From 8f30f357732cfee65c82609bfafd7f8cf1422214 Mon Sep 17 00:00:00 2001
From: Prerak <prerakk.010@gmail.com>
Date: Tue, 17 Nov 2020 01:40:08 +0530
Subject: [PATCH] OpenCV functions

---
 .../image_processing/views.py                 | 76 ++++++++++++++++++-
 1 file changed, 72 insertions(+), 4 deletions(-)

diff --git a/green_cloud_computing/image_processing/views.py b/green_cloud_computing/image_processing/views.py
index a71b26a..2b4c55f 100644
--- a/green_cloud_computing/image_processing/views.py
+++ b/green_cloud_computing/image_processing/views.py
@@ -8,6 +8,12 @@
 from datetime import datetime, timedelta
 from time import sleep 
 
+#OpenCV
+import numpy as np
+import cv2
+from PIL import Image
+
+
 def index(request):
     return render(request, "frontend.html")
 
@@ -16,18 +22,80 @@ def upload_image(request):
     uploaded_file = request.FILES['filename']
     fs = FileSystemStorage()
     saved_name = fs.save(uploaded_file.name, uploaded_file) 
+    '''
     for record in imagesDB.objects.all():
         time_elapsed = datetime.now() - record.image_time
         if time_elapsed > timedelta(hours=1):
             record.delete()
         print(record.image_url) 
-        
+    '''    
+
 
     image_put = imagesDB(
-        image_name=uploaded_file.name, image_url=settings.MEDIA_URL+saved_name)
+        image_name=uploaded_file.name, image_url=settings.MEDIA_ROOT+'/'+saved_name)
     image_put.save()
 
-    # USe opencv and edit the image
-    # rewrite the image
+
+    # Use opencv and edit the image
+    s=settings.MEDIA_ROOT+'/'+saved_name
+    img=cv2.imread(s)
+    
+    
+    #GrayScale
+    if process=='GrayScale':
+        img_out=cv2.imread(s,0)
+
+    #Histogram Equilization (along Y axis)
+    elif process=='Histogram_Equilization':
+        img_yuv = cv2.cvtColor(img, cv2.COLOR_BGR2YUV)
+        img_yuv[:,:,0] = cv2.equalizeHist(img_yuv[:,:,0])
+        img_out = cv2.cvtColor(img_yuv, cv2.COLOR_YUV2BGR)
+
+    #Gaussian Blur
+    elif process=='Image_Blur':
+        img_out = cv2.GaussianBlur(img, (7, 7), 0)
+
+    #Brightness Increase
+    elif process=='Brightness_Increase':
+        alpha=1.5
+        beta=0
+        img_out=cv2.convertScaleAbs(img, alpha=alpha, beta=beta)
+
+    #Brightness Decrease
+    elif process=='Brightness_Decrease':
+        alpha=0.5
+        beta=0
+        img_out=cv2.convertScaleAbs(img, alpha=alpha, beta=beta)
+
+    #Color inversion
+    elif process=='Color_Inversion':
+        img_out = cv2.cvtColor(img,cv2.COLOR_BGR2RGB)
+    
+    #Negative image
+    elif process=='Negarive_Image':
+        img_out = cv2.bitwise_not(img)
+    
+    #Sepia Effect
+    elif process=='Sepia_Effect':
+        gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
+        normalized_gray = np.array(gray, np.float32)/255
+        sepia = np.ones(img.shape)
+        sepia[:,:,0] *= 153 #B
+        sepia[:,:,1] *= 204 #G
+        sepia[:,:,2] *= 255 #R
+        sepia[:,:,0] *= normalized_gray #B
+        sepia[:,:,1] *= normalized_gray #G
+        sepia[:,:,2] *= normalized_gray #R
+        img_out=np.array(sepia, np.uint8)
+    
+    #Contrast Limited Adaptive Histogram Equalization (CLAHE)
+    elif process=='CLAHE':
+        image_bw = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) 
+        clahe = cv2.createCLAHE(clipLimit = 5) 
+        img_out = clahe.apply(image_bw) + 30
+    
+    #Write
+    cv2.imwrite(s, img_out) 
+
 
     return redirect('http://127.0.0.1:8000'+settings.MEDIA_URL+saved_name)