downscaling images an converting to base64 string

api/endpoints/salamander.py

@@ -4,6 +4,7 @@ from flask_restful import Resource
 from api import db, limiter
 from api.models.dbmodels import Location, User, Salamander
 import os
+import cv2
 import glob
 from image_encoder.image_encoder import *
 from path_constants import _ACCESS_DATABASE
@@ -28,7 +29,20 @@ class SalamanderEndpoint(Resource):
                     list_of_paths = glob.glob(os.path.join(path_to_salamander_images, '*.*'))
                     for path in list_of_paths:
                         if not path.__contains__("_str"):
-                            encoded = encode(path)[2:-1]
+
+                            image = cv2.imread(path)
+
+                            # percent of original size
+                            scale_percent = 40
+                            width = int(image.shape[1] * scale_percent / 100)
+                            height = int(image.shape[0] * scale_percent / 100)
+                            dim = (width, height)
+
+                            # resize image
+                            resized = cv2.resize(image, dim, interpolation=cv2.INTER_AREA)
+
+                            encoded = base64.b64encode(cv2.imencode(".jpg", resized)[1]).decode()
+
                             image_id = os.path.basename(path)[0]
                             image_data = {"id": image_id, "url": "data:image/png;base64," + encoded}
                             salamander_images.append(image_data)

api/endpoints/salamanderimageid.py

+import sys
+
 from flask import jsonify
 from flask_jwt_extended import jwt_required, get_jwt_identity
 from flask_restful import Resource
@@ -7,6 +9,8 @@ import os
 import glob
 from image_encoder.image_encoder import *
 from path_constants import _ACCESS_DATABASE
+import cv2
+
 
 # get one specific image on a specific salamander based on s_id and i_id
 class SalamanderImageEndpoint(Resource):
@@ -20,20 +24,38 @@ class SalamanderImageEndpoint(Resource):
         if user.admin:
             with _ACCESS_DATABASE:
                 salamander = db.session.query(Salamander).filter_by(id=salamander_id).first()
-                salamander_growth = db.session.query(SalamanderGrowth).filter_by(salamander_id=salamander.id, image_id=image_id).first()
+                salamander_growth = db.session.query(SalamanderGrowth).filter_by(salamander_id=salamander.id,
+                                                                                 image_id=image_id).first()
                 if salamander and salamander_growth:
                     location = db.session.query(Location).filter_by(id=salamander.location_id).first()
                     salamander_images = []
-                    path_to_salamander_images = os.path.join("./images", location.name, salamander.species, salamander.sex, str(salamander.id))
+                    path_to_salamander_images = os.path.join("./images", location.name, salamander.species,
+                                                             salamander.sex, str(salamander.id))
                     list_of_paths = glob.glob(os.path.join(path_to_salamander_images, '*.*'))
                     for path in list_of_paths:
                         basename = os.path.basename(path)
                         if basename.__contains__(str(image_id)):
-                            encoded = encode(path)[2:-1]
+
+                            image = cv2.imread(path)
+
+                            # percent of original size
+                            scale_percent = 20
+                            width = int(image.shape[1] * scale_percent / 100)
+                            height = int(image.shape[0] * scale_percent / 100)
+                            dim = (width, height)
+
+                            # resize image
+                            resized = cv2.resize(image, dim, interpolation=cv2.INTER_AREA)
+
+                            encoded = base64.b64encode(cv2.imencode(".jpg", resized)[1]).decode()
+
                             image_data = {"url": "data:image/png;base64," + encoded}
                             salamander_images.append(image_data)
 
-                    return jsonify({"images": salamander_images, "length": salamander_growth.length, "weight": salamander_growth.weight, "imageId": image_id,  "location": location.name, "salamanderId": salamander.id, "sex": salamander.sex, "species": salamander.species, 'status': 200})
+                    return jsonify({"images": salamander_images, "length": salamander_growth.length,
+                                    "weight": salamander_growth.weight, "imageId": image_id, "location": location.name,
+                                    "salamanderId": salamander.id, "sex": salamander.sex, "species": salamander.species,
+                                    'status': 200})
                 else:
                     return jsonify({"message": "no salamander with this id or no growth data", 'status': 400})
         else: