Search results for " Images"
showing 10 items of 202 documents
Batch Methods for Resolution Enhancement of TIR Image Sequences
2015
Thermal infrared (TIR) time series are exploited by many methods based on Earth observation (EO), for such applications as agriculture, forest management, and meteorology. However, due to physical limitations, data acquired by a single sensor are often unsatisfactory in terms of spatial or temporal resolution. This issue can be tackled by using remotely sensed data acquired by multiple sensors with complementary features. When nonreal-time functioning or at least near real-time functioning is admitted, the measurements can be profitably fed to a sequential Bayesian algorithm, which allows to account for the correlation embedded in the successive acquisitions. In this work, we focus on appli…
POSSIBILITY OF THE USAGE OF THE VISUAL RESEARCH METHODS WITHIN THE DESIGN EDUCATION
2017
Young people are forming and will form the environment of today and tomorrow. This reinforces the necessity of the young generation’s active involvement in the promotion of positive change. This approach cannot be otherwise as systemic and impossible without research and data analysis. Visual research methods, which are self-evident in design and art, are widely used in a number of other disciplines. To achieve an objective and reliable results, they often are combined with quantitative, analytic, generative and other methods. The aim of the paper - to discuss the ways of visual research methods' use in combination with systemic design thinking approach in finding new solutions in promotion…
“ἔργον τόδ᾽ ἐϋγραφὲς Ζανὶ ἀνέθεντο” (Anth. Pal. VI 221). Continuità morfologiche e funzionali negli ex voto figurativi
2022
Gli ex voto dipinti sono un oggetto di culto dalla lunga storia. Esempi di questo tipo di ex-voto, largamente utilizzati fino alla fine dell'Ottocento nell'Italia meridionale e in altre regioni dell'Europa meridionale, sono infatti già attestati nel mondo classico (pinakes, tabellea pictae). Nel passaggio tra il mondo "pagano" e il mondo "cristiano", nel mutare dei referenti divini e delle teologie, si osserva una continuità dei simboli rituali e delle pratiche votive e, più in generale, una significativa persistenza di forme, funzioni e significati in campo religioso. The painted ex-votos are a cult object with a long history. Examples of this type of ex-voto, widely used up to the end of …
«Portavano pitture della disgrazia sofferta». Divagazione sulle continuità e sulle trasformazioni degli exvoto figurativi
2021
Gli ex voto dipinti costituiscono un oggetto cultuale dalla lunga storia. Esempi di questa tipologia di ex voto, ampiamente in uso fino a tutto il xix secolo, e oggi in minor misura, nel Meridione d’Italia e in altre regioni del Sud Europa, sono infatti già attestati nel mondo classico (pinakes, tabellea pictae). Nel passaggio tra mondo «pagano» e mondo «cristiano», nel mutare dei referenti divini e delle teologie, si osserva una continuità dei simboli rituali e delle pratiche votive e, più in generale, una significativa persistenza delle forme, delle funzioni e dei significati cultuali delle immagini in ambito religioso. The painted ex-votos are a cult object with a long history. Examples …
Observing animals and humans : dogs target their gaze to the biological information in natural scenes
2020
Background This study examines how dogs observe images of natural scenes containing living creatures (wild animals, dogs and humans) recorded with eye gaze tracking. Because dogs have had limited exposure to wild animals in their lives, we also consider the natural novelty of the wild animal images for the dogs. Methods The eye gaze of dogs was recorded while they viewed natural images containing dogs, humans, and wild animals. Three categories of images were used: naturalistic landscape images containing single humans or animals, full body images containing a single human or an animal, and full body images containing a pair of humans or animals. The gazing behavior of two dog populations,…
Mapping snow density through thermal inertia observations
2023
Snow, as a fundamental reservoir of freshwater, is a crucial natural resource. Specifically, knowledge of snow density spatial and temporal variability could improve modelling of snow water equivalent, which is relevant for managing freshwater resources in context of ongoing climate change. The possibility of estimating snow density from remote sensing has great potential, considering the availability of satellite data and their ability to generate efficient monitoring systems from space. In this study, we present an innovative method that combines meteorological parameters, satellite data and field snow measurements to estimate thermal inertia of snow and snow density at a catchment scale.…
A robust blind 3-D mesh watermarking based on wavelet transform for copyright protection
2019
Nowadays, three-dimensional meshes have been extensively used in several applications such as, industrial, medical, computer-aided design (CAD) and entertainment due to the processing capability improvement of computers and the development of the network infrastructure. Unfortunately, like digital images and videos, 3-D meshes can be easily modified, duplicated and redistributed by unauthorized users. Digital watermarking came up while trying to solve this problem. In this paper, we propose a blind robust watermarking scheme for three-dimensional semiregular meshes for Copyright protection. The watermark is embedded by modifying the norm of the wavelet coefficient vectors associated with th…
Hybrid blind robust image watermarking technique based on DFT-DCT and Arnold transform
2018
In this paper, a robust blind image watermarking method is proposed for copyright protection of digital images. This hybrid method relies on combining two well-known transforms that are the discrete Fourier transform (DFT) and the discrete cosine transform (DCT). The motivation behind this combination is to enhance the imperceptibility and the robustness. The imperceptibility requirement is achieved by using magnitudes of DFT coefficients while the robustness improvement is ensured by applying DCT to the DFT coefficients magnitude. The watermark is embedded by modifying the coefficients of the middle band of the DCT using a secret key. The security of the proposed method is enhanced by appl…
Multispectral image denoising with optimized vector non-local mean filter
2016
Nowadays, many applications rely on images of high quality to ensure good performance in conducting their tasks. However, noise goes against this objective as it is an unavoidable issue in most applications. Therefore, it is essential to develop techniques to attenuate the impact of noise, while maintaining the integrity of relevant information in images. We propose in this work to extend the application of the Non-Local Means filter (NLM) to the vector case and apply it for denoising multispectral images. The objective is to benefit from the additional information brought by multispectral imaging systems. The NLM filter exploits the redundancy of information in an image to remove noise. A …
Extending the Unmixing methods to Multispectral Images
2021
In the past few decades, there has been intensive research concerning the Unmixing of hyperspectral images. Some methods such as NMF, VCA, and N-FINDR have become standards since they show robustness in dealing with the unmixing of hyperspectral images. However, the research concerning the unmixing of multispectral images is relatively scarce. Thus, we extend some unmixing methods to the multispectral images. In this paper, we have created two simulated multispectral datasets from two hyperspectral datasets whose ground truths are given. Then we apply the unmixing methods (VCA, NMF, N-FINDR) to these two datasets. By comparing and analyzing the results, we have been able to demonstrate some…