def predict(image_path, model, gpu, topk):
''' Predict the class (or classes) of an image using a trained deep learning model.
'''
device = torch.device(
"cuda" if torch.cuda.is_available() and gpu else "cpu")
model.eval()
model.to(device)
image = process_image(image_path)
inputs = image.unsqueeze_(0).to(device)
with torch.no_grad():
output = model.forward(inputs)
tensor_probs, tensor_labels = torch.topk(output, topk)
top_probs = tensor_probs.exp()
idx_to_class = {model.class_to_idx[key]: key for key in model.class_to_idx}
classes = list()
probs = top_probs.tolist()[0]
labels = tensor_labels.tolist()[0]
for label in labels:
classes.append(idx_to_class[label])
return probs, classes
def predict(image_path, model, topk, gpu_f):
''' Predict the class (or classes) of an image using a trained deep learning model.
Arguments
---------
image_path: Pathh to image
model: the pretrained model
topk: integer, number of class probabilities to be displayed
'''
# Prepare image
Tensor_image = process_image(image_path)
Tensor_image, device = hw_control(Tensor_image, gpu_f)
Tensor_image.unsqueeze_(0)
Tensor_image = Tensor_image.float()
with torch.no_grad():
# Put the model in evaluation mode
model.eval()
# Forward propagation through the model
output = model.forward(Tensor_image)
ps = torch.exp(output)
print(ps)
print(ps.max())
top_k_prob = ps.topk(topk)
#Make sure the module is back to training mode
model.train()
# Return the results as numpy arrays
probablities = top_k_prob[0][0].cpu().numpy()
classes = top_k_prob[1][0].cpu().numpy()
return probablities, classes
def main():
in_arg = get_input_args() # Creates and returns command line arguments
print('\nPath To Image:\n', in_arg.path_to_image, '\n', '\nCheckpoint:\n',
in_arg.checkpoint, '\n')
print('Optional Command Line Arguments:\n', 'Top K [--top_k]: ',
in_arg.top_k, '\n', 'Category Names [--category_names]: ',
in_arg.category_names, '\n', 'GPU [--gpu]: ', in_arg.gpu, '\n')
label_count, hidden_units, arch, class_to_idx, classifier_state_dict, epochs = mod.load_checkpoint(
in_arg.checkpoint, in_arg.gpu) # Load checkpoint
model = mod.build_model(label_count, hidden_units, arch,
class_to_idx) # Build model
model.classifier.load_state_dict(classifier_state_dict)
criterion = nn.NLLLoss()
image = util.process_image(in_arg.path_to_image) # Pre-process image
labels = util.get_labels(
in_arg.category_names) # Get dict of categories mapped to real names
mod.predict(image, model, labels, in_arg.top_k,
in_arg.gpu) # Prints Top K Labels and Probabilities
def predict(image_path, saved_model, top_k, category_names):
im = Image.open(image_path)
test_image = np.asarray(im)
processed_test_image = process_image(test_image)
processed_test_image = np.expand_dims(processed_test_image, axis=0)
load_model = tf.keras.models.load_model(
saved_model, custom_objects={'KerasLayer': hub.KerasLayer})
ps = load_model.predict(processed_test_image)
# top flower prediction
val, ind = tf.math.top_k(ps[0], k=1)
probs = list(val.numpy())
classes = list(ind.numpy())
print('top prediction class is :\n', classes)
print('top prediction label is :\n',
[category_names[str(n + 1)] for n in classes])
print('probability of it is :\n', probs)
# top k flower predictions
val, ind = tf.math.top_k(ps[0], k=top_k)
probs = list(val.numpy())
classes = list(ind.numpy())
print('classes of top k are:\n', classes)
print('labels of top k are:\n',
[category_names[str(n + 1)] for n in classes])
print('probabilities of top k are :\n', probs)
def model_prediction(image_path, model, topk, device):
if torch.cuda.is_available() and device == 'gpu':
model.to('cuda')
img = process_image(image_path)
img = img.unsqueeze_(0)
img = img.float()
if device == 'gpu':
with torch.no_grad():
output = model.forward(img.cuda())
else:
with torch.no_grad():
output = model.forward(img)
prob = torch.exp(output)
top_p, top_class = prob.topk(topk)
idx_to_class = {val: key for key, val in
model.class_to_idx.items()}
mapped_classes = list()
# print('TOP CLASS', top_class.cpu().numpy())
for label in top_class.cpu().numpy()[0]:
mapped_classes.append(idx_to_class[label])
return top_p, mapped_classes
def main():
parser.add_argument(
'image_dir',
action="store",
default=
"/home/workspace/ImageClassifier/flowers/test/10/image_07090.jpg")
parser.add_argument(
'checkpoint',
action="store",
default="/home/workspace/ImageClassifier/checkpoint.pth")
parser.add_argument('--top_k',
action="store",
dest="top_k",
type=int,
default=5)
parser.add_argument(
'--category_names',
action="store",
dest="classes_names",
default="/home/workspace/ImageClassifier/cat_to_name.json")
parser.add_argument('--gpu', action="store", dest="device", default="gpu")
p_args = parser.parse_args()
#gpu or cpu
device = torch.device("cpu")
if torch.cuda.is_available() and p_args.device == 'gpu':
device = torch.device("cuda:0")
#load the categories names
cat_names = ut.load_categories(p_args.classes_names)
#load the checkpoint
chkpoint = ut.load_checkpoint(p_args.checkpoint)
#configure the model
model = chkpoint['model']
model.load_state_dict(chkpoint['model_state'])
#process the image
image = ut.process_image(p_args.image_dir)
#predict
probs, classes = brain.predict(image, model, p_args.top_k, device)
#configure the probabilities and class names
probs = probs.cpu().numpy().flatten().tolist()
classes = classes.cpu().numpy().flatten().tolist()
index_to_class = {value: key for key, value in model.class_to_idx.items()}
print("\n\n\n\n{:30s}{:20s}".format("Class Name", " Probability"))
for i in range(len(classes)):
name = [cat_names[index_to_class[classes[i]]]][0]
probability = probs[i] * 100
print("{:30s}{:0.3f}".format(name, probability))
def main(args):
model = baseModel.Xception_Model(input_shape=(299, 299, 3),
batch_size=128,
num_classes=103,
trainable=False)
model.sumary()
model.load_model(args.model)
res_file = open(args.out, 'w')
res_file.write('id,predicted\n')
img_files, f_ids = util.list_imgs(args.data)
nb_sample = len(f_ids)
print("Number of test image: ", nb_sample)
nb_steps = int(np.ceil(len(f_ids) / args.batch_size))
error_ids = []
for step in range(nb_steps):
t_imgs, t_ids = [], []
print("Process with batch ", step)
for idx in range(args.batch_size):
if ((step * args.batch_size + idx) > nb_sample - 1):
break
# print("image: ", f_ids[step*args.batch_size + idx])
try:
t_img = util.process_image(img_files[step * args.batch_size +
idx])
# if (np.asarray(t_img).shape == (299,299,3)):
t_imgs.append(t_img)
t_ids.append(f_ids[step * args.batch_size + idx])
except:
print("Error: ", f_ids[step * args.batch_size + idx])
error_ids.append(f_ids[step * args.batch_size + idx])
continue
# res_file.write(f_ids[step*args.batch_size + idx]+'\n')
predicted_res = util.get_top_k_(model, np.squeeze(t_imgs))
for j, idn in enumerate(t_ids):
res_file.write(
str(idn) + ', ' + class_mapping[predicted_res[j][-1]] + ' ' +
class_mapping[predicted_res[j][-2]] + ' ' +
class_mapping[predicted_res[j][-3]] + '\n')
for err in error_ids:
res_file.write(
str(err) + ', ' + str(0) + ' ' + str(0) + ' ' + str(0) + '\n')
res_file.close()
print("Done....")
def main():
# Function to retrieve command line arguments entered by the user
in_arg = get_input_args()
#Load pre-trained model from checkpoint
model = load_checkpoint(in_arg.saved_checkpoint, in_arg.gpu)
#print(in_arg.saved_checkpoint)
#print(model)
# Process Image
processed_image = process_image(in_arg.image_path)
# Classify Prediction
top_probs, top_labels, top_flowers = predict(in_arg.image_path, model,
in_arg.category_names,
in_arg.top_k)
def predict(image_path, model_path, top_k=5, category_names=None):
"""
Returns a set prediction of what flower the given input image is,
ordered descending on predicted probability.
INPUTS
image_path: path to image file
model_path: path to saved prediction model. Assumes tensorflow model
top_k: top K predictions to return
category_names: Path to json mapping class numbers to flower names. If not specified,
the returned output only includes class numbers.
RETURNS
classes: Classes of predicted flowers in descending order based on probabilities.
Will be of integers if `category_names`is unspecified. Else, includes names of
predicted flowers.
probs: Proabilities of predicted classes in descending order.
"""
#process image from image_path
image = process_image(image_path)
#load the model from model_path
model = load_model(model_path)
#make predictions on the image with the model
ps = model.predict(image)
#sort indices from predictions descending based on probabilities
psi = np.argsort(-ps)
#get top K probabilities from classes
classes = psi[0][:top_k]
#use classes as indices to find the top K predictions
probs = np.take(ps, classes)
#adding 1 to index to get correct class values
classes += 1
#check if category names are specified and translate classes to class_names.
if (category_names):
class_names = open_json(category_names)
class_str = [str(x) for x in classes]
classes = [class_names.get(x) for x in class_str]
return classes, probs
def predict(image_path, model, category_names, topk):
#Predict the class (or classes) of an image using a trained deep learning model
# Code to predict the class from an image file
processed_image = process_image(image_path)
processed_image.unsqueeze_(0)
probs = torch.exp(model.forward(processed_image))
top_probs, top_labs = probs.topk(topk)
with open(category_names, 'r') as f:
cat_to_name = json.load(f)
idx_to_class = {}
for key, value in model.class_to_idx.items():
idx_to_class[value] = key
np_top_labs = top_labs[0].numpy()
top_labels = []
for label in np_top_labs:
top_labels.append(int(idx_to_class[label]))
top_flowers = [cat_to_name[str(lab)] for lab in top_labels]
top_probs = top_probs[0].detach().numpy() #converts from tensor to nparray
#print(top_flowers)
#print(top_probs)
#print(top_labels)
#print(topk)
#print('top flowers length')
#print(len(top_flowers))
#print(len(top_probs))
#printing out the top K classes along with associated probabilities
i = 0 # this prints out top k classes and probs as according to user
while i < topk:
print("{} with a probability of {}".format(top_flowers[i],
top_probs[i]))
#print("{} with a probability of {}".format(top_flowers[i]))
#print('top_probs: ', top_probs[i])
i += 1 # cycle through
return top_probs, top_labels, top_flowers
def predict(image_path, model, topk=args.top_k, device='cuda'):
''' Predict the class (or classes) of an image using a trained deep learning model.
'''
# TODO: Implement the code to predict the class from an image file
processed = utilities.process_image(image_path)
processed = torch.from_numpy(processed).type(torch.FloatTensor)
processed.unsqueeze_(0)
# send to cuda if selected
if args.gpu:
processed = processed.to(device)
log_output = model.forward(processed)
probs = torch.exp(log_output)
top_probs, top_labs = probs.topk(topk)[0].detach().cpu().numpy().tolist(
)[0], probs.topk(topk)[1].detach().cpu().numpy().tolist()[0]
inv_map = {v: k for k, v in model.class_to_idx.items()}
top_labs = [inv_map[top_labs[x]] for x in range(len(top_labs))]
print("Image Class: {}".format(top_labs))
print("Probability: {}".format(top_probs))
return top_probs, top_labs
def predict(image_path, model, topk):
"""
Predict the class (or classes) of an image using a trained deep learning model.
:param image_path:
:param model:
:param topk:
:return:
"""
image = Image.open(image_path)
image = process_image(image)
image_tensor = torch.from_numpy(image)
# refactor tensor shape to cope with model specification
image_tensor = image_tensor.view(1, *image_tensor.shape)
image_tensor = image_tensor.type(torch.FloatTensor)
with torch.no_grad():
model.eval()
output = model.forward(image_tensor)
probs = torch.exp(output)
class_probs, class_idx = probs.topk(topk, dim=1)
return class_probs, class_idx
def predict(image_path, model, topk):
''' Predict the class (or classes) of an image using a trained deep learning model.
'''
#Implement the code to predict the class from an image file
#turn off dropout
model.eval()
topk = in_arg.kclass
image = process_image(in_arg.imagefile)
image = torch.from_numpy(np.array([image])).float()
cuda = torch.cuda.is_available()
if in_arg.gpu == 'gpu' and cuda:
device = torch.device('cuda')
model.cuda()
FloatTensor = torch.cude.FloatTensor
else:
device = torch.device('cpu')
model.cpu()
FloatTensor = torch.FloatTensor
#feed forward
output = model.forward(image)
ps = torch.exp(output)
probs = torch.topk(ps, topk)[0].tolist()
index_k = torch.topk(ps, topk)[1].tolist()
idx_to_class = {value: key for key, value in model.class_to_idx.items()}
print('top {} probabilities:'.format(topk), probs)
#print('index-k:', index_k)
#correlate the top 5 indices with their categories
classes = []
for i in index_k[0]:
classes.append(idx_to_class[i])
return probs, classes
def predict(image_path, model, topk=top_k_var):
'''
Predict the class (or classes) of an image using a trained deep learning model.
'''
# Preprocess image
image = process_image(image_path)
# Convert to Torch Tensor
image = torch.from_numpy(image)
# Move tensor onto device
image = image.to(device)
# Convert input image to float to avoid RuntimeError: expected Double Tensor
image = image.float()
# Add batch dimension PyTorch is expecting
image.unsqueeze_(0)
# model.to(device)
model.eval()
with torch.no_grad():
output = model.forward(image)
# Our output is log_softmax, so we take the inverse (exp) to get back softmax distribution
all_probs = torch.exp(output)
# topk returns a tuple of (values, indices)
topk_tuple = torch.topk(all_probs, topk)
probs = topk_tuple[0]
classes = topk_tuple[1]
return probs, classes
def main():
in_arg = get_input_args()
# initiate the variables passed through command line
image_path = in_arg.image_path
checkpoint_path = in_arg.checkpoint_path
top_k = in_arg.top_k
category_names = in_arg.category_names
gpu = in_arg.gpu
# Correct the variables if necessary to avoid incorrect calculations
# Collect error messages what variables have been changed to what values
error_messages = []
if (top_k <= 0):
top_k = 1
error_messages.append("top_k was corrected to 1")
elif (top_k > 5):
top_k = 5
error_messages.append("top_k was corrected to 5")
if path.isfile(image_path) and path.isfile(
checkpoint_path) and path.isfile(
category_names): # check if all files are existing
# load the categoy names file which connects category indices with indices predicted by the model
with open(category_names, 'r') as f:
cat_to_name = json.load(f)
# use the folder of the specified file as category index
title_idx = image_path.split("/")[-2]
# find the name by matching the category index with the indices in the category names file
img_label = [v for k, v in cat_to_name.items() if k == title_idx]
img_label = img_label[0]
print(f"Image label: {img_label}")
# use GPU power if available for prediction
if gpu:
device = torch.device(
"cuda" if torch.cuda.is_available() else "cpu")
else:
device = "cpu"
# load the model from the specified classifier path
model = load_model(checkpoint_path)
model = model.to(device)
# freeze all model parameters to save speed and put model
for param in model.parameters():
param.requires_grad = False
# switch to evaluation mode
model.eval()
# prepare the specified image so that it can be used by the model
img = process_image(image_path)
img = img[None, :, :, :]
img = img.float()
img = img.to(device)
# deactive all gradients to further speed up the performance and calculate the log prob outputs
with torch.no_grad():
logps = model.forward(img)
# convert to probability values
ps = torch.exp(logps)
# save the top probabilities and their category indices
top_p, top_class = ps.topk(top_k, dim=1)
top_p = np.array(top_p).reshape(top_k)
top_class = np.array(top_class)
# find the the category indices for the predicted top indices
top_classes = [
k for k, v in model.class_to_idx.items() if v in top_class
]
# match the top category indices with their category names
names = [cat_to_name[v] for v in top_classes if v in cat_to_name]
for i, name in enumerate(names):
print(f"{name}: ..... {format(top_p[i],'.2f')}")
else:
print("Incorrect paths to files - please check!")
# print out error messages if any
if (len(error_messages)):
for v in error_messages:
print(v)
from network import Network
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
parser_sec = argparse.ArgumentParser()
parser_sec.add_argument('b_img_path', action='store') # image path
parser_sec.add_argument('checkpoint', action='store') # checkpoint file
parser_sec.add_argument('--top_k', nargs='?', type=int)
parser_sec.add_argument('--category_names', nargs='?')
parser_sec.add_argument('--gpu', action='store_true')
args = parser_sec.parse_args()
args = vars(args)
arg_sec_inputs = []
for key, value in args.items():
arg_sec_inputs.append(value)
if arg_sec_inputs[3] is None:
arg_sec_inputs[3] = 'cat_to_name.json'
with open(arg_sec_inputs[3], 'r') as f:
cat_to_name = json.load(f)
Network.model = utilities.load_checkpoint('saves/mycheckpoint.pth')
image = utilities.process_image(arg_sec_inputs[0])
utilities.predict_image(image, Network.model, True, cat_to_name,
arg_sec_inputs[2])