P. Johnson

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20242026

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eess.IV2026

Image Denoising Using Lower Semi-Frames

Hemalatha M, P. Sam Johnson

A blind image denoising framework based on an infinite directional lower semi-frame (DLSF) is proposed for additive white Gaussian noise. The model employs scale-dependent directio…

math.FA2026

Characterization of Frame-Related Sequences on Semi-Hilbert Spaces

Hemalatha M, P. Sam Johnson

Let $A \in B (H)^{+}$ and $B \in B (ℓ^{2})^{+}$ be positive bounded operators. We investigate reduced weighted adjoints of densely defined closable operators and use the…