Axine Labs
Free / commercial imagery

Detecção de Anomalias de Alvos Subpixel

Anomalias abaixo do tamanho de um pixel: revestimentos artificiais, materiais de camuflagem e objetos de baixa fração de preenchimento.

Detecção de anomalias contra um fundo estimado localmente, para materiais artificiais menores que um pixel.

Detecção de Anomalias de Alvos Subpixel
In view

Sub-pixel anomaly response over mixed ground, where a target occupies part of a pixel rather than all of it.

O QUE ELA ENCONTRA

O que ela detecta.

MaterialContexto típicoO que pode confundi-la
Man-Made Materials & Camouflage FabricsTactical terrain, infrastructure security, and border surveillance zonesDense natural canopy shadowing and bright specular reflections

MÉTODO

Como funciona.

Entra reflectância calibrada, e cada pixel é ajustado contra uma biblioteca pública de referência.

01Step 1

Background covariance estimation

Local and scene-wide background covariance are computed across the contiguous channels. How well this works depends on how many distinct materials the background already contains.

02Step 2

Reed-Xiaoli anomaly detection

Measures how far each pixel sits from its surrounding background in spectral distance, with the false alarm rate held constant rather than the threshold.

03Step 3

Constrained energy minimisation

A filter that passes a chosen target signature at unit gain while suppressing everything else. It needs a signature to look for, which is the difference between this and plain anomaly detection.

04Step 4

Abundance and coordinates

Surviving pixels carry an estimated abundance and a location, and each export records the confidence attached to it.

ESPECIFICAÇÕES

O que você recebe, e sobre o que ela roda.

Valores entreguesDetector response and estimated abundance, floating point
SaídaSub-pixel anomaly layer
Prazo de entregaQuoted with the order once this moves out of development
Formatos
GeoJSON Target AlertsCloud-Optimized GeoTIFF (COG)Provenance record (detector version, background window, scene ids)

Condições de que precisa

Sun angle limit:55°
Cloud cover limit:5%
Vegetation cover limit:50%

Method and checks are documented in Axine Applied Spectroscopy Technical Whitepaper · Series 6.

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Escopo

Exploratory. Detection degrades as the background gets more varied and as the target fills less of a pixel.