在Django里展示图片

Author: makelove

my09-图片展示/NOTE.md

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+
+
+- 参考
+    - [Creating a face detection API with Python and OpenCV (in just 5 minutes)](https://www.pyimagesearch.com/2015/05/11/creating-a-face-detection-api-with-python-and-opencv-in-just-5-minutes/)
+    - [How to stream opencv frame with django frame in realtime?](https://stackoverflow.com/questions/45906482/how-to-stream-opencv-frame-with-django-frame-in-realtime)

my09-图片展示/cv_html.png

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+## 在Django里展示图片
+
+- 定义路径
+```python
+from django.conf.urls import url
+
+from .views import cvtest
+
+
+urlpatterns = {
+    url(r'^display_image$', cvtest.display_image, name='display_image'),
+
+}
+
+```
+
+- 编写视图
+```python
+from django.http import HttpResponse
+import cv2
+
+
+def display_image(request):
+    fn = '/Users/play/Desktop/114311.jpg'
+    img = cv2.imread(fn)
+    img[:, :, 2] = 0  # 对图片进行处理
+    ret, jpeg = cv2.imencode('.jpg', img)
+    return HttpResponse(jpeg.tostring(), content_type="multipart/x-mixed-replace")
+
+```
+- 在浏览器里访问
+    - http://0.0.0.0:8000/test/display_image
+    - ![display_image](display_image.jpg "display_image")
+    
+- 在网页里引用
+    - ![display_image](cv_html.png "display_image")
+```html
+<img src='/test/display_image'></img>
+```    
+