Update .gitignore and README.md; remove unused image files and fix style image resizing

.gitignore

@@ -1,8 +1,6 @@
 checkpoints
 test.py
 model.py
-sample.png
 visual_prompting.py
 test.png
-sample2.png
 output.png

README.md

@@ -72,7 +72,7 @@ style_img = Image.open("my_style_image.png").convert("RGB")
 
 # Convert the style image to a suitable tensor
 style_img = F.to_tensor(style_img)
-style_img = F.resize(style_img, (64, 64))    # Example resize
+style_img = F.resize((style_img.width * 64 // style_img.height, 64))    # Example resize
 style_img = F.normalize(style_img, [0.5], [0.5])  # Normalize to [-1, 1]
 style_img = style_img.unsqueeze(0).cuda()