3. Satellite Image Processing
Satellite image processing is crucial for extracting valuable information from raw data acquired by remote sensing satellites, impacting various sectors like urban planning and environmental monitoring. The chapter details various image processing techniques, sensor types, and the applications of satellite imagery, highlighting the importance of systematic methods for accurate data interpretation and decision making.
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What we have learnt
- Satellite image processing encompasses the acquisition, enhancement, analysis, and interpretation of imagery from remote sensing satellites.
- Various types of satellite sensors include passive and active sensors, and different imagery types such as multispectral and hyperspectral.
- Techniques such as radiometric, geometric, and atmospheric corrections are vital for ensuring image data's accuracy and reliability.
Key Concepts
- -- Passive Sensors
- Sensors that rely on natural radiation, such as sunlight, and include optical and thermal infrared sensors.
- -- Multispectral Imagery
- Imagery that captures data in multiple spectral bands, generally 3 to 10, as seen in systems like Landsat.
- -- Supervised Classification
- A classification method that involves user-defined training data to categorize satellite images into predefined classes.
- -- Image Fusion
- The technique of combining data from multiple sensors to produce a higher resolution image.
- -- Change Detection
- A method to identify differences in the state of an object or phenomenon by observing it at different times using satellite imagery.
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