本文整理汇总了Python中object_detection.core.losses.WeightedSigmoidClassificationLoss方法的典型用法代码示例。如果您正苦于以下问题：Python losses.WeightedSigmoidClassificationLoss方法的具体用法？Python losses.WeightedSigmoidClassificationLoss怎么用？Python losses.WeightedSigmoidClassificationLoss使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类object_detection.core.losses的用法示例。
在下文中一共展示了losses.WeightedSigmoidClassificationLoss方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_build_weighted_sigmoid_classification_loss
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def test_build_weighted_sigmoid_classification_loss(self):
losses_text_proto = """
classification_loss {
weighted_sigmoid {
}
}
localization_loss {
weighted_l2 {
}
}
"""
losses_proto = losses_pb2.Loss()
text_format.Merge(losses_text_proto, losses_proto)
classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
self.assertTrue(isinstance(classification_loss,
losses.WeightedSigmoidClassificationLoss)) 示例2: test_anchorwise_output
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def test_anchorwise_output(self):
losses_text_proto = """
classification_loss {
weighted_sigmoid {
anchorwise_output: true
}
}
localization_loss {
weighted_l2 {
}
}
"""
losses_proto = losses_pb2.Loss()
text_format.Merge(losses_text_proto, losses_proto)
classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
self.assertTrue(isinstance(classification_loss,
losses.WeightedSigmoidClassificationLoss))
predictions = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.5, 0.5]]])
targets = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.0, 1.0]]])
weights = tf.constant([[1.0, 1.0]])
loss = classification_loss(predictions, targets, weights=weights)
self.assertEqual(loss.shape, [1, 2]) 示例3: testHardExamplesProduceLossComparableToSigmoidXEntropy
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def testHardExamplesProduceLossComparableToSigmoidXEntropy(self):
prediction_tensor = tf.constant([[[_logit(0.55)],
[_logit(0.52)],
[_logit(0.50)],
[_logit(0.48)],
[_logit(0.45)]]], tf.float32)
target_tensor = tf.constant([[[1],
[1],
[1],
[0],
[0]]], tf.float32)
weights = tf.constant([[[1], [1], [1], [1], [1]]], tf.float32)
focal_loss_op = losses.SigmoidFocalClassificationLoss(gamma=2.0, alpha=None)
sigmoid_loss_op = losses.WeightedSigmoidClassificationLoss()
focal_loss = tf.reduce_sum(focal_loss_op(prediction_tensor, target_tensor,
weights=weights), axis=2)
sigmoid_loss = tf.reduce_sum(sigmoid_loss_op(prediction_tensor,
target_tensor,
weights=weights), axis=2)
with self.test_session() as sess:
sigmoid_loss, focal_loss = sess.run([sigmoid_loss, focal_loss])
order_of_ratio = np.power(10,
np.floor(np.log10(sigmoid_loss / focal_loss)))
self.assertAllClose(order_of_ratio, [[1., 1., 1., 1., 1.]]) 示例4: testNonAnchorWiseOutputComparableToSigmoidXEntropy
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def testNonAnchorWiseOutputComparableToSigmoidXEntropy(self):
prediction_tensor = tf.constant([[[_logit(0.55)],
[_logit(0.52)],
[_logit(0.50)],
[_logit(0.48)],
[_logit(0.45)]]], tf.float32)
target_tensor = tf.constant([[[1],
[1],
[1],
[0],
[0]]], tf.float32)
weights = tf.constant([[[1], [1], [1], [1], [1]]], tf.float32)
focal_loss_op = losses.SigmoidFocalClassificationLoss(gamma=2.0, alpha=None)
sigmoid_loss_op = losses.WeightedSigmoidClassificationLoss()
focal_loss = tf.reduce_sum(focal_loss_op(prediction_tensor, target_tensor,
weights=weights))
sigmoid_loss = tf.reduce_sum(sigmoid_loss_op(prediction_tensor,
target_tensor,
weights=weights))
with self.test_session() as sess:
sigmoid_loss, focal_loss = sess.run([sigmoid_loss, focal_loss])
order_of_ratio = np.power(10,
np.floor(np.log10(sigmoid_loss / focal_loss)))
self.assertAlmostEqual(order_of_ratio, 1.) 示例5: test_build_weighted_sigmoid_classification_loss
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def test_build_weighted_sigmoid_classification_loss(self):
losses_text_proto = """
classification_loss {
weighted_sigmoid {
}
}
localization_loss {
weighted_l2 {
}
}
"""
losses_proto = losses_pb2.Loss()
text_format.Merge(losses_text_proto, losses_proto)
classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
self.assertTrue(isinstance(classification_loss,
losses.WeightedSigmoidClassificationLoss)) 示例6: test_anchorwise_output
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def test_anchorwise_output(self):
losses_text_proto = """
classification_loss {
weighted_sigmoid {
anchorwise_output: true
}
}
localization_loss {
weighted_l2 {
}
}
"""
losses_proto = losses_pb2.Loss()
text_format.Merge(losses_text_proto, losses_proto)
classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
self.assertTrue(isinstance(classification_loss,
losses.WeightedSigmoidClassificationLoss))
predictions = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.5, 0.5]]])
targets = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.0, 1.0]]])
weights = tf.constant([[[1.0, 1.0, 1.0], [1.0, 1.0, 1.0]]])
loss = classification_loss(predictions, targets, weights=weights)
self.assertEqual(loss.shape, [1, 2, 3]) 示例7: testHardExamplesProduceLossComparableToSigmoidXEntropy
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def testHardExamplesProduceLossComparableToSigmoidXEntropy(self):
prediction_tensor = tf.constant([[[_logit(0.55)],
[_logit(0.52)],
[_logit(0.50)],
[_logit(0.48)],
[_logit(0.45)]]], tf.float32)
target_tensor = tf.constant([[[1],
[1],
[1],
[0],
[0]]], tf.float32)
weights = tf.constant([[1, 1, 1, 1, 1]], tf.float32)
focal_loss_op = losses.SigmoidFocalClassificationLoss(gamma=2.0, alpha=None)
sigmoid_loss_op = losses.WeightedSigmoidClassificationLoss()
focal_loss = tf.reduce_sum(focal_loss_op(prediction_tensor, target_tensor,
weights=weights), axis=2)
sigmoid_loss = tf.reduce_sum(sigmoid_loss_op(prediction_tensor,
target_tensor,
weights=weights), axis=2)
with self.test_session() as sess:
sigmoid_loss, focal_loss = sess.run([sigmoid_loss, focal_loss])
order_of_ratio = np.power(10,
np.floor(np.log10(sigmoid_loss / focal_loss)))
self.assertAllClose(order_of_ratio, [[1., 1., 1., 1., 1.]]) 示例8: testNonAnchorWiseOutputComparableToSigmoidXEntropy
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def testNonAnchorWiseOutputComparableToSigmoidXEntropy(self):
prediction_tensor = tf.constant([[[_logit(0.55)],
[_logit(0.52)],
[_logit(0.50)],
[_logit(0.48)],
[_logit(0.45)]]], tf.float32)
target_tensor = tf.constant([[[1],
[1],
[1],
[0],
[0]]], tf.float32)
weights = tf.constant([[1, 1, 1, 1, 1]], tf.float32)
focal_loss_op = losses.SigmoidFocalClassificationLoss(gamma=2.0, alpha=None)
sigmoid_loss_op = losses.WeightedSigmoidClassificationLoss()
focal_loss = tf.reduce_sum(focal_loss_op(prediction_tensor, target_tensor,
weights=weights))
sigmoid_loss = tf.reduce_sum(sigmoid_loss_op(prediction_tensor,
target_tensor,
weights=weights))
with self.test_session() as sess:
sigmoid_loss, focal_loss = sess.run([sigmoid_loss, focal_loss])
order_of_ratio = np.power(10,
np.floor(np.log10(sigmoid_loss / focal_loss)))
self.assertAlmostEqual(order_of_ratio, 1.) 示例9: test_anchorwise_output
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def test_anchorwise_output(self):
losses_text_proto = """
classification_loss {
weighted_sigmoid {
anchorwise_output: true
}
}
localization_loss {
weighted_l2 {
}
}
"""
losses_proto = losses_pb2.Loss()
text_format.Merge(losses_text_proto, losses_proto)
classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
self.assertTrue(isinstance(classification_loss,
losses.WeightedSigmoidClassificationLoss))
predictions = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.5, 0.5]]])
targets = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.0, 1.0]]])
weights = tf.constant([[1.0, 1.0]])
loss = classification_loss(predictions, targets, weights=weights)
self.assertEqual(loss.shape, [1, 2, 3]) 示例10: test_anchorwise_output
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def test_anchorwise_output(self):
losses_text_proto = """
classification_loss {
weighted_sigmoid {
anchorwise_output: true
}
}
localization_loss {
weighted_l2 {
}
}
"""
losses_proto = losses_pb2.Loss()
text_format.Merge(losses_text_proto, losses_proto)
classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
self.assertTrue(isinstance(classification_loss,
losses.WeightedSigmoidClassificationLoss))
predictions = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.5, 0.5]]])
targets = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.0, 1.0]]])
weights = tf.constant([[1.0, 1.0]])
loss = classification_loss(predictions, targets, weights=weights)
self.assertEqual(loss.shape, [1, 2, 3]) 示例11: __init__
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def __init__(self):
super(FakeDetectionModel, self).__init__(num_classes=NUMBER_OF_CLASSES)
self._classification_loss = losses.WeightedSigmoidClassificationLoss(
anchorwise_output=True)
self._localization_loss = losses.WeightedSmoothL1LocalizationLoss(
anchorwise_output=True) 示例12: testReturnsCorrectLoss
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def testReturnsCorrectLoss(self):
prediction_tensor = tf.constant([[[-100, 100, -100],
[100, -100, -100],
[100, 0, -100],
[-100, -100, 100]],
[[-100, 0, 100],
[-100, 100, -100],
[100, 100, 100],
[0, 0, -1]]], tf.float32)
target_tensor = tf.constant([[[0, 1, 0],
[1, 0, 0],
[1, 0, 0],
[0, 0, 1]],
[[0, 0, 1],
[0, 1, 0],
[1, 1, 1],
[1, 0, 0]]], tf.float32)
weights = tf.constant([[1, 1, 1, 1],
[1, 1, 1, 0]], tf.float32)
loss_op = losses.WeightedSigmoidClassificationLoss()
loss = loss_op(prediction_tensor, target_tensor, weights=weights)
exp_loss = -2 * math.log(.5)
with self.test_session() as sess:
loss_output = sess.run(loss)
self.assertAllClose(loss_output, exp_loss) 示例13: testReturnsCorrectAnchorWiseLoss
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def testReturnsCorrectAnchorWiseLoss(self):
prediction_tensor = tf.constant([[[-100, 100, -100],
[100, -100, -100],
[100, 0, -100],
[-100, -100, 100]],
[[-100, 0, 100],
[-100, 100, -100],
[100, 100, 100],
[0, 0, -1]]], tf.float32)
target_tensor = tf.constant([[[0, 1, 0],
[1, 0, 0],
[1, 0, 0],
[0, 0, 1]],
[[0, 0, 1],
[0, 1, 0],
[1, 1, 1],
[1, 0, 0]]], tf.float32)
weights = tf.constant([[1, 1, 1, 1],
[1, 1, 1, 0]], tf.float32)
loss_op = losses.WeightedSigmoidClassificationLoss(True)
loss = loss_op(prediction_tensor, target_tensor, weights=weights)
exp_loss = np.matrix([[0, 0, -math.log(.5), 0],
[-math.log(.5), 0, 0, 0]])
with self.test_session() as sess:
loss_output = sess.run(loss)
self.assertAllClose(loss_output, exp_loss) 示例14: testReturnsCorrectLossWithClassIndices
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def testReturnsCorrectLossWithClassIndices(self):
prediction_tensor = tf.constant([[[-100, 100, -100, 100],
[100, -100, -100, -100],
[100, 0, -100, 100],
[-100, -100, 100, -100]],
[[-100, 0, 100, 100],
[-100, 100, -100, 100],
[100, 100, 100, 100],
[0, 0, -1, 100]]], tf.float32)
target_tensor = tf.constant([[[0, 1, 0, 0],
[1, 0, 0, 1],
[1, 0, 0, 0],
[0, 0, 1, 1]],
[[0, 0, 1, 0],
[0, 1, 0, 0],
[1, 1, 1, 0],
[1, 0, 0, 0]]], tf.float32)
weights = tf.constant([[1, 1, 1, 1],
[1, 1, 1, 0]], tf.float32)
# Ignores the last class.
class_indices = tf.constant([0, 1, 2], tf.int32)
loss_op = losses.WeightedSigmoidClassificationLoss(True)
loss = loss_op(prediction_tensor, target_tensor, weights=weights,
class_indices=class_indices)
exp_loss = np.matrix([[0, 0, -math.log(.5), 0],
[-math.log(.5), 0, 0, 0]])
with self.test_session() as sess:
loss_output = sess.run(loss)
self.assertAllClose(loss_output, exp_loss) 示例15: __init__
# 需要导入模块: from object_detection.core import losses [as 别名]
# 或者: from object_detection.core.losses import WeightedSigmoidClassificationLoss [as 别名]
def __init__(self):
super(FakeDetectionModel, self).__init__(num_classes=NUMBER_OF_CLASSES)
self._classification_loss = losses.WeightedSigmoidClassificationLoss()
self._localization_loss = losses.WeightedSmoothL1LocalizationLoss()