Generalized linear mixing model accounting for endmember variability

Endmember variability is an important factor for accurately unveiling vital information relating the pure materials and their distribution in hyperspectral images. Recently, the extended linear mixing model (ELMM) has been proposed as a modification of the linear mixing model (LMM) to consider endmember variability effects resulting mainly from illumination changes. In this paper, we further generalize the ELMM leading to a new model (GLMM) to account for more complex spectral distortions where different wavelength intervals can be affected unevenly. We also extend the existing methodology to jointly estimate the variability and the abundances for the GLMM. Simulations with real and synthetic data show that the unmixing process can benefit from the extra flexibility introduced by the GLMM

Re-collecting Jim. Discovering a name and a slave narrative's continuing truth

In a follow-up installment in 1839 to the anonymously authored Recollections of Slavery by a Runaway Slave, the narrator testifies that a Charleston slave speculator known as "Major Ross" had sold his brother. The narrator notes that Ross lives in "a nice little white house, on the right hand side of King street as you go in from the country towards the market." The right-hand side? Was that level of precision necessary? Because people challenged the veracity of slave narratives at the time they were published, details mattered very much. But the level of specificity in this instance caught my eye. The facts were borne out: property records in the Charleston County Register Mesne Conveyance Deeds office show that in 1831, a James L. Ross, known also as "Major Ross," purchased a house situated on the west side of King Street, just a few blocks north of the market. If you were entering the city of Charleston from the country, Ross' house would indeed have been on the right-hand side (fig 1). And so it comes down to that. In order to prove his own humanity, the truth about the human capacity for cruelty, and the very reputation of abolitionist crusaders of the American Anti-Slavery Society, this survivor made his story unassailable by giving the correct location for the speculator's house on King Street in Charleston

Tales From The Punkside

Book design for 'Tales From The Punkside', second edition: a punk anthology of independent writing and artwork