arXiv Computer Vision

On the Choice of Tensor Estimation for Corner Detection, Optical Flow and Denoising

arXiv Computer Vision
Sep 1

Mapping-Based Image Diffusion

The paper introduces a tensor‑based functional for targeted image enhancement and denoising, incorporating application‑dependent and contextual information through explicit regularization. It establishes existence of a minimizer and discusses tensor symmetry constraints, convexity, and geometric interpretation. The framework demonstrates strong performance in nonlinear scenarios like gamma correction and targeted value‑range filtering, achieving results comparable to state‑of‑the‑art PDE‑based methods.

By Freddie {\AA}str\"om, Michael Felsberg, George Baravdish
arXiv AI
6d ago

Implicit Neural Representation for Hyperspectral Video Compression

The paper proposes an implicit neural representation approach for compressing hyperspectral video, extending an existing RGB video compression model. It reports significant improvements, achieving +4.99 dB Bjørntegaard Delta PSNR and –88.88 % rate reduction versus frame‑by‑frame traditional methods. The method also boosts downstream object‑tracking performance, improving area‑under‑curve by up to 23.42 % and distance precision by up to 35.56 % on the HOT2026 dataset.

By Alfredo Scalera, Paul Murray, Jaime Zabalza
arXiv Computer Vision
Sep 23

You've Seen Enough: Quality-Constrained Image Coding for Machines

The paper introduces Quality-Constrained Image Coding for Machines (ICM), which compresses images by treating a computer vision application as the primary observer while limiting human-observed quality to a specified target. By formulating joint compression and segmentation as a constrained optimization problem, the authors design penalty functions that steer the codec toward the desired visual quality, allowing remaining coding capacity to enhance machine performance. Experiments demonstrate significant bitrate savings—up to 22.82% over unconstrained joint optimization and 29.81% over a simple rate–distortion baseline—while maintaining target visual quality without added complexity.

By Khoa Pham-Dinh, Sanaz Nami, Hamed Rezazadegan Tavakoli, Moncef Gabbouj, Farhad Pakdaman