Essays about: "image differencing"

Showing result 1 - 5 of 10 essays containing the words image differencing.

  1. 1. Damage Assessment of the 2022 Tongatapu Tsunami : With Remote Sensing

    University essay from KTH/Geoinformatik

    Author : Milton Larsson; [2022]
    Keywords : remote sensing; land cover classification; Sentinel-1; Sentinel-2; change detection; change vector analysis;

    Abstract : The Island of Tongatapu, Tonga, was struck by a tsunami on January 15, 2022. Internet was cut off from the island, which made remote sensing a valuable tool for the assessment of damages. Through land cover classification, change vector analysis and log-ratio image differencing, damages caused by the tsunami were assessed remotely in this thesis. READ MORE

  3. 2. Direct multispectral photogrammetry for UAV-based snow depth measurements

    University essay from KTH/Geoinformatik

    Author : Kathrin Maier; [2019]
    Keywords : Unmanned Aerial Vehicles UAV ; snow depth; direct photogrammetry; multispectral imagery; cryosphere;

    Abstract : Due to the changing climate and inherent atypically occurring meteorological events in the Arctic regions, more accurate snow quality predictions are needed in order to support the Sámi reindeer herding communities in northern Sweden that struggle to adapt to the rapidly changing Arctic climate. Spatial snow depth distribution is a crucial parameter not only to assess snow quality but also for multiple environmental research and social land use purposes. READ MORE

  4. 3. Automatic Classification and Visualisation of Gas from Infrared Video Data

    University essay from KTH/Skolan för teknik och hälsa (STH)

    Author : Niklas Bährecke; [2015]
    Keywords : ;

    Abstract : Optical gas imaging denotes the visualisation of gases by means of an infrared camera, which allows operators to quickly, easily, and safely scan a large area and therefore plays a major role in the early detection and repair of gas leaks in various environments within the petrochemical industry such as processing plants and pipelines, but also in production facilities and hospitals. Thereby they help to avert damage to the environment as well as to health and safety of workers or inhabitants of nearby residential areas. READ MORE

  5. 4. Mapping Landcover/Landuse and Coastline Change in the Eastern Mekong Delta (Viet Nam) from 1989 to 2002 using Remote Sensing

    University essay from KTH/Samhällsplanering och miljö

    Author : ARFAN SOHAIL; [2012]
    Keywords : REMOTE SENSING; GIS; LANDCOVER LANDUSE CHANGE; ACCURACY ASSESSMENT; CHANGE DETECTION; COASTLINE CHANGE; HISTOGRAM; IMAGE THRESHOLD; BAND RATIO; MEKONG RIVER DELTA; VIETNAM; MAPPING; IMAGE DIFFERENCING; CLASSIFICATION; MAXIMUM LIKELIHOOD; POST CLASSIFICATION COMPARISON; SEA LEVEL RISE; OVERALL ACCURACY; LANDSAT TM; ETM ; PRE-PROCESSING; RADIOMETRIC NORMALIZATION; NDVI; NDSI; NDWI; IMAGE MASK;

    Abstract : There has been rapid change in the landcover/landuse in the Mekong delta, Viet Nam. The landcover/landuse has changed very fast due to intense population pressure, agriculture/aquaculture farming and timber collection in the coastal areas of the delta. READ MORE

  6. 5. Image Compression by Using Haar Wavelet Transform and Singualr Value Decomposition

    University essay from Institutionen för datavetenskap, fysik och matematik, DFM

    Author : Zunera Idrees; Eliza Hashemiaghjekandi; [2011]
    Keywords : Multi resolution analysis; Haar wavelet transformation MRA ; Average and difference method; Singular value decomposition SVD .;

    Abstract : The rise in digital technology has also rose the use of digital images. The digital imagesrequire much storage space. The compression techniques are used to compress the dataso that it takes up less storage space. In this regard wavelets play important role. READ MORE