def svc (filename, parameters):
dataset, _, _ = prepare_data(filename, normalization=False)
np.random.shuffle(dataset)
model = SVC(C=parameters['regularization_strength'], kernel=parameters['kernel'])
fscores = []
print('SVC parameters: {}'.format(parameters))
for fold in range(folds):
cross_val_train, cross_val_test = cross_val_split(dataset, folds, fold)
cross_val_train_features, cross_val_train_labels = separate_features_labels(cross_val_train)
cross_val_test_features, cross_val_test_labels = separate_features_labels(cross_val_test)
model.fit(cross_val_train_features, cross_val_train_labels)
cross_val_predicted_labels = model.predict(cross_val_test_features)
fscore = f_score(cross_val_predicted_labels, cross_val_test_labels)
fscores.append(fscore)
print('Fold: {}. Cross-validation F-score: {}'.format(fold+1, fscore))
avg_fscore = np.mean(fscores)
print('Average fscore: {}'.format(avg_fscore))
return avg_fscore, parameters
def eval_classifier(classifier, x, y):
y_pred = classifier.predict(x)
conf = metrics.conf_matrix(y_pred, y)
accuracy = metrics.accuracy(y_pred, y)
precision = metrics.precision(y_pred, y)
recall = metrics.recall(y_pred, y)
f1_score = metrics.f_score(y_pred, y, beta=1)
avg_prec = np.mean(precision)
avg_rec = np.mean(recall)
avg_f1 = np.mean(f1_score)
print("Confusion Matrix: ")
print(conf)
print("Accuracy:")
print(accuracy)
print("Precision:")
print(precision)
print(f"Average Precision: {avg_prec}")
print("Recall:")
print(recall)
print(f"Average Recall: {avg_rec}")
print("F1_score:")
print(f1_score)
print(f"Average F1 Score: {avg_f1}")
def temporal_score(self, iou_list, video_clips, bg_class=0):
output_scores = self.__init_out_score_dict(iou_list)
for iou in iou_list:
confusion_mat = Dict(fp=0, tp=0, fn=0)
class_confusion_mat = Dict()
for c in range(self.num_classes):
class_confusion_mat[c] = Dict(fp=0, tp=0, fn=0)
for video_name, clip_list in video_clips.items():
clips = video_clips[video_name]
for c in range(self.num_classes):
targets = (np.array(clips.targets) == c)
predictions = (np.array(clips.predictions) == c)
tp1, fp1, fn1 = f_score(predictions,
targets,
iou,
bg_class=0)
class_confusion_mat[c].fp += fp1
class_confusion_mat[c].tp += tp1
class_confusion_mat[c].fn += fn1
tp1, fp1, fn1 = f_score(clips.predictions,
clips.targets,
iou,
bg_class=bg_class)
confusion_mat.tp += tp1
confusion_mat.fp += fp1
confusion_mat.fn += fn1
for c in range(self.num_classes):
output_scores["class_{}".format(c)]["iou_{:.2f}".format(
iou)] = calc_f1(class_confusion_mat[c].fn,
class_confusion_mat[c].fp,
class_confusion_mat[c].tp)
output_scores.overall["iou_{:.2f}".format(iou)] = calc_f1(
confusion_mat.fn, confusion_mat.fp, confusion_mat.tp)
return output_scores
def dice_loss(gt, pr, class_weights=1., smooth=SMOOTH, per_image=True, beta=1.):
r"""Dice loss function for imbalanced datasets:
.. math:: L(precision, recall) = 1 - (1 + \beta^2) \frac{precision \cdot recall}
{\beta^2 \cdot precision + recall}
Args:
gt: ground truth 4D keras tensor (B, H, W, C)
pr: prediction 4D keras tensor (B, H, W, C)
class_weights: 1. or list of class weights, len(weights) = C
smooth: value to avoid division by zero
per_image: if ``True``, metric is calculated as mean over images in batch (B),
else over whole batch
beta: coefficient for precision recall balance
Returns:
Dice loss in range [0, 1]
"""
return 1 - f_score(gt, pr, class_weights=class_weights, smooth=smooth, per_image=per_image, beta=beta)
results = []
skf = cross_validation.StratifiedKFold(y, n_folds=folds)
for train_index, test_index in skf:
train_X, test_X = data.iloc[train_index], data.iloc[test_index]
train_y, test_y = y.iloc[train_index], y.iloc[test_index]
clf = None
clf = RandomForestClassifier(n_estimators=n_estimators, criterion=criterion,
max_depth=max_depth, min_samples_split=min_samples_split,
n_jobs=n_processes)
clf.fit(train_X, train_y)
results.append(metrics.predict_table(clf, test_X, test_y))
result = pd.concat(results)
output = open(result_path + 'Arboles/Arbol.pkl', 'wb+')
pickle.dump(clf, output)
output.close()
result.to_csv(result_path + 'Predicciones/result.csv')
matrix = metrics.confusion_matrix(result)
matrix.to_csv(result_path + 'Metricas/soft_matrix_.csv')
clases = matrix.columns.tolist()
f_score = [metrics.f_score(matrix, c) for c in clases]
with open(result_path + 'Metricas/results.txt') as f:
f.write(clases + '\n')
f.write(str(f_score) + '\n')
def classValidation(self, epoch):
self.model.eval()
predictions = {}
targets = {}
tp, fp, fn = 0, 0, 0
with torch.no_grad():
progress_bar = tqdm(self.valLoader)
for step, (data, masks, anomaly, category, _,
clipNames) in enumerate(progress_bar):
if self.modelType == "mstcn":
anomaly = anomaly.view(-1)
clipNames = np.array(clipNames).reshape(-1).tolist()
if torch.cuda.is_available():
data = data.cuda().float()
anomaly = anomaly.cuda().float()
masks = masks.cuda().float()
outputs = self.model(data, masks)
loss = 0
for output in outputs:
loss += self.ceLoss(
output.transpose(2, 1).reshape(-1, 2), anomaly.long())
outputs = outputs[-1].transpose(2, 1).reshape(-1,
2).cpu().numpy()
anomaly = anomaly.cpu().numpy().flatten().tolist()
if step % 10 == 0:
progress_bar.set_description(
"Val [{}]:[{}/{}] Loss: {:.2f}".format(
epoch, step, self.valLoader.__len__(),
loss.item()))
for clipName, prediction, target in zip(
clipNames, outputs, anomaly):
predictions[clipName] = prediction
targets[clipName] = target
videoClips = self.valLoader.dataset.__getVideoClips__()
for videoName, clipList in tqdm(videoClips.items()):
clipPredictions = []
clipTargets = []
for clipName in clipList:
clipPredictions.append(predictions[clipName])
clipTargets.append(targets[clipName])
clipPredictions = np.argmax(np.array(clipPredictions), axis=1)
utils.visualizeTemporalPredictions(clipPredictions,
clipTargets, self.expFolder,
videoName)
tp1, fp1, fn1 = f_score(clipPredictions,
clipTargets,
0.1,
bg_class=-1)
tp += tp1
fp += fp1
fn += fn1
f1, precision, recall = calc_f1(fn, fp, tp)
print('F1@%0.2f-%0.2f : %.4f, TP: %.4f, FP: %.4f, FN: %.4f' %
(0.1, 0.5, f1, tp, fp, fn))
self.writer.add_scalar("Eval/F1_0.10-%0.2f" % 0.5, f1,
self.stepCounter)
self.writer.add_scalar("Confusion/%0.2f/TP_0.10" % 0.5, tp,
self.stepCounter)
self.writer.add_scalar("Confusion/%0.2f/FP_0.10" % 0.5, fp,
self.stepCounter)
self.writer.add_scalar("Confusion/%0.2f/TP_0.10" % 0.5, fn,
self.stepCounter)
return f1
def binaryValidation(self, epoch):
self.model.eval()
anomalyPredictions = []
anomalyTargets = []
predictions = {}
targets = {}
thresholds = [0.5, 0.75, 0.9]
IOUs = [0.1, 0.25, 0.5]
score = 0
with torch.no_grad():
progress_bar = tqdm(self.valLoader)
for step, (data, masks, anomaly, category, _,
clipNames) in enumerate(progress_bar):
if self.modelType == "tcn" or self.modelType == "mstcn" or self.modelType == "mcbtcn":
anomaly = anomaly.view(-1)
clipNames = np.array(clipNames).reshape(-1).tolist()
if torch.cuda.is_available():
data = data.float().cuda()
anomaly = anomaly.float().cuda()
masks = masks.float().cuda()
if self.modelType == "mstcn":
outputs = self.model(data, masks)
outputs = outputs[-1].view(-1)
elif self.modelType == "mcbtcn":
classOutputs, binaryOutputs = self.model(data, masks)
outputs = binaryOutputs[-1].view(-1)
else:
outputs = self.model(data)
mask = (anomaly != self.maskValue).nonzero().squeeze().cpu()
outputs = outputs[mask]
clipNames = np.array(clipNames)[mask].tolist()
anomaly = anomaly[mask]
loss = self.mseLoss(outputs.squeeze(), anomaly)
outputs = outputs.reshape(-1).cpu().numpy().tolist()
anomaly = anomaly.cpu().numpy().flatten().tolist()
anomalyTargets += anomaly
anomalyPredictions += outputs
if step % 10 == 0:
progress_bar.set_description(
"Val [{}]:[{}/{}] Loss: {:.2f}".format(
epoch, step, self.valLoader.__len__(),
loss.item()))
for clipName, prediction, target in zip(
clipNames, outputs, anomaly):
if clipName not in predictions:
predictions[clipName] = []
if clipName not in targets:
targets[clipName] = []
predictions[clipName].append(prediction)
targets[clipName].append(target)
videoClips = self.valLoader.dataset.__getVideoClips__()
for iou in IOUs:
for s, threshold in enumerate(thresholds):
tp, fp, fn = 0, 0, 0
normal = {"tp": 0, "fp": 0, "fn": 0}
abnormal = {"tp": 0, "fp": 0, "fn": 0}
for videoName, clipList in tqdm(videoClips.items()):
clipPredictions = []
clipTargets = []
for clipName in clipList:
clipPredictions.append(
np.mean(np.array(predictions[clipName])))
clipTargets.append(
np.mean(np.array(targets[clipName])))
# if "Assault010_x264" in videoName:
# auc_score = sklrn.roc_auc_score(clipTargets, clipPredictions)
# utils.visualizeHeatMapPredictions(clipPredictions, clipTargets, self.expFolder, videoName)
# print("AUC Score of selected video: {}".format(auc_score))
clipPredictions = (
np.array(clipPredictions) >
threshold).astype("float32").tolist()
if iou == 0.25 and threshold == 0.5:
utils.visualizeTemporalPredictions(
clipPredictions, clipTargets, self.expFolder,
videoName)
tp1, fp1, fn1 = f_score(clipPredictions,
clipTargets,
iou,
bg_class=0)
abnormal["tp"] += tp1
abnormal["fp"] += fp1
abnormal["fn"] += fn1
tp1, fp1, fn1 = f_score(clipPredictions,
clipTargets,
iou,
bg_class=1)
normal["tp"] += tp1
normal["fp"] += fp1
normal["fn"] += fn1
if self.noNormalSegmentation:
tp1, fp1, fn1 = f_score(clipPredictions,
clipTargets,
iou,
bg_class=0)
else:
tp1, fp1, fn1 = f_score(clipPredictions,
clipTargets,
iou,
bg_class=-1)
# if "Assault010_x264" in videoName:
# precision = tp1 / float(tp1 + fp1 + 1e-10)
# recall = tp1 / float(tp1 + fn1 + 1e-10)
# f1 = 2.0 * (precision * recall) / (precision + recall + 1e-10)
# print("F1 Score of selected video: {}".format(f1))
tp += tp1
fp += fp1
fn += fn1
a_f1, a_precision, a_recall = calc_f1(
abnormal["fn"], abnormal["fp"], abnormal["tp"])
print(
'Abnormal F1@%0.2f-%0.2f : %.4f, Precision: %.4f, Recall: %.4f'
% (iou, threshold, a_f1, a_precision * 100,
a_recall * 100))
n_f1, n_precision, n_recall = calc_f1(
normal["fn"], normal["fp"], normal["tp"])
print(
'Normal F1@%0.2f-%0.2f : %.4f, Precision: %.4f, Recall: %.4f'
% (iou, threshold, n_f1, n_precision * 100,
n_recall * 100))
f1, precision, recall = calc_f1(fn, fp, tp)
if iou == 0.25 and threshold == 0.5:
score = f1
print(
'F1@%0.2f-%0.2f : %.2f, TP: %.2f, FP: %.2f, FN: %.2f' %
(iou, threshold, f1, tp, fp, fn))
# print('Precision@%0.2f-%0.2f : %.2f, Recall@%0.2f-%0.2f: %.2f' % (iou, threshold, precision * 100,
# iou, threshold, recall * 100))
if self.writer is not None:
self.writer.add_scalar(
"Eval/F1_%0.2f-%0.2f" % (iou, threshold), f1,
self.stepCounter)
self.writer.add_scalar(
"Confusion/TP_%0.2f-%0.2f" % (iou, threshold), tp,
self.stepCounter)
self.writer.add_scalar(
"Confusion/FP_%0.2f-%0.2f" % (iou, threshold), fp,
self.stepCounter)
self.writer.add_scalar(
"Confusion/FN_%0.2f-%0.2f" % (iou, threshold), fn,
self.stepCounter)
fpr, tpr, _ = sklrn.roc_curve(anomalyTargets, anomalyPredictions)
rocAUC = sklrn.auc(fpr, tpr)
if self.writer is not None:
self.writer.add_scalar("Eval/AUC", rocAUC, self.stepCounter)
print('AUC Score %0.2f' % (rocAUC * 100))
return score
x_values = {clase: [] for clase in clases}
valores_fscore = {clase: [] for clase in clases}
result = result.sort('trust', axis=0)
for i in xrange(100):
# Obtengo las predicciones con una confianza mayor a cierto umbral
trust_threshold = float(i)/100
result = result[result['trust'] > trust_threshold]
# matrix = metrics.hard_matrix(result)
matrix = metrics.confusion_matrix(result)
# Si el f_score es menor que cero, es porque no habian datos que superaran tal nivel de confianza
f_scores = {clase: metrics.f_score(matrix, clase) for clase in clases}
for clase in clases:
if f_scores[clase] >= 0:
valores_fscore[clase].append(f_scores[clase])
x_values[clase].append(trust_threshold)
for clase in clases:
x_list = x_values[clase]
y_list = valores_fscore[clase]
plt.figure(clase)
plt.plot( x_list, y_list, '-ob')
plt.ylim(0.0, 1.0)
plt.xlim(0.0, 1.0)
criterion='entropy',
max_depth=14,
min_samples_split=20,
n_jobs=2)
clf.fit(train_X, train_y)
results.append(metrics.predict_table(clf, test_X, test_y))
result = pd.concat(results)
matrix = metrics.confusion_matrix(result)
clases = matrix.columns.tolist()
precisions = [metrics.precision(matrix, c) for c in clases]
recalls = [metrics.recall(matrix, c) for c in clases]
f_scores = [metrics.f_score(matrix, c) for c in clases]
w_score = metrics.weighted_f_score(matrix)
# f = open(result_dir + str(max_depth) + ' ' + str(min_samples_split) + '.txt', 'w')
f = open(result_dir + str(p) + '.txt', 'w')
f.write('F_score by class')
f.write('\n')
f.write(str(f_scores))
f.write('\n')
f.write('\n')
f.write('Weighted average: ')
f.write(str(w_score))
f.close()
# Para cada porcentaje de confianza
for i in xrange(100):
# Obtengo las predicciones con una confianza mayor a cierto umbral
porcentaje = float(i) / 100
aux = result[result['trust'] > porcentaje]
# matrix = metrics.confusion_matrix(aux)
matrix = metrics.hard_matrix(aux)
# Si la precision es menor que cero, es porque no habian datos que superaran tal nivel de confianza
precision = metrics.accuracy(matrix, clase)
if precision >= 0:
valores_accuracy.append(precision)
valores_recall.append(metrics.recall(matrix, clase))
x_values.append(porcentaje)
# Si el f_score es menor que cero, es porque no habian datos que superaran tal nivel de confianza
f_score = metrics.f_score(matrix, clase)
if f_score >= 0:
valores_fscore.append(f_score)
x_values_fscore.append(porcentaje)
#graf(clase, x_values, valores_accuracy, 'Accuracy')
graf(clase, x_values, valores_recall, 'Recall')
#graf(clase, x_values_fscore, valores_fscore, 'F-Score')
print 'a'
plt.show()
# Trees initialisation
tree_full = DecisionTreeClassifier()
mean_acc, std_dev_acc = \
metrics.k_cross_val(tree_full, x_train, y_train, k=10, seed=42)
# Q3.2
print('Q3.2')
print(mean_acc, std_dev_acc)
y_pred = tree_full.predict(x_test)
test_accuracy = metrics.accuracy(y_pred, y_test)
test_precision = metrics.precision(y_pred, y_test)
test_recall = metrics.recall(y_pred, y_test)
test_f_score = metrics.f_score(y_pred, y_test)
labels, confusion_matrix = metrics.conf_matrix(y_pred, y_test)
# Q3.3
print('Q3.3')
print(labels)
print(confusion_matrix)
print('Test acc:', test_accuracy)
print('Test precision:', test_precision)
print('Test recall:', test_recall)
print('Test f1 score:', test_f_score)
print('Average test recall:', metrics.avg_recall(y_pred, y_test))
print('Average test precision:', metrics.avg_precision(y_pred, y_test))
print('Average test f1-score:', metrics.avg_f_score(y_pred, y_test))
# Para cada porcentaje de confianza for i in xrange(100): # Obtengo las predicciones con una confianza mayor a cierto umbral porcentaje = float(i)/100 aux = result[result['trust'] > porcentaje] # matrix = metrics.confusion_matrix(aux) matrix = metrics.hard_matrix(aux) # Si la precision es menor que cero, es porque no habian datos que superaran tal nivel de confianza precision = metrics.accuracy(matrix, clase) if precision >= 0: valores_accuracy.append(precision) valores_recall.append(metrics.recall(matrix, clase)) x_values.append(porcentaje) # Si el f_score es menor que cero, es porque no habian datos que superaran tal nivel de confianza f_score = metrics.f_score(matrix, clase) if f_score >= 0: valores_fscore.append(f_score) x_values_fscore.append(porcentaje) #graf(clase, x_values, valores_accuracy, 'Accuracy') graf(clase, x_values, valores_recall, 'Recall') #graf(clase, x_values_fscore, valores_fscore, 'F-Score') print 'a' plt.show()
x_values = {clase: [] for clase in clases}
valores_fscore = {clase: [] for clase in clases}
result = result.sort('trust', axis=0)
for i in xrange(100):
# Obtengo las predicciones con una confianza mayor a cierto umbral
trust_threshold = float(i) / 100
result = result[result['trust'] > trust_threshold]
# matrix = metrics.hard_matrix(result)
matrix = metrics.confusion_matrix(result)
# Si el f_score es menor que cero, es porque no habian datos que superaran tal nivel de confianza
f_scores = {clase: metrics.f_score(matrix, clase) for clase in clases}
for clase in clases:
if f_scores[clase] >= 0:
valores_fscore[clase].append(f_scores[clase])
x_values[clase].append(trust_threshold)
for clase in clases:
x_list = x_values[clase]
y_list = valores_fscore[clase]
plt.figure(clase)
plt.plot(x_list, y_list, '-ob')
plt.ylim(0.0, 1.0)
plt.xlim(0.0, 1.0)
# Find predictions for each folds
predictions = []
for tree in trees:
prediction = tree.predict(x_test)
predictions.append(prediction)
# Combine the predictions and get mode
predictions = np.array(predictions)
mode = stats.mode(predictions)[0].flatten()
# print('mode = ', mode)
test_accuracy = metrics.accuracy(mode, y_test)
test_precision = metrics.precision(mode, y_test)
test_recall = metrics.recall(mode, y_test)
test_f_score = metrics.f_score(mode, y_test)
labels, confusion_matrix = metrics.conf_matrix(mode, y_test)
print('Q3.4')
print(labels)
print(confusion_matrix)
print('Test acc:', test_accuracy)
print('Test precision:', test_precision)
print('Test recall:', test_recall)
print('Test f1 score:', test_f_score)
print('Average test recall:', metrics.avg_recall(mode, y_test))
print('Average test precision:', metrics.avg_precision(mode, y_test))
print('Average test f1-score:', metrics.avg_f_score(mode, y_test))
print('mode accuracy = ', metrics.accuracy(mode, y_test))
