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Your search keyword '"Rud, Ronit"' showing total 13 results
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13 results on '"Rud, Ronit"'

1. Ground Truth Simulation for Deep Learning Classification of Mid-Resolution Venus Images Via Unmixing of High-Resolution Hyperspectral Fenix Data

Author

Faran, Ido, Netanyahu, Nathan S., David, Eli, Shoshany, Maxim, Kizel, Fadi, Chang, Jisung Geba, and Rud, Ronit

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning, Computer Science - Neural and Evolutionary Computing, Statistics - Machine Learning
Abstract

Training a deep neural network for classification constitutes a major problem in remote sensing due to the lack of adequate field data. Acquiring high-resolution ground truth (GT) by human interpretation is both cost-ineffective and inconsistent. We propose, instead, to utilize high-resolution, hyperspectral images for solving this problem, by unmixing these images to obtain reliable GT for training a deep network. Specifically, we simulate GT from high-resolution, hyperspectral FENIX images, and use it for training a convolutional neural network (CNN) for pixel-based classification. We show how the model can be transferred successfully to classify new mid-resolution VENuS imagery.

Published
2019
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13. Spectral indicators for salinity effects in crops: a comparison of a new green indigo ratio with existing indices.

Author

Rud, Ronit, Shoshany, Maxim, and Alchanatis, Victor

Subjects
*SPECTRUM analysis, *EGGPLANT, *CAULIFLOWER, *SALINITY, *SALT, *COMPARATIVE studies
Abstract

Spectroradiometric measurements were taken from eggplant (Solanum melongena) and cauliflower (Brassica oleracea) plants in a controlled experiment treated with sodium chloride (NaCl) concentrations between 30 and 150 mmol. Assessment of seven vegetation indices indicated potential difference between three levels of salinity in effects, with the green indigo ratio (GIR of reflectance of 554 and 436 nm) yielding the most consistent results. Salinity effects started from the second week, but the highest differences were obtained in the fourth week for cauliflower and in the third and sixth weeks for eggplant. [ABSTRACT FROM AUTHOR]

Published
2011
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