_ijcv_with_python\cat.jpg'}, 'c:\users\lh7610~1.arc\appdata\local\tem p\tmpp6f4z8.mat') Traceback (most recent call last): File "selective_search.py", line 63, in boxes = get_windows(image_filenames) File "selective_search.py", line 42, in get_windows all_boxes = list(scipy.io.loadmat(output_filename)['all_boxes'][0]) File "D:\python\lib\site-packages\scipy\io\matlab\mio.py", line 135, in loadma t MR = mat_reader_factory(file_name, appendmat, **kwargs) File "D:\python\lib\site-packages\scipy\io\matlab\mio.py", line 59, in mat_rea der_factory mjv, mnv = get_matfile_version(byte_stream) File "D:\python\lib\site-packages\scipy\io\matlab\miobase.py", line 224, in ge t_matfile_version raise MatReadError("Mat file appears to be empty")

scipy.io.matlab.miobase.MatReadError: Mat file appears to be empty

1.the path of my picture is right. 2.i check the c:\users\lh7610~1.arc\appdata\local\temp and found no mat file. 3.i think the matlab cannot produce the mat file even though it has right picture path. 4.i have put the path "D:\selective_search_ijcv_with_python\selective_search_ijcv_with_python" in PYTHONPATH , caffe_ROOT and path. 5.when i "python selective_search",i can see matlab commit windows and disappear in a while. who can help me!!