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svm_origin.py
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##
## Created by Liu Deyuan on 2021/01/15.
##
import cv2
import time
import numpy as np
from sklearn import svm
from sklearn.metrics import accuracy_score, f1_score
from hog_origin import feature_extraction
def enhance_data(X):
for i in range(X.shape[0]):
image = np.array(X[i], np.float32)
r = np.random.randint(0, 4)
rotate_flags = [-1, cv2.ROTATE_90_CLOCKWISE, cv2.ROTATE_180, cv2.ROTATE_90_COUNTERCLOCKWISE]
flag = rotate_flags[r]
if flag != -1:
image = cv2.rotate(image, flag)
image = cv2.resize(image, dsize=(400, 300), interpolation=cv2.INTER_LINEAR)
X[i] = np.array(image, np.float16)
return X
def load_data():
k1 = ['dataset/data_float16_v1.npz', 'dataset/data_float16_v3.npz', 'dataset/data_float16_v4.npz']
oppo = ['dataset/data_float16_v5.npz', 'dataset/data_float16_v6.npz', 'dataset/data_float16_v7.npz']
files = []
files.extend(oppo)
X_train_all, X_test_all, y_train_all, y_test_all = [], [], [], []
for file in files:
data = np.load(file)
X_train, X_test, y_train, y_test = data['X_train'], data['X_test'], data['y_train'], data['y_test']
X_train_all.append(X_train)
X_test_all.append(X_test)
y_train_all.append(y_train)
y_test_all.append(y_test)
X_train_all = np.concatenate(X_train_all)
X_test_all = np.concatenate(X_test_all)
y_train_all = np.concatenate(y_train_all)
y_test_all = np.concatenate(y_test_all)
X_train_all = enhance_data(X_train_all)
X_test_all = enhance_data(X_test_all)
return X_train_all, X_test_all, y_train_all, y_test_all
def analysis_result(label, predict, time):
print(f'{time:.6f}s for {label.shape[0]} samples predict')
print(f'{np.sum(label > 0)} positive classes')
print(f'accuracy_score: {accuracy_score(label, predict)}')
print(f'accuracy_number: {int(accuracy_score(label, predict, normalize=False))}/{len(label)}')
print(f'f1_score: {f1_score(label, predict, average=None)}')
print()
if __name__ == "__main__":
# (1)读取数据
X_train, X_test, y_train, y_test = load_data()
# (2)提取数据特征
print('Begin Feature Extraction')
start_time = time.time()
X_train_feature = feature_extraction(X_train)
end_time = time.time()
print(f'{end_time - start_time:.6f}s for {y_train.shape[0]} samples feature extraction')
print()
start_time = time.time()
X_test_feature = feature_extraction(X_test)
end_time = time.time()
print(f'{end_time - start_time:.6f}s for {y_test.shape[0]} samples feature extraction')
print()
# (3)创建SVM模型
print('Begin SVM')
clf = svm.SVC() # 默认kernel为rbf，测试代码仅支持kernel为rbf
# (4)训练SVM模型
clf.fit(X_train_feature, y_train)
# (5)保存SVM模型参数
LIBSVM_IMPL = ["c_svc", "nu_svc", "one_class", "epsilon_svr", "nu_svr"]
print('X_test_feature', X_test_feature.shape)
print('self.support_', clf.support_.shape, clf.support_)
print('self.support_vectors_', clf.support_vectors_.shape, np.array(clf.support_vectors_, dtype=np.float16))
print('self._n_support', clf._n_support)
print('self._dual_coef_', clf._dual_coef_.shape, np.array(clf._dual_coef_, dtype=np.float16))
print('self._intercept_', np.array(clf._intercept_, dtype=np.float16))
print('self._probA', clf._probA)
print('self._probB', clf._probB)
print('svm_type', LIBSVM_IMPL.index(clf._impl))
print('kernel', clf.kernel)
print('self.degree', clf.degree)
print('self.coef0', np.float16(clf.coef0))
print('self.gamma', np.float16(clf._gamma))
print('self.cache_size', clf.cache_size)
print()
np.savez('model/params.npz', support = clf.support_, SV = np.array(clf.support_vectors_, dtype=np.float16), nSV = clf._n_support,
sv_coef = np.array(clf._dual_coef_, dtype=np.float16), intercept = np.array(clf._intercept_, dtype=np.float16), svm_type = LIBSVM_IMPL.index(clf._impl),
kernel = clf.kernel, degree = clf.degree, gamma = np.float16(clf._gamma), coef0 = np.float16(clf.coef0))
print(clf.break_ties, clf.decision_function_shape, len(clf.classes_), clf._sparse, callable(clf.kernel))
print()
save_path = 'model/bin/'
clf.support_.tofile(save_path+'01_support_int32.bin')
clf.support_vectors_.astype(np.float32).tofile(save_path+'02_SV_float32.bin')
clf._n_support.tofile(save_path+'03_nSV_int32.bin')
clf._dual_coef_.astype(np.float32).tofile(save_path+'04_sv_coef_float32.bin')
clf._intercept_.astype(np.float32).tofile(save_path+'05_intercept_float32.bin')
np.array(LIBSVM_IMPL.index(clf._impl)).astype(np.float32).tofile(save_path+'06_svm_type_float32.bin')
np.array(clf.kernel).tofile(save_path+'07_kernel_int32_string.bin')
np.array(clf.degree).tofile(save_path+'08_degree_int32.bin')
np.array(clf._gamma).astype(np.float32).tofile(save_path+'09_gamma_float32.bin')
np.array(clf.coef0).astype(np.float32).tofile(save_path+'10_coef0_float32.bin')
# (6)测试模型精度
print(' -------- 原版的SVM模型测试 ---------- ')
start_time = time.time()
result = clf.predict(X_train_feature)
end_time = time.time()
analysis_result(y_train, result, end_time-start_time)
start_time = time.time()
result = clf.predict(X_test_feature)
end_time = time.time()
analysis_result(y_test, result, end_time-start_time)