Preprocessing: preparatory steps performed before the main processing in data analysis, manufacturing, or experiments—such as noise removal, normalization, or other preliminary treatments.
機械学習の前にデータの前処理をしっかり行わないと精度が出ない。
If you don't perform proper preprocessing of the data before machine learning, you won't get good accuracy.
実験材料は前処理として洗浄と乾燥を行った。
As preprocessing, the experimental materials were washed and dried.
画像解析では前処理でコントラストを調整することが多い。
In image analysis, it's common to adjust contrast during preprocessing.