`cv2.resize` interpolation fix (#7903)

Fix for https://github.com/ultralytics/yolov5/discussions/7901

utils/dataloaders.py

@@ -663,7 +663,7 @@ class LoadImagesAndLabels(Dataset):
             h0, w0 = im.shape[:2]  # orig hw
             r = self.img_size / max(h0, w0)  # ratio
             if r != 1:  # if sizes are not equal
-                interp = cv2.INTER_LINEAR if self.augment else cv2.INTER_AREA  # random.choice(self.rand_interp_methods)
+                interp = cv2.INTER_LINEAR if (self.augment or r > 1) else cv2.INTER_AREA
                 im = cv2.resize(im, (int(w0 * r), int(h0 * r)), interpolation=interp)
             return im, (h0, w0), im.shape[:2]  # im, hw_original, hw_resized
         else: