FER/prediction.py

import torch
import os
from torchvision import transforms
import numpy as np

# Checking for all types of devices available
if torch.backends.mps.is_available():
    device = "mps"
elif torch.cuda.is_available():
    device = "cuda"
else:
    device = "cpu"

print(f"Using device: {device}")

image_arr = []
for foldername, subfolders, filenames in os.walk("../FER/Images/"):
    for filename in filenames:
        # Construct the full path to the file
        file_path = os.path.join(foldername, filename)
        image_arr.append(f"{file_path}")


def predict(model, image_path):
    from face_detection import face_detection

    with torch.no_grad():
        transform = transforms.Compose(
            [
                transforms.Resize((224, 224)),
                transforms.RandomHorizontalFlip(),
                transforms.ToTensor(),
                transforms.Normalize(
                    mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]
                ),
                transforms.RandomErasing(p=1, scale=(0.05, 0.05)),
            ]
        )
        face = face_detection(image_path)
        image_tensor = transform(face).unsqueeze(0)
        image_tensor = image_tensor.to(device)

        model.eval()
        img_pred = model(image_tensor)
        topk = (3,)
        with torch.no_grad():
            maxk = max(topk)
            # batch_size = target.size(0)
            _, pred = img_pred.topk(maxk, 1, True, True)
            pred = pred.t()

        img_pred = pred
        img_pred = img_pred.squeeze().cpu().numpy()
        im_pre_label = np.array(img_pred)
        y_pred = im_pre_label.flatten()
        emotions = {
            0: "Surprise",
            1: "Fear",
            2: "Disgust",
            3: "Happy",
            4: "Sad",
            5: "Angry",
            6: "Neutral",
        }
        labels = []
        for i in y_pred:
            labels.append(emotions.get(i))

        print(
            f"-->Image Path {image_path} [!] The predicted labels are {y_pred} and the label is {labels}"
        )
    return