models/cnn_model.py

# models/cnn_model.py

import torch.nn as nn

class MonkeyCNN(nn.Module):
    def __init__(self, num_classes):
        super(MonkeyCNN, self).__init__()
        self.net = nn.Sequential(
            # Conv Block 1
            nn.Conv2d(3, 32, kernel_size=3, padding=1),
            nn.BatchNorm2d(32),
            nn.ReLU(),
            nn.MaxPool2d(2),

            # Conv Block 2
            nn.Conv2d(32, 64, kernel_size=3, padding=1),
            nn.BatchNorm2d(64),
            nn.ReLU(),
            nn.MaxPool2d(2),

            # Conv Block 3
            nn.Conv2d(64, 128, kernel_size=3, padding=1),
            nn.BatchNorm2d(128),
            nn.ReLU(),
            nn.MaxPool2d(2),

            # Conv Block 4 (Optional: add more depth)
            nn.Conv2d(128, 256, kernel_size=3, padding=1),
            nn.BatchNorm2d(256),
            nn.ReLU(),
            nn.AdaptiveAvgPool2d((1, 1)),  # Output size: [B, 256, 1, 1]

            nn.Flatten(),
            nn.Dropout(0.3),
            nn.Linear(256, num_classes)
        )

    def forward(self, x):
        return self.net(x)