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Milad Rafiee - IEEE Xplore Author Profile

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Change detection on satellite image series is a much more complex problem than detecting changes in color or illumination. First, it is subject to common problems inherent to image series: images are generally not well aligned, changes in atmospheric conditions impact the colors and overall contrast of images, and clouds can partially or totally obstruct the areas of interest. Secondly, noise in s...Show More
A key limitation of supervised learning is the ability to handle data from unknown distributions. Often, such methods fail when presented with samples from a source not represented in the training data. This work proposes an effective way of controlling the behavior of a neural network in the presence of out-of-distribution examples. For this, the training dataset is supplemented with extraneous d...Show More
Unsupervised learning based on Contrastive Learning (CL) has attracted a lot of interest recently. This is due to excellent results on a variety of subsequent tasks (especially classification) on benchmark datasets (ImageNet, CIFAR-10, etc.) without the need of large quantities of labeled samples. This work explores the application of some of the most relevant CL techniques on a large unlabeled da...Show More
ESA's Sentinel- 2 satellites have been in orbit for five years, acquiring huge amounts of data all over the world. They are a formidable tool for mass detection as they are freely available. Given their importance in the energetic transition and their spread over countries or continents, wind turbines are natural candidates for such studies. We propose an automatic wind turbine detector for low re...Show More
Neural network methods are nowadays used for a wide variety of tasks, in particular in computer vision. Among those tasks, semantic segmentation aims at labeling every pixel in an image, giving a good understanding of the scene. In this paper, we propose to use two neural network architectures designed for semantic segmentation to detect oil tank depots in Sentinel-2 images. We compare the methods...Show More
The energy sector is a key industry in the global economy and monitoring oil storage provides valuable insights into the economic state of a country. Our aim is to detect oil tank farms as accurately as possible using Sentinel-2 images. An a contrario clustering method is used to group by density the result of a circle detection step. Then, a patch-match procedure is used to complete the tank dete...Show More
There has been this last decade a major improvement in earth observation imagery, both in terms of resolution and revisit rate. This technological leap comes with an increasing demand for detecting objects in satellite images. In this context, vehicle detection generates a great deal of interest in the scientific and industrial community. Indeed, detecting vehicles can have a range of applications...Show More
This paper presents a method for estimating the occupancy ratio of parkings lots from satellite images. The algorithm takes as input a series of PlanetScope images along with a mask indicating where the parking is positioned and returns for each image an occupancy ratio. The method is generic, doesn't require any calibration and can easily be extended. For validating our results, we have created a...Show More
Monitoring oil stocks provides valuable insights on the balance between production and demand of petroleum products. The identification of oil depots is important for estimating storage capacities and measuring oil stocks. To achieve this purpose, we present an oil tank detector. As oil tanks are generally circular, we use as a first step a circle detection algorithm. However, this approach tends ...Show More
These last years, earth observation imagery has significantly improved. Public satellites such as WorldView-3 can now produce images with a Ground Sample Distance of 31cm, reaching a resolution equivalent to aerial images. Perhaps more importantly, the revisit frequency has also been greatly enhanced: providers such as Planet can now acquire images of a given ground location on a daily basis. Thes...Show More