13. 生成されたキャプションの評価方法
機械翻訳では…
• テスト文に複数の参照訳が付随(通常5文)
• これらの参照訳と近い訳文が「良い」
One jet lands at an airport while another takes off next to i
Two airplanes parked in an airport.
Two jets taxi past each other.
Two parked jet airplanes facing opposite directions.
two passenger planes on a grassy plain
キャプション生成の評価でも同様の流れ
PASCAL Sentenceの画像と参照キャプションの例
29. Cross Entropy のみでキャプション生成を学習した場合
A blue of a building with a blue umbrella on it
SCST でキャプション生成を学習した場合
A blue boat is sitting on the side of a building
31. その他のOOOCで生成した例
Cross Entropy
A person is holding a small animal in their hand
SCST
A person holding a giraffe in a field
Cross Entropy
A man in a red shirt standing in front of a green field
SCST
A man standing in front of a street with a television
Cross Entropy
A red car parked on the side of a body of water
SCST
A red car is in the water with a city