Why and how to pick the image size for DataBunch?

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Why and how to pick the image size for DataBunch?

27:48-29:15 Why and how to pick the image size for DataBunch

• Why do we need to set the image size?
  • every image has its size
  • GPU needs images with same shape, size to run fast

• what shape we usually create?
  • in part 1, square shape, most used
  • in part 2, learn rectangle shape, with nuanced difference
• What size value work most of the time generally?
  • size = 224

• What special about fastai? *
  • teach us the best and most used techniques to improve performance
  • make the all the decisions for us if necessary, such as size=224 now * 目录 Lesson 1 知识点分解 #63