What is classification of remote sensing data?
Digital image classification is the process of assigning a pixel (or groups of pixels) of remote sensing image to a land cover class. The objective is to classify each pixel into only one class (crisp or hard classification) or to associate the pixel with many classes (fuzzy or soft classification).
What is supervised image classification in remote sensing?
Supervised image classification is a procedure for identifying spectrally similar areas on an image by identifying ‘training’ sites of known targets and then extrapolating those spectral signatures to other areas of unknown targets.
What is image classification GIS?
Image classification refers to the task of extracting information classes from a multiband raster image. The resulting raster from image classification can be used to create thematic maps. The recommended way to perform classification and multivariate analysis is through the Image Classification toolbar.
How are image classification techniques used in remote sensing?
Image classification is the process of assigning land cover classes to pixels. For example, classes include water, urban, forest, agriculture and grassland. The 3 main image classification techniques in remote sensing are: Unsupervised and supervised image classification are the two most common approaches.
Which is an important function of remote sensing?
One of the most important functions of remote sensing data is the production of Land Use and Land Cover maps and thus can be managed through a process called image classification. This paper looks into the following components related to the image classification process and procedures and image classification techniques and
How are pixel and reflectance used in remote sensing?
In the context of remote sensing, pixel is the ground area corresponding to one number of a digital image data set. The idea behind image classification is that different features on the earth’s surface have a different spectral reflectance (Lillesand and Keifer, 2004).
How big can a remote sensing image be?
SAR image and two remote sensing images with size 256 × 256 were used to validate the developed algorithm. The results were compared with MOCK, GAC, and KM. All the algorithms use the same preprocessing, 30 independent runs on each test image are performed.
