remove opencv and torch imports

app.py

@@ -1,21 +1,16 @@
 import gradio as gr
-import cv2
 
-import torch
 import kornia as K
+from kornia.core import Tensor
 
-def load_torch_image(fname):
-    img = K.image_to_tensor(fname, False).float() / 255.
-    img = K.color.bgr_to_rgb(img)
-    return img
 
+def enhance(file, brightness, contrast, saturation, gamma, hue):      
+    # load the image using the rust backend          
+    img: Tensor = K.io.load_image(file.name, K.io.ImageLoadType.RGB32)
+    img = img[None] / 255.
 
-def enhance(file, brightness, contrast, saturation, gamma, hue):
-    fname = file.name
-    im = cv2.imread(fname)                 
-    img = load_torch_image(im)
-
-    x_out: torch.Tensor = K.enhance.adjust_brightness(img, float(brightness))
+    # apply tensor image enhancement
+    x_out: Tensor = K.enhance.adjust_brightness(img, float(brightness))
     x_out = K.enhance.adjust_contrast(x_out, float(contrast))
     x_out = K.enhance.adjust_saturation(x_out, float(saturation))
     x_out = K.enhance.adjust_gamma(x_out, float(gamma))