August 2021
Beginner to intermediate
720 pages
15h 32m
Korean
Content preview from fastai와 파이토치가 만나 꽃피운 딥러닝
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257
5
이미지 분류
epoch train
loss valid
loss error
rate time
0 1
.
491732 0
.
337355 0
.
108254 00
:
18
epoch train
loss valid
loss error
rate time
0 0
.
503154 0
.
293404 0
.
096076 00
:
23
1 0
.
314759 0
.
225316 0
.
066306 00
:
23
앞서 잠시 언급했듯이, 모델을 학습시킬 때 나타나는 표는 학습의 각 에포크가 끝난 후의 결과
를 보여줍니다. 한 에포크는 데이터에 포함된 이미지를 모두 한 번씩 처리했다는 뜻임을 기억
해 두세요. 각 열은 학습용 및 검증용 데이터셋에서의 평균 손실 정보와 요청한 평가지표를 포
함합니다. 여기서는 에러율 (
error
_
rate
)이죠.
은 모델 파라미터를 최적화하는 데 사용하기로 한 어떤 함수도 될 수 있습니다. 그런데 우
리는 명시적으로 사용할 손실 함수를 지정한 적이 없죠. 내부적으로 무슨 일이 일어날까요?
fastai
는 사용 중인 데이터와 모델의 종류에 따라 적절한 손실 함수를 고릅니다. 여기서는 이미
지 데이터를 입력받아서 범주형 출력을 내놓으므로, 기본적으로
cross
-
entropy
loss
을 선택합니다.
5.3
은 앞 장에서 사용한 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.