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Rs1 image interpretation and processing

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3/28/2016 ALP 2206: Remote Sensing 1 1. Elements of Aerial photo and Image interpretation 2. Image processing By P. K. Wanyoike 1. Basic elements of visual Aerial photos and image interpretation Introduction • Although in recent times, there has been a shift to digital techniques, Visual or Manual image interpretation has been used effectively for a long time. The elements are – – – – – – – Tone Size Shape Texture Pattern Shadow Site and association Tone (also called Color or Hue). • Tone refers to the relative brightness or color of elements on a photograph. Some objects appear darker and more crisp than others. 1 3/28/2016 Elements of visual Aerial photos and image interpretation Size. • The size of objects must be considered in the context of the scale of a photograph. The scale will help you determine if an object is a small pond or a large lake. Major highways can be distinguished from smaller roads. Long rivers can be distinguished from smaller tributaries. Shape. • Shape refers to the general outline of objects. Regular geometric shapes are usually indicators of human presence and use. – – – – Agricultural areas tend to have geometric shapes like rectangles and squares. Streams are linear (line) features that can have many bends and curves. Roads frequently have fewer curves than streams. Some objects can be identified almost solely on the basis of their shapes.    KICC, or Hilton Hotel in Nairobi Football fields highw ...
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