def crop_mrc(mrc_path,
crop_path,
x=0,
y=0,
z=0,
dx=100,
dy=100,
dz=100,
print_header_diff=False):
"""Crop specified part of a 3d mrc file, position cropped: mrc.data[x:x+dx, y:y+dy, z:z+dz].
Note that the axis order of mrc data is (x, y, z), different from that downstream tasks use, eg. read_mrc_data and imod: (z, y, x).
Arguments:
mrc_path -- source mrc file path
crop_path -- destination path of cropped mrc file
Keyword Arguments:
x {int} -- lowerbound x coordinate to crop (default: {0})
y {int} -- lowerbound y coordinate to crop (default: {0})
z {int} -- lowerbound z coordinate to crop (default: {0})
dx {int} -- length of x to crop (default: {100})
dy {int} -- length of y to crop (default: {100})
dz {int} -- length of z to crop (default: {100})
print_header_diff {bool} -- whether to print difference between the cropped and original (default: {False})
"""
# Use mmap for faster reading large mrcfile
with mrcfile.mmap(mrc_path,
mode='r') as mrc, mrcfile.new(crop_path) as mrc_crop:
mrc_crop.set_data(
mrc.data[x:x + dx, y:y + dy, z:z +
dz]) # set_data automatically syncs header info with data
mrc_crop.voxel_size = mrc.voxel_size
mrcfile.validate(crop_path)
# Print header diff
if print_header_diff:
mrc_header = io_file.read_mrc_header(mrc_path)
crop_header = io_file.read_mrc_header(crop_path)
diffs = []
for (k1, v1), (k2, v2) in zip(mrc_header.items(), crop_header.items()):
if k1 == k2 and v1 != v2:
if isinstance(v1, dict):
assert len(v1) == len(
v2), "Different dict size: {}, {}".format(
len(v1), len(v2))
diff_dict = {
k: (v1[k], v2[k])
for k in v1 if k in v2 and v1[k] != v2[k]
}
print("diff key: ", k1, "\ndiff_dict:\n", diff_dict)
else:
print("diff key: ", k1, "\n", v1, "\n", v2, "\n")
diffs.append((v1, v2))
print("# diffs: ", len(diffs))
def main():
path, output = getParams()
# Also, we can crop and only use part of the mrc image instead of binning for tasks requiring higher resolution
# crop_path = 'cropped.mrc'
# crop_mrc(path, crop_path)
mrc_header = io_file.read_mrc_header(path)
voxel_spacing_in_nm = mrc_header['MRC']['xlen'] / mrc_header['MRC'][
'nx'] / 10
print("voxel_spacing_in_nm: %s" % voxel_spacing_in_nm)
# Note: with our test data, voxel_spacing_in_nm has 0 and next division fails.
sigma1 = 2
try:
# In general, 7 is optimal sigma1 val in nm according to the paper and sigma1 should at least be 2
sigma1 = max(int(7 / voxel_spacing_in_nm), sigma1)
except Exception as e:
pass
print('sigma1=%d' % sigma1)
# For particular tomogram, larger sigma1 value may have better results.
# Use IMOD to display selected peaks and determine best sigma1.
# For 'aitom_demo_cellular_tomogram.mrc', sigma1 is 5 rather than 3 for better performance
# (in this tomogram, 7nm corresponds to 3.84 pixels)
# print(mrc_header['MRC']['xlen'], mrc_header['MRC']['nx'], voxel_spacing_in_nm, sigma1)
partition_op = {
'nonoverlap_width': sigma1 * 20,
'overlap_width': sigma1 * 10,
'save_vg': False
}
result = picking(path,
s1=sigma1,
s2=sigma1 * 1.1,
t=3,
find_maxima=False,
partition_op=partition_op,
multiprocessing_process_num=100)
print("%d particles detected, containing redundant peaks" % len(result))
# remove redundant peaks
result = do_filter(pp=result, peak_dist_min=sigma1, op=None)
print("peak number reduced to %d" % len(result))
pprint(result[:5])
# generate file for 3dmod
json_data = []
for i in range(len(result)):
loc_np = result[i]['x']
loc = []
for j in range(len(loc_np)):
loc.append(loc_np[j].tolist())
json_data.append({'peak': {'loc': loc}})
with open(output, 'w') as f:
json.dump(json_data, f)
def main():
# Download from: https://cmu.box.com/s/9hn3qqtqmivauus3kgtasg5uzlj53wxp
path = '/ldap_shared/home/v_zhenxi_zhu/data/aitom_demo_cellular_tomogram.mrc'
# Also, we can crop and only use part of the mrc image instead of binning for tasks requiring higher resolution
# crop_path = 'cropped.mrc'
# crop_mrc(path, crop_path)
mrc_header = io_file.read_mrc_header(path)
voxel_spacing_in_nm = mrc_header['MRC']['xlen'] / mrc_header['MRC'][
'nx'] / 10
sigma1 = max(
int(7 / voxel_spacing_in_nm), 2
) # 7 is optimal sigma1 val in nm according to the paper and sigma1 should at least be 2
# print(mrc_header['MRC']['xlen'], mrc_header['MRC']['nx'], voxel_spacing_in_nm, sigma1)
partition_op = {
'nonoverlap_width': sigma1 * 20,
'overlap_width': sigma1 * 10,
'save_vg': False
}
result = picking(path,
s1=sigma1,
s2=sigma1 * 1.1,
t=3,
find_maxima=False,
partition_op=partition_op,
multiprocessing_process_num=100)
print("%d particles detected, containing redundant peaks" % len(result))
result = do_filter(pp=result, peak_dist_min=sigma1,
op=None) # remove redundant peaks
print("peak number reduced to %d" % len(result))
pprint(result[:5])
# Display selected peaks using imod/3dmod (http://bio3d.colorado.edu/imod/)
a = io_file.read_mrc_data(path)
json_data = [] # generate file for 3dmod
for i in range(len(result)):
loc_np = result[i]['x']
loc = []
for j in range(len(loc_np)):
loc.append(loc_np[j].tolist())
json_data.append({'peak': {'loc': loc}})
with open('data_json_file.json', 'w') as f:
json.dump(json_data, f)
dj = json_data
x = N.zeros((len(dj), 3))
for i, d in enumerate(dj):
x[i, :] = N.array(d['peak']['loc'])
l = generate_lines(x_full=x, rad=sigma1)
display_map_with_lines(l=l, map_file=path)
def select_sigma(self):
mrc_header = io_file.read_mrc_header(self.path)
voxel_spacing_in_nm = mrc_header['MRC']['xlen'] / mrc_header['MRC']['nx'] / 10
# In general, 7 is optimal sigma1 val in nm according to the paper and sigma1 should at least be 2
return max(7 / voxel_spacing_in_nm, 2)
def main():
# Download from: https://cmu.box.com/s/9hn3qqtqmivauus3kgtasg5uzlj53wxp
path = '/ldap_shared/home/v_zhenxi_zhu/data/aitom_demo_single_particle_tomogram.mrc'
# Also, we can crop and only use part of the mrc image instead of binning for tasks requiring higher resolution
# crop_path = 'cropped.mrc'
# crop_mrc(path, crop_path)
mrc_header = io_file.read_mrc_header(path)
voxel_spacing_in_nm = mrc_header['MRC']['xlen'] / mrc_header['MRC'][
'nx'] / 10
sigma1 = max(
int(7 / voxel_spacing_in_nm), 2
) # In general, 7 is optimal sigma1 val in nm according to the paper and sigma1 should at least be 2
print('sigma1=%d' % sigma1)
# For particular tomogram, larger sigma1 value may have better results. Use IMOD to display selected peaks and determine best sigma1.
# For 'aitom_demo_cellular_tomogram.mrc', sigma1 is 5 rather than 3 for better performance(in this tomogram, 7nm corresponds to 3.84 pixels)
# print(mrc_header['MRC']['xlen'], mrc_header['MRC']['nx'], voxel_spacing_in_nm, sigma1)
partition_op = {
'nonoverlap_width': sigma1 * 20,
'overlap_width': sigma1 * 10,
'save_vg': False
}
result = picking(path,
s1=sigma1,
s2=sigma1 * 1.1,
t=3,
find_maxima=False,
partition_op=partition_op,
multiprocessing_process_num=10,
pick_num=1000)
print("DoG done, %d particles picked" % len(result))
pprint(result[:5])
# (Optional) Save subvolumes of peaks for autoencoder input
dump_subvols = True
if dump_subvols: # use later for autoencoder
subvols_loc = "demo_single_particle_subvolumes.pickle"
from aitom.classify.deep.unsupervised.autoencoder.autoencoder_util import peaks_to_subvolumes
a = io_file.read_mrc_data(path)
d = peaks_to_subvolumes(im_vol_util.cub_img(a)['vt'], result, 32)
io_file.pickle_dump(d, subvols_loc)
print("Save subvolumes .pickle file to:", subvols_loc)
# Display selected peaks using imod/3dmod (http://bio3d.colorado.edu/imod/)
'''
#Optional: smooth original image
a = io_file.read_mrc_data(path)
path =path[:-5]+'_smoothed'+path[-4:]
temp = im_vol_util.cub_img(a)
s1 = sigma1
s2=sigma1*1.1
vg = dog_smooth(temp['vt'], s1,s2)
#vg = smooth(temp['vt'], s1)
TIM.write_data(vg,path)
'''
json_data = [] # generate file for 3dmod
for i in range(len(result)):
loc_np = result[i]['x']
loc = []
for j in range(len(loc_np)):
loc.append(loc_np[j].tolist())
json_data.append({'peak': {'loc': loc}})
with open('data_json_file.json', 'w') as f:
json.dump(json_data, f)
dj = json_data
x = N.zeros((len(dj), 3))
for i, d in enumerate(dj):
x[i, :] = N.array(d['peak']['loc'])
l = generate_lines(x_full=x, rad=sigma1)
display_map_with_lines(l=l, map_file=path)
for j in range(cluster_center_number)])
for i in range(0, b.shape[0]):
for j in range(0, b.shape[1]):
for k in range(0, b.shape[2]):
sum_f[label[i][j][k]][1] = sum_f[label[i][j][k]][1] + 1
sum_f[label[i][j]
[k]][0] = sum_f[label[i][j][k]][0] + b[i][j][k]
for i in range(cluster_center_number):
assert sum_f[i][1] > 0
result[i] = sum_f[i][0] / sum_f[i][1]
return result
if __name__ == "__main__":
path = './aitom_demo_single_particle_tomogram.mrc' # file path
mrc_header = io_file.read_mrc_header(path)
a = io_file.read_mrc_data(path) # volume data
assert a.shape[0] > 0
a = a.astype(np.float32)
print("file has been read, shape is", a.shape)
start_time = time.time()
saliency_detection(a=a,
gaussian_sigma=2.5,
gabor_sigma=14.0,
gabor_lambda=13.0,
cluster_center_number=10000,
multiprocessing_num=0,
pick_num=1000,
save_flag=True)
end_time = time.time()
print('saliency detection takes', end_time - start_time, 's')
