def dataset_preprocess():
#Loading MNIST dataset
# global train_images
global train_labels
# global test_images
global test_labels
global train_images_preprocessed
global test_images_preprocessed
global vector_size
train_images = load_train_images()
train_labels = load_train_labels()
test_images = load_test_images()
test_labels = load_test_labels()
##pattern parameter
input_threshold = 127 # the binary threshold of input pattern
sample = preprocess(train_images[0], input_threshold)
vector_size = size(sample)
train_images_preprocessed = np.zeros((60000, vector_size), dtype=bool_)
test_images_preprocessed = np.zeros((10000, vector_size), dtype=bool_)
for n in range(0, 60000):
train_images_preprocessed[n] = preprocess(train_images[n],
input_threshold)
print 'preprocess train_image done'
for n in range(0, 10000):
test_images_preprocessed[n] = preprocess(test_images[n],
input_threshold)
print 'preprocess test_image done'
del train_images, test_images
def run():
train_images = load_train_images()
train_labels = load_train_labels()
test_images = load_test_images()
# test_labels = load_test_labels()
Batch_num = 600
Sample_num = 60000
Epoch_N = 3
Gw = mat(zeros((784, 10)))
sequence_in = np.random.permutation(Sample_num)
for Epoch in range(0, Epoch_N):
print Epoch
for n_batch in range(0, Sample_num / Batch_num - 1):
for n_sample in range(n_batch * Batch_num,
(n_batch + 1) * Batch_num - 1):
input_sample = mat(train_images[sequence_in[n_sample]])
input_label = int(mat(train_labels[sequence_in[n_sample]]))
input_sample = test_images[1].reshape(784, order='c')
input_sample = (input_sample > 0.5).astype(
np.int_) # binaryzation
output_neuron = input_sample * Gw
fired_neuron = int(np.argmax(output_neuron))
if fired_neuron != input_label:
input_sample = input_sample.reshape(-1, 1)
Gw[:,
input_label] = input_sample * 0.1 + Gw[:, input_label]
def dataset_preprocess():
#Loading MNIST dataset
# global train_images
# global train_labels
## global test_images
# global test_labels
# global train_images_preprocessed
# global test_images_preprocessed
# global vector_size
train_images = load_train_images()
train_labels = load_train_labels()
test_images = load_test_images()
test_labels = load_test_labels()
##pattern parameter
input_threshold = 127 # the binary threshold of input pattern
sample = preprocess(train_images[0], input_threshold)
vector_size = size(sample)
train_images_preprocessed = np.zeros((60000, vector_size))
test_images_preprocessed = np.zeros((10000, vector_size))
for n in range(0, 60):
train_images_preprocessed[n] = preprocess(train_images[n],
input_threshold)
print 'preprocess train_image done'
for n in range(0, 10):
test_images_preprocessed[n] = preprocess(test_images[n],
input_threshold)
print 'preprocess test_image done'
del train_images
del test_images
filename = 'train_images_preprocessed_8kernels.txt'
f = open(filename, 'wb')
pickle.dump(train_images_preprocessed, f)
f.close()
filename = 'test_images_preprocessed_8kernels.txt'
f = open(filename, 'wb')
pickle.dump(test_images_preprocessed, f)
f.close()
filename = 'vector_size.txt'
f = open(filename, 'wb')
pickle.dump(vector_size, f)
f.close()
print 'save done'
del train_images_preprocessed
del test_images_preprocessed
def dataset_preprocess():
#Loading MNIST dataset
# global train_images
# global train_labels
## global test_images
# global test_labels
# global train_images_preprocessed
# global test_images_preprocessed
# global vector_size
train_images = load_train_images()
train_labels = load_train_labels()
test_images = load_test_images()
test_labels = load_test_labels()
##pattern parameter
input_threshold = 127 # the binary threshold of input pattern
sample = preprocess(train_images[0], input_threshold)
vector_size = size(sample)
train_images_preprocessed = np.zeros((60000, vector_size))
test_images_preprocessed = np.zeros((10000, vector_size))
for n in range(0, 60):
train_images_preprocessed[n] = preprocess(train_images[n],
input_threshold)
print 'preprocess train_image done'
for n in range(0, 10):
test_images_preprocessed[n] = preprocess(test_images[n],
input_threshold)
print 'preprocess test_image done'
del train_images
del test_images
filename = 'processed_8kernels.db'
f = shelve.open(filename)
f['train'] = train_images_preprocessed
f['train_label'] = train_labels
f['test'] = test_images_preprocessed
f['test_label'] = test_labels
f['vector_size'] = vector_size
f.close()
print 'image save done'
del train_images_preprocessed
del test_images_preprocessed
m = size(image_pool_1) + size(image_pool_2) + size(image_pool_3)
n = size(image_pool_1) + size(image_pool_2) + size(image_pool_3) + size(
image_pool_4)
image_vector[m:n] = image_pool_4.reshape(size(image_pool_4), order='c')
return image_vector
#%%
def run():
input_threshold = 127 # the binary threshold of input pattern
a = preprocess(train_images[0], input_threshold)
print a
#%%
if __name__ == '__main__':
#%%
#Loading MNIST dataset
global train_images
global train_labels
global test_images
global test_labels
train_images = load_train_images()
train_labels = load_train_labels()
test_images = load_test_images()
test_labels = load_test_labels()
#%%
run()
def run():
train_images = load_train_images()
train_labels = load_train_labels()
test_images = load_test_images()
test_labels = load_test_labels()
'''Simulation parameter setting'''
Batch_num = 600
Sample_num = 60000
Epoch_N = 4
Batch_N = Sample_num / Batch_num * Epoch_N
'''Synapses array initialization '''
Gw_L1 = np.random.uniform(0.14, 0.16, [784, 100]) # initializing synapses of the first layer
Gw_L2 = zeros((100, 10)) # initializing synapses of the second layer
'''Neurons initialization'''
vth_neuron_l1 = 15*ones(100)
vth_min = 0.1
vth_max = 100
Acc = zeros(Batch_N)
'''Data pre-processing and Training'''
for Epoch in range(0, Epoch_N):
sequence_in = np.random.permutation(Sample_num) # Generate the random sequence of trainning pattern input
if Epoch == 1:
print Epoch
# training in a batch
for Batch in range(0, Sample_num/Batch_num):
# trainning
for n in range(Batch*Batch_num, (Batch+1)*Batch_num):
input_sample = train_images[sequence_in[n]]/255
input_label = train_labels[sequence_in[n]]
'''sort'''
input_sample = input_sample.reshape(784, order='c') # reshape the data array from 28*28 to 784*1
sort_input_temp = np.argsort(-input_sample, 0)
threshold_input_num = sort_input_temp[100]
threshold_input = input_sample[threshold_input_num] # find the threshold of the pixel value as active
'''Binaryzation'''
# input_sample = (input_sample > 0.5) * 1 + (input_sample <= 0.5) * (-0.1) # binaryzation
input_sample = (input_sample > threshold_input) * 1 + (input_sample <= threshold_input) * (-0.1) # binaryzation
'''Dot production'''
neuron_L1_signal = np.dot(input_sample, Gw_L1) # calculation
neuron_fire_l1 = (neuron_L1_signal >= vth_neuron_l1) * 1 + (neuron_L1_signal < vth_neuron_l1) * (-0.1)
# choose fired neurons of layer 1, as the input pattern of the 2nd layer
for num_of_neuron in range(0, 100):# change the threshold of neurons
temp_vth_neuron_l1 = vth_neuron_l1[num_of_neuron]
if neuron_fire_l1[num_of_neuron] != 1:
temp_vth_neuron_l1 *= 0.9
if temp_vth_neuron_l1 > vth_max:
temp_vth_neuron_l1 = 1
else:
temp_vth_neuron_l1 *= 1.1
if temp_vth_neuron_l1 < vth_min:
temp_vth_neuron_l1 = 0.1
vth_neuron_l1[num_of_neuron] = temp_vth_neuron_l1
'''Weight change'''
for label_input in range(0, 784):
if input_sample[label_input] == 1:
for label_output in range(0, 100):
if neuron_fire_l1[label_output] == 1:
W0 = Gw_L1[label_input, label_output]
# weight_change = ap*exp(-bp*W0)
weight_change = 0.1
W1 = W0 + weight_change
if W1 > 1:
W1 = 1
Gw_L1[label_input, label_output] = W1
'forgetting during a sample'
Gw_L1 *= 0.99999999
'''Layer-2'''
input_L2 = neuron_fire_l1
neuron_L2_signal = np.dot(input_L2, Gw_L2)
neuron_L2_sort = np.argsort(-neuron_L2_signal, 0)
neuron_num_L2 = neuron_L2_sort[0]
'''weight change'''
if neuron_num_L2 != input_label:
for label_input_l2 in range(0, 100):
if input_L2[label_input_l2] == 1:
W0 = Gw_L2[int(label_input_l2), int(input_label)]
# weight_change = ap*exp(-bp*W0)
weight_change = 0.1
W1 = W0 + weight_change
if W1 > 1:
W1 = 1
Gw_L2[int(label_input_l2), int(input_label)] = W1
Gw_L2 *= 0.99999999
'''Accuracy Rate Test'''
correct = snn_2layer_test(test_images, test_labels, Gw_L1, Gw_L2, vth_neuron_l1)
print correct
# Acc[Batch + Epoch * (Sample_num / Batch_num)] = snn_2layer_test(test_images, test_labels, Gw_L1_A, Gw_L1_B, Gw_L1_C, Gw_L1_D, Gw_L1_E, Gw_L2)
Gw_L1 *= 0.999
Gw_L2 *= 0.999