Introduction

It's just a memo, so I'll omit the detailed settings of Django. The project is image_pred and the app name is myapp. The settings are only basic, as in the first part of the official page.

program

From index.html, send the image using the form.

`index.html`


{% load static %}
<!doctype html>
<html lang="ja">
<head>
 <meta charset="utf-8">
 <title>title</title>
</head>
<body>
   <div id = "input_form">
      <form action="{% url 'index' %}" method="POST" enctype="multipart/form-data">
         {% csrf_token %}
         {{ form }}
         <input type="submit" value="Send" />
      </form>
   </div>
   <!--<div id = "prevent"><img src="{{question_id}}"></div>-->
   <div id = "predict">{{urls}}</div>
</body>
</html>

`forms.py`


from django import forms

class PhotoForm(forms.Form):
    image = forms.ImageField(label='Please select an image')

`views.py`


from django.shortcuts import render, redirect
from django.http import HttpResponse
from django.views.generic import TemplateView
from .forms import PhotoForm

class MyappView(TemplateView):
    def __init__(self):
        self.params={'form': PhotoForm()}
        
    def get(self, req):
        return render(req, 'index.html', self.params)

    def post(self, req):
        form = PhotoForm(req.POST, req.FILES)
        if not form.is_valid():
            raise ValueError('invalid form')

        image = form.cleaned_data['image']
        self.url_get(req, image)
        return render(req, 'index.html', self.params)

    def url_get(self, req, url):
        from PIL import Image
        import base64
        import io
        from io import BytesIO

        img = Image.open(url)
        with io.BytesIO() as output:
            img.save(output,format="JPEG")
            contents = output.getvalue()
            data = base64.b64encode(contents)
            #print('data:image/jpeg;base64,' + str(data)[2:-1])
            self.params['urls'] = 'data:image/jpeg;base64,' + str(data)[2:-1]

result

This is the first image. Select the file and click Recognize. キャプチャ.PNG

I think you will see a result like this, so you can display the image based on this. キャプチャ3.PNG

References

Since the creation of the project etc. is based on this material, there are many parts of the program that are the same. https://trafalbad.hatenadiary.jp/entry/2018/09/11/105500

[PYTHON] Convert PIL format images read from form with Django to base64 format