UI - Disertasi Membership :: Kembali

UI - Disertasi Membership :: Kembali

Perlin Noise and Cosine Scheduler in Diffusion Models for Non-normal Data Imputation

Ari Wibisono; Petrus Mursanto, promotor; See, Simon, co-promotor; Denny, co-promotor; Heru Suhartanto, examiner; Wisnu Jatmiko, examiner; Christine Fatichah, examiner; Adila Alfa Krisnadhi, examiner (Fakultas Ilmu Komputer Universitas Indonesia, 2025)

 Abstrak

Imputation is a critical method for enhancing dataset quality, essential for ensuring accurate analysis and insights. This research proposes an advanced imputation algorithm utilizing a Diffusion Model enhanced with Perlin noise generation. Perlin noise is introduced at each step of the diffusion process, paired with a cosine scheduler to optimize performance. Its smooth and continuous nature makes it well-suited for non-normal data by introducing gradual variations that align closely with the underlying structure of the data. Our approach demonstrates improvements in imputing non-normal data, validated through tests on ten real datasets and comparisons to imputation methods based on diffusion models. The results highlight a marked reduction in RMSE error values, achieving up to a 10% improvement, showcasing the efficacy of Perlin noise and the scheduler. However, the computational cost of Perlin noise, with its exponential complexity is significantly higher than Gaussian noise, making it particularly impactful in high-dimensional datasets. Despite this, the superior accuracy achieved justifies the cost for complex, non-normal datasets, offering a robust alternative to standard imputation methods. These dissertation findings providing insights into the usage of Perlin noise-based imputation for real-world applications.

Imputation is a critical method for enhancing dataset quality, essential for ensuring accurate analysis and insights. This research proposes an advanced imputation algorithm utilizing a Diffusion Model enhanced with Perlin noise generation. Perlin noise is introduced at each step of the diffusion process, paired with a cosine scheduler to optimize performance. Its smooth and continuous nature makes it well-suited for non-normal data by introducing gradual variations that align closely with the underlying structure of the data. Our approach demonstrates improvements in imputing non-normal data, validated through tests on ten real datasets and comparisons to imputation methods based on diffusion models. The results highlight a marked reduction in RMSE error values, achieving up to a 10% improvement, showcasing the efficacy of Perlin noise and the scheduler. However, the computational cost of Perlin noise, with its exponential complexity is significantly higher than Gaussian noise, making it particularly impactful in high-dimensional datasets. Despite this, the superior accuracy achieved justifies the cost for complex, non-normal datasets, offering a robust alternative to standard imputation methods. These dissertation findings providing insights into the usage of Perlin noise-based imputation for real-world applications.

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Jenis Koleksi : UI - Disertasi Membership
No. Panggil : D-pdf
Entri utama-Nama orang :
Entri tambahan-Nama orang :
Entri tambahan-Nama badan :
Program Studi :
Subjek :
Penerbitan : Depok: Fakultas Ilmu Komputer Universitas Indonesia, 2025
Bahasa : eng
Sumber Pengatalogan : LibUI eng rda
Tipe Konten : text
Tipe Media : computer
Tipe Carrier : online resource
Deskripsi Fisik : xii, 155 pages : illustration + appendix
Naskah Ringkas :
Lembaga Pemilik : Universitas Indonesia
Lokasi : Perpustakaan UI
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