Latent log-linear models for handwritten digit classification

Area of Science:

• Machine Learning
• Statistical Modeling

Background:

• Log-linear models are widely used but can be limited in flexibility.
• Incorporating latent variables offers a way to extend their capabilities.

Purpose of the Study:

• To introduce latent log-linear models as an extension of traditional log-linear models.
• To propose and evaluate two novel applications: log-linear mixture models and image deformation-aware log-linear models.

Main Methods:

• Developed latent log-linear models with controllable complexity.
• Employed alternating optimization for training both mixture and deformation-aware models.
• Guaranteed convergence to a stationary point for certain model variants.

Main Results:

• Achieved competitive performance on the MNIST dataset with significantly fewer parameters.
• Demonstrated strong generalization capabilities of the proposed models.
• Log-linear mixture models provided enhanced flexibility; deformation-aware models directly addressed image deformations.

Conclusions:

• Latent log-linear models offer a powerful and efficient approach to statistical modeling.
• The proposed applications demonstrate practical advantages in flexibility and performance.
• These models represent a significant advancement in discriminative modeling for complex data.