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Subkash2206/README.md

Terminal bio animation

Research

Broadly into computer vision and deep learning. Most of my work asks whether something assumed to be true actually holds up under scrutiny.

Spectral Mamba · Does Mamba's scan mechanism introduce aliasing that hurts boundary segmentation? Audited VM-UNet against Swin and UNet on ISIC2018 (N=519). Hypothesis not supported, but the analysis uncovered a dual-stage spectral fingerprint in SSMs: high-frequency front-loading at Stage 1 that collapses by Stage 4. A previously reported AVR-BF1 correlation also turned out to be an intensity bias artifact once DC correction was applied.

Brain Tumor Segmentation · MIDL 2026 · Does BlurPool help 3D medical image segmentation? Tested on BraTS 2021 using SegResNet. Small performance drop and a counterintuitive shift consistency regression (98% to 91%). Null results need reporting too.

Spectral Aliasing in CNNs · Introduced AVR and SIS to quantify aliasing behavior in convolutional networks on STL-10. BlurPool reduces shift instability by ~39.8%, but networks appear to compensate by learning higher pre-blur aliasing. Preprint in progress.

Contact

subhashkashyap2206@gmail.com · github.com/Subkash2206

Into deep learning and computer vision.

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  1. aliasing-tumor-boundaries aliasing-tumor-boundaries Public

    Official Code for my MIDL 2026 Paper: Investigating the structural cost of anti-aliasing in 3D volumetric medical segmentation. Evaluates the trade-off between spectral smoothing and boundary preci…

    Python 5

  2. spectral-mamba-analysis spectral-mamba-analysis Public

    Comparative spectral analysis of CNNs, Transformers, and State Space Models for medical image segmentation. Introduces AVR-based spectral fingerprinting across architecture paradigms.

    Python 4

  3. spectral-aliasing-cnns spectral-aliasing-cnns Public

    A spectral analysis framework for studying aliasing in strided CNNs. Defines the Alias Violation Ratio (AVR) and Shift Instability Score (SIS) to quantify Nyquist violations and their relationship …

    Python 7

  4. sparse-signal-toolkit sparse-signal-toolkit Public

    From-scratch DSP implementations investigating FFT optimization, compressed sensing, and spectral analysis. Achieves 8x speedup and <5% reconstruction error with comprehensive testing.

    Python 2