ZOE is the healthcare startup behind the COVID Symptom Tracker, an app helping scientists and authorities understand the symptoms and spread of the virus. More than 3M people participated in this citizen science project, leading to the publication of several research papers and discoveries at https://covid.joinzoe.com/blog.
The COVID Symptom Tracker is the first React Native app released by the ZOE engineering team. In this talk, they will share their experience adopting RN, the challenges they faced and whether they believe this choice was the right one in this context.
If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?
In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.
Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.
Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.
The popularity of React Native comes from its advantages. Some of its advantages are as follows:
Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.
React Native is very close to native. Consider the following aspects as described on the React Native website:
Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.
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파이썬 무료 강의 (활용편6 - 이미지 처리)입니다.
OpenCV 를 이용한 다양한 이미지 처리 기법과 재미있는 프로젝트를 진행합니다.
누구나 볼 수 있도록 쉽고 재미있게 제작하였습니다. ^^
(0:02:18) 2.활용편 6 이미지 처리 소개
(0:08:41) 4.이미지 출력
(0:21:51) 5.동영상 출력 #1 파일
(0:29:58) 6.동영상 출력 #2 카메라
(0:34:23) 7.도형 그리기 #1 빈 스케치북
(0:39:49) 8.도형 그리기 #2 영역 색칠
(0:42:26) 9.도형 그리기 #3 직선
(0:51:23) 10.도형 그리기 #4 원
(0:55:09) 11.도형 그리기 #5 사각형
(0:58:32) 12.도형 그리기 #6 다각형
(1:09:23) 13.텍스트 #1 기본
(1:17:45) 14.텍스트 #2 한글 우회
(1:24:14) 15.파일 저장 #1 이미지
(1:29:27) 16.파일 저장 #2 동영상
(1:39:29) 17.크기 조정
(1:50:16) 18.이미지 자르기
(1:57:03) 19.이미지 대칭
(2:01:46) 20.이미지 회전
(2:06:07) 21.이미지 변형 - 흑백
(2:11:25) 22.이미지 변형 - 흐림
(2:18:03) 23.이미지 변형 - 원근 #1
(2:27:45) 24.이미지 변형 - 원근 #2
[반자동 문서 스캐너 프로젝트]
(2:32:50) 25.미니 프로젝트 1 - #1 마우스 이벤트 등록
(2:42:06) 26.미니 프로젝트 1 - #2 기본 코드 완성
(2:49:54) 27.미니 프로젝트 1 - #3 지점 선 긋기
(2:55:24) 28.미니 프로젝트 1 - #4 실시간 선 긋기
(3:01:52) 29.이미지 변형 - 이진화 #1 Trackbar
(3:14:37) 30.이미지 변형 - 이진화 #2 임계값
(3:20:26) 31.이미지 변형 - 이진화 #3 Adaptive Threshold
(3:28:34) 32.이미지 변형 - 이진화 #4 오츠 알고리즘
(3:32:22) 33.이미지 변환 - 팽창
(3:41:10) 34.이미지 변환 - 침식
(3:45:56) 35.이미지 변환 - 열림 & 닫힘
(3:54:10) 36.이미지 검출 - 경계선
(4:05:08) 37.이미지 검출 - 윤곽선 #1 기본
(4:15:26) 38.이미지 검출 - 윤곽선 #2 찾기 모드
(4:20:46) 39.이미지 검출 - 윤곽선 #3 면적
[카드 검출 & 분류기 프로젝트]
(4:27:42) 40.미니프로젝트 2
(4:41:25) 42.환경설정 및 기본 코드 정리
(4:54:48) 43.눈과 코 인식하여 도형 그리기
(5:10:42) 44.그림판 이미지 씌우기
(5:20:52) 45.캐릭터 이미지 씌우기
(5:40:53) 47.마치며 (학습 참고 자료)
수업에 필요한 이미지, 동영상 자료 링크입니다.
고양이 이미지 : https://pixabay.com/images/id-2083492/
크기 : 640 x 390
파일명 : img.jpg
고양이 동영상 : https://www.pexels.com/video/7515833/
크기 : SD (360 x 640)
파일명 : video.mp4
신문 이미지 : https://pixabay.com/images/id-350376/
크기 : 1280 x 853
파일명 : newspaper.jpg
카드 이미지 1 : https://pixabay.com/images/id-682332/
크기 : 1280 x 1019
파일명 : poker.jpg
책 이미지 : https://www.pexels.com/photo/1029807/
크기 : Small (640 x 853)
파일명 : book.jpg
눈사람 이미지 : https://pixabay.com/images/id-1300089/
크기 : 1280 x 904
파일명 : snowman.png
카드 이미지 2 : https://pixabay.com/images/id-161404/
크기 : 640 x 408
파일명 : card.png
퀴즈용 동영상 : https://www.pexels.com/video/3121459/
크기 : HD (1280 x 720)
파일명 : city.mp4
프로젝트용 동영상 : https://www.pexels.com/video/3256542/
크기 : Full HD (1920 x 1080)
파일명 : face_video.mp4
프로젝트용 캐릭터 이미지 : https://www.freepik.com/free-vector/cute-animal-masks-video-chat-application-effect-filters-set_6380101.htm
파일명 : right_eye.png (100 x 100), left_eye.png (100 x 100), nose.png (300 x 100)
무료 이미지 편집 도구 : https://pixlr.com/kr/
(Pixlr E -Advanced Editor)