def __call__(self, img, bgsource = None, methods = ['subtract'], **kwargs):
if bgsource is None:
logger.error(("No background image given to "
"RemoveBackgroundPreprocessor, doing nothing!"))
return img
if bgsource not in self.bgs:
logger.debug("Loading background image {}".format(bgsource))
# Load background image
try:
self.bgs[bgsource] = self.manager.loadimage(bgsource)
except IOError, fire.errors.ImageCannotBeLoadedError:
logger.error(("Unable to load background image '{}', doing "
"nothing!").format(bgsource))
return img
# If preprocessing steps are not explicity given, use preprocessing
# chain used for all images, up to the point where background is
# removed
if not 'preprocsteps' in kwargs:
preprocsteps = self.get_previous_preprocsteps()
if preprocsteps is None:
return img
else:
preprocsteps = kwargs['preprocsteps']
self.bgs[bgsource] = self.manager.preprocess(self.bgs[bgsource],
preprocsteps)
self.bgs_nonzero[bgsource] = self.bgs[bgsource].copy()
self.bgs_nonzero[bgsource][self.bgs[bgsource] == 0.] = (0.01 *
self.bgs[bgsource].max())
logger.debug("Background image {} loaded".format(bgsource))
def showimg(img, cbar = False, cmap = plt.cm.Greys_r):
logger.debug("Plotting image, dimensions: {}".format(img.shape))
plt.figure()
plt.imshow(img, interpolation = 'none', cmap = cmap)
if cbar:
plt.colorbar()
plt.show()
def saveimg(filename, img, normalise = True):
"""Save img to filename using colormap cmap."""
logger.debug("Saving image to {}".format(filename))
if normalise:
img -= img.min()
img /= img.max()
img = np.uint8(img*255)
from PIL import Image
im = Image.fromarray(img)
im.save(filename)
def export(self, infile, detected, exportsteps):
try:
os.makedirs(os.path.dirname(fire.exporters.outfilebase(infile)))
except OSError as e:
if e.errno != 17: # directory exists
raise
for ename, eargs in exportsteps:
logger.debug("Calling exporter '{}' with arguments: {}".format(
ename, str(eargs)))
self.exporters[ename](infile, detected, **eargs)
def __call__(
self,
img,
prev_detected,
seed_threshold=None,
erode_factor=1,
minsize=0,
maxhole=0.5,
checkQsize=0,
minQ=0.5,
**kwargs
):
# Guess threshold if not given
if seed_threshold is None:
from fire.debug import showimg
# Otsu needs int, convert to range 0-255
normimg = (img - img.min()) / (img.max() - img.min())
intimg = np.rint(normimg * 255).astype(np.uint8)
intimg_threshold = self.mh.thresholding.otsu(intimg)
# Convert received threshold back to image range
seed_threshold = intimg_threshold / 255.0 * (img.max() - img.min()) + img.min()
logger.debug("Guessed threshold (Otsu): {}".format(seed_threshold))
# Find seeds
binary = img > seed_threshold
for i in range(erode_factor):
binary = self.mh.morph.erode(binary)
from fire.debug import showimg
showimg(binary)
seeds, nr_of_seeds = self.mh.label(binary)
logger.debug("Number of watershed seeds: {}".format(nr_of_seeds))
# Do watershed transformation
labeled = self.mh.cwatershed(img.max() - img, seeds)
logger.debug("Number of areas: {}".format(len(labeled)))
# Extract sizes of area and filter for minsize
sizes = np.bincount(labeled.flat)
bigareas = np.argwhere(sizes > maxhole * minsize)
logger.debug("With minimum size (holes not filled) {}: {}".format(maxhole * minsize, len(bigareas)))
# Create detection info
detected = NonOverlappingFreeAreasInfo(
np.zeros(img.shape, dtype=NonOverlappingFreeAreasInfo.smallest_uint_type(len(bigareas)))
)
for bigarea in bigareas:
filled = self.fill_holes(labeled == bigarea)
size = np.count_nonzero(filled)
if size < minsize:
continue
elif size < checkQsize and self.isoperimetric_quotient(filled) < minQ:
continue
else:
detected.addarea(filled)
logger.debug("Found {} areas".format(np.max(detected.labeledareas)))
return [detected]
def processchain(self, img, procsteps):
for p in self.processors.values():
p.reinit()
detected = []
for pname, pargs in procsteps:
logger.debug("Calling processor '{}' with arguments: {}".format(
pname, str(pargs)))
detected.append(
self.processors[pname](img, detected, **pargs)
)
return detected
def __call__(
self,
img,
prev_detected,
threshold=None,
minsize=0,
maxsize=None,
steps_prelabel=[],
steps_postlabel=[],
**kwargs
):
if threshold is None:
threshold = self.otsu(img)
logger.debug("Guessed threshold (Otsu): {}".format(threshold))
binary = img > threshold
for pdetected in prev_detected:
for d in pdetected:
binary[d.pixels()] = False
self.backgroundinfos = []
binary = self.do_steps(img, binary, steps_prelabel)
# Label
labeled, nr_labels = self.mh.label(binary)
logger.debug("Number of areas: {}".format(nr_labels))
# Filter for size requirements
sizes = np.bincount(labeled.flat)
considered_sizes = sizes >= minsize
if maxsize is not None:
considered_sizes = np.logical_and(considered_sizes, sizes <= maxsize)
considered_labels = np.argwhere(considered_sizes)
logger.debug("Meeting size requirements: {}".format(len(considered_labels)))
# Create detection info
detected = NonOverlappingFreeAreasInfo(
np.zeros(img.shape, dtype=NonOverlappingFreeAreasInfo.smallest_uint_type(len(considered_labels)))
)
for area_label in considered_labels:
if area_label == 0:
continue # ignore background
thisarea = labeled == area_label
try:
thisarea = self.do_steps(img, thisarea, steps_postlabel)
except self.RejectArea:
continue
detected.addarea(thisarea)
logger.debug("Found {} areas".format(np.max(detected.labeledareas)))
return self.backgroundinfos + [detected]
def __call__(self, img, prev_detected, **params):
"""Get list of circles in image using FCD.
Args:
img: Image to process (as nparray)
gaussian: standard deviation for Gaussian kernel
sobel: boolean value specifying whether to apply sobel
filter
minnorm: Gradient norm cutoff
alpha: FCD gradient angle difference tolerance
beta: FCD connecting line angle difference tolerance
gamma: FCD relative gradient norm difference tolerance
minr: Lower radius cutoff
maxr: Upper radius cutoff
radiusscaler: DBSCAN preprocessing radius coefficient
minmembers: Minimum number of cluster members PER UNIT
RADIUS for a cluster to be considered a detected circle
epsilon: DBSCAN neighbourhood size
minsamples: DBSCAN minimum cluster density in neighbourhood
maxangspread: TODO DOCUMENT THIS
Returns:
A list of DiskInfos
"""
# Copy given parameters and check for completeness
self.p.update(params)
if not self.all_params_set(params):
logger.critical("First FCD parameter set must be complete")
return []
# Figure out if we can use some previous calculations
startat = self.where_to_start(params)
logger.debug("Starting at {}".format(startat))
if self.img is None:
self.img = np.copy(img)
if self.neighbourhood_max_img is None and self.p["mincenterlevel"] is not None:
self.neighbourhood_max_img = self.generic_filter(self.img, np.max, 3)
if self.prev_detected is None:
self.prev_detected = list(prev_detected) # copy
# Process
firstnewcircle = len(self.allcircles)
if startat <= self.PREPROCESS:
logger.debug("Preprocessing image...")
self.img_preproc = self.preprocess(self.img, self.p["gaussian"], self.p["sobel"])
if startat <= self.GRADIENT:
logger.debug("Computing gradient...")
self.grad = self.gradient(self.img_preproc, prev_detected)
if startat <= self.FINDCANDIDATES:
logger.debug("Finding circle candidates...")
self.candidates = self.findcandidates(
self.grad,
self.p["alpha"],
self.p["beta"],
self.p["gamma"],
self.p["minnorm"],
self.p["maxr"],
self.p["mincenterlevel"],
)
logger.debug("Number of candidates: {}".format(len(self.candidates)))
if startat <= self.CLUSTER:
logger.debug("Clustering...")
circles = self.cluster(
self.candidates,
self.p["minr"],
self.p["maxr"],
self.p["radiusscaler"],
self.p["minmembers"],
self.p["epsilon"],
self.p["minsamples"],
self.p["maxangspread"],
)
logger.debug("Number of detected circles: {}".format(len(circles)))
# Shift circles by current offset and append index of this
# parameter set to all circles
if len(circles) > 0:
newcircles = np.hstack((circles, self.paramindex * np.ones((circles.shape[0], 1))))
self.allcircles = np.append(self.allcircles, newcircles, axis=0)
# OLD:
# All detected circles, EXCEPT THE ONES JUST DETECTED IN THIS
# RUN, should be removed for future calls to findcandidates
# NOW:
# All detected circles are removed from the gradient map for
# future calls to findcandidates
# return allcircles
logger.debug("Cleaning circle list...")
self.allcircles = self.cleancirclelist(self.allcircles)
logger.debug("Number of new circles: {}".format(len(self.allcircles) - firstnewcircle))
self.paramindex += 1
return [DiskInfo(c[0], c[1], c[2]) for c in self.allcircles[firstnewcircle:]]
def __call__(self, img, prev_detected, **params):
if "tiles" in params:
params["tiles_v"] = params["tiles"]
params["tiles_h"] = params["tiles"]
elif not ("tiles_v" in params and "tiles_h" in params):
logger.error(
(
"Invalid tiling information given to "
"TiledFCDProcessor. Provide either 'tiles' or both 'tiles_h' "
"and 'tiles_v'."
)
)
return []
# Copy given parameters and check for completeness
self.p.update(params)
if not self.all_params_set(params):
logger.critical("First FCD parameter set must be complete")
return []
if self.img is None:
self.img = np.copy(img)
if self.neighbourhood_max_img is None and self.p["mincenterlevel"] is not None:
self.neighbourhood_max_img = self.generic_filter(self.img, np.max, 3)
if self.prev_detected is None:
self.prev_detected = list(prev_detected) # copy
# Process
firstnewcircle = len(self.allcircles)
logger.debug("Preprocessing image...")
# try:
# import pickle
# gradcircles = pickle.load(open("testdata/circles.pickle_5tiles", 'r'))
# except IOError:
if True:
img_preproc = self.preprocess(self.img, self.p["gaussian"], self.p["sobel"])
logger.debug("Computing gradient...")
grads = self.tiled_gradients(
img_preproc, prev_detected, self.p["tiles_v"], self.p["tiles_h"], self.p["maxr"] + 3
)
gradcircles = []
for i, grad in enumerate(grads):
logger.debug("Tile {} / {}".format(i + 1, len(grads)))
logger.debug("Finding circle candidates...")
candidates = self.findcandidates(
grad,
self.p["alpha"],
self.p["beta"],
self.p["gamma"],
self.p["minnorm"],
self.p["maxr"],
self.p["mincenterlevel"],
)
logger.debug("Number of candidates: {}".format(len(candidates)))
logger.debug("Clustering...")
circles = self.cluster(
candidates,
self.p["minr"],
self.p["maxr"],
self.p["radiusscaler"],
self.p["minmembers"],
self.p["epsilon"],
self.p["minsamples"],
self.p["maxangspread"],
)
logger.debug("Number of detected circles: {}".format(len(circles)))
# Attach index of this tile to circles
circles = np.hstack((circles, i * np.ones((circles.shape[0], 1))))
gradcircles.append(circles)
# import pickle
# pickle.dump(gradcircles, open("testdata/circles.pickle", 'w'), -1)
logger.debug("Cleaning circle list...")
self.totmergers = 0
self.totoverl = 0
for i in range(self.p["tiles_v"] - 1):
for j in range(self.p["tiles_h"] - 1):
logger.debug(
"Circle group {} / {}".format(
i * (self.p["tiles_h"] - 1) + j + 1, (self.p["tiles_v"] - 1) * (self.p["tiles_h"] - 1)
)
)
tileindices = (
i * self.p["tiles_h"] + j,
i * self.p["tiles_h"] + j + 1,
(i + 1) * self.p["tiles_h"] + j,
(i + 1) * self.p["tiles_h"] + j + 1,
)
# Put circles of four-tile-groups into same list and clean
groupcircles = np.concatenate(tuple(gradcircles[ti] for ti in tileindices))
groupcircles = self.cleancirclelist(groupcircles)
# Split returned list back into corresponding gradcircles
for x in tileindices:
gradcircles[x] = groupcircles[groupcircles[:, -1] == x]
logger.debug("Total mergers: {}".format(self.totmergers))
logger.debug("Total overlaps: {}".format(self.totoverl))
newcircles = np.concatenate(gradcircles)
logger.debug("Number of new circles: {}".format(len(newcircles)))
self.allcircles = np.concatenate((self.allcircles, newcircles))
return [DiskInfo(c[0], c[1], c[2]) for c in self.allcircles[firstnewcircle:]]
def cleancirclelist(self, circles):
"""Return list containing no overlapping circles."""
# Sort circles by radius, largest to smallest
# circles = circles[circles[:,2].argsort()[::-1]]
removelist = []
# TODO: Might want to rewrite below using pdist (sparse distance matrix)
# https://stackoverflow.com/questions/5323818/condensed-matrix-function-to-find-pairs/14839010#14839010
dists = self.cdist(circles[:, :2], circles[:, :2])
# Get boolean matrix of circle pairs where distance is smaller than 10%
# of radius of first circle
mergecandidates = dists < 0.1 * circles[:, 2]
# Mirror along diagonal with logical or
mergecandidates = np.logical_or(mergecandidates, mergecandidates.T)
# Erase lower triangle and diagonal
mergecandidates = np.triu(mergecandidates, 1)
# Convert to indices
mergecandidates = np.transpose(np.where(mergecandidates))
# Get these where radii are roughly (< 10% difference) the same
mergecandidates = mergecandidates[
np.where(circles[mergecandidates[:, 0], 2] / circles[mergecandidates[:, 1], 2] > 0.90)
]
mergecandidates = mergecandidates[
np.where(circles[mergecandidates[:, 0], 2] / circles[mergecandidates[:, 1], 2] < 1.11)
]
logger.debug("{} mergers".format(len(mergecandidates)))
self.totmergers += len(mergecandidates)
# Merge remaining candidates
for c1_index, c2_index in mergecandidates:
c1, c2 = circles[c1_index], circles[c2_index]
c1[:3] = (c1[:3] * c1[3] + c2[:3] * c2[3]) / (c1[3] + c2[3])
if dists[c1_index, c2_index] > 0.5:
c1[3] += c2[3]
else:
# Probably duplicates from stitching our tiles
c1[3] = max(c1[3], c2[3])
c1[4] = min(c1[4], c2[4])
removelist.append(c2_index)
circles = np.delete(circles, removelist, axis=0)
dists = np.delete(dists, removelist, axis=0)
dists = np.delete(dists, removelist, axis=1)
removelist = []
# Similar to above, except now get all circles that overlap
overlaplist = dists - circles[:, 2] - np.matrix(circles[:, 2]).T < -1
overlaplist = np.triu(overlaplist, 1)
overlaplist = np.transpose(np.where(overlaplist))
logger.debug("{} overlaps".format(len(overlaplist)))
self.totoverl += len(overlaplist)
# Count number of occurences for each circle (no matter if c1 or c2)
counts = np.bincount(overlaplist.flat)
# Remove all circles that have two or more overlaps
while len(counts) > 0 and counts.max() > 1:
badcircle = counts.argmax()
removelist.append(badcircle)
# Remove all rows from overlaplist that contain badcircle
# http://stackoverflow.com/questions/11453141/
overlaplist = overlaplist[~(overlaplist == badcircle).any(axis=1)]
counts = np.bincount(overlaplist.flat)
# All remaining pairs are overlaps of only two circles
for c1_index, c2_index in overlaplist:
c1, c2 = circles[c1_index], circles[c2_index]
# Remove circle with fewer members
if c1[3] > c2[3]:
removelist.append(c2_index)
else:
removelist.append(c1_index)
return np.delete(circles, removelist, axis=0)
def loadconfig(self, configfile):
logger.debug("Loading configuration from '{}'".format(configfile))
# Lazy load yaml so we don't require it
if configfile.endswith('.yml') or configfile.endswith('.yaml'):
import yaml
with open(configfile, 'r') as f:
cfg = yaml.load(f)
else:
# FIXME: Assume JSON?
logger.critical("Unknown config file type")
raise NotImplementedError
# Set default modules if none given:
if not 'imgloaders' in cfg:
cfg['imgloaders'] = [
'fire.imageloaders.MahotasImageLoader',
]
if not 'preprocessors' in cfg:
cfg['preprocessors'] = {
'crop': 'fire.preprocessors.CropPreprocessor',
'makefloat': 'fire.preprocessors.MakeFloatPreprocessor',
'greyscale': 'fire.preprocessors.GreyscalePreprocessor',
'removebg': 'fire.preprocessors.RemoveBackgroundPreprocessor',
}
if not 'processors' in cfg:
cfg['processors'] = {
'threshold': 'fire.processors.ThresholdProcessor',
'watershed': 'fire.processors.WatershedProcessor',
'fcd': 'fire.processors.FCDProcessor',
'tiledfcd': 'fire.processors.TiledFCDProcessor',
'diskextend': 'fire.processors.DiskExtendProcessor',
'removeouter': 'fire.processors.RemoveOuterProcessor',
'dirtyremoveedges': 'fire.processors.DirtyRemoveEdgesProcessor',
}
if not 'exporters' in cfg:
cfg['exporters'] = {
'string': 'fire.exporters.StringExporter',
'save': 'fire.exporters.SaveExporter',
}
# Load and set config
for what in ('imgloaders', ):
instances = []
for modclass in cfg[what]:
modulename, classname = modclass.rsplit('.', 1)
mod = import_module(modulename)
instances.append(getattr(mod, classname)(manager = self))
setattr(self, what, instances)
for what in ('preprocessors', 'processors', 'exporters'):
instances = {}
for modname, modclass in cfg[what].items():
modulename, objectname = modclass.rsplit('.', 1)
mod = import_module(modulename)
obj = getattr(mod, objectname)
if isinstance(obj, type):
# obj is a class and should be initialised
instances[modname] = obj(manager = self)
else:
# Assume that obj is a function
instances[modname] = obj
setattr(self, what, instances)
for what in ('preprocsteps', 'procsteps', 'exportsteps'):
steplist = []
for rawstep in cfg[what]:
if isinstance(rawstep, dict):
stepname = rawstep.keys()[0]
steplist.append( (stepname, {} if rawstep[stepname] is None
else rawstep[stepname]) )
else:
steplist.append( (rawstep, {}) )
setattr(self, what, steplist)
def preprocess(self, img, preprocsteps):
for ppname, ppargs in preprocsteps:
logger.debug("Calling preprocessor '{}' with arguments: {}".format(
ppname, str(ppargs)))
img = self.preprocessors[ppname](img, **ppargs)
return img
