Remote sensing and image interpretation, 7th edition is designed to be primarily used in two ways. History of aerial photography and aerial platforms 4. Elements of image interpretation x, y ltilocation survey it in the field using traditional surveying techniques or global positioning system gps instruments collect remote sensing data of the object register rectify the image to a basemap andcollect remote sensing data of the object, register rectify the image to a basemap, and. The user is present in both subprocesses but in each one they have a different task. Image interpretation, japan association of remote sensing. The proper watershed or river basin development of a management strategy requires accurate measurement of the past and present land useland cover changes of study area. This video lecture introduces students to the eight common elements of image interpretation. Know basics of remote sensing quickly and become expert. Image interpretation of remote sensing data geospatial world.
This process utilizes the human computer your brain to derive information through interpretation of the remote sensing. Image interpretation process incoming radiation characteristics reflection characteristics of the object image quality the interpreters skills and ability image interpretation process 1. Basic principles of image interpretation with examples and sample questions. Principles of remote sensing centre for remote imaging. Interpretation observation and inference depend on interpreters training, experience, bias, natural visual and analytical abilities. Elements of image interpretation remote sensing core. The remote sensing images, which are displayed in three primary colours red, green and blue is known as colour composite. Visual interpretation of remote sensing data with appropriate field checking is perhaps the best way to begin understanding what the imagery reveals for. We in interpretation are dedicated to conveying ageold stories and provoking people to think about our surroundings in new ways. Remote sensing and image interpretation t m lillesand.
Visual image interpretation text free download as pdf file. Visual interpretation of remote sensing data with appropriate field checking is perhaps the best way to begin understanding what the imagery reveals for agricultural applications. Examining satellite images on the weather report, or following high speed chases by views from a helicopter are all familiar examples of visual image interpretation. Remote sensing and image interpretation, 7th edition wiley.
Introduction, fundamentals of visual image interpretation, basic visual image interpretation equipments, land use land cover mapping, agricultural applications, environmental assessment. Differences of remote sensing and aerial photos, multispectral imaging and sonar are discussed. As we noted in the previous section, analysis of remote sensing imagery involves the identification of various targets in an image, and those. Texture is an important aid in visual image interpretation, especially for high spatial resolution imagery. Aerial photography vantage point, cameras, filters, and film 5. Here, the size, shape, and position of objects as well as the contrast and colour saturation are analysed. Elements of visual interpretation natural resources canada. The criteria for identification of an object with interpretation elements is called an interpretation key. Download remote sensing and image interpretation pdf.
Image interpretation is the process of examining an aerial photo or digital remote sensing image and manually identifying the features in that image. Observation and understanding of the basic elements of photo interpretation are critical. The computer aided techniques called digital image processing is simplifying the visual interpretation. Feature identification to support remote sensing image interpretation. Targets in remote sensing images may be any feature or object which can be observed in an image, and have the following characteristics. Mss 6 bits landsat tm 8 bits ikonos 11 bits ers sar 16 bits a key concept of remote sensing. Visual image interpretation, remote sensing and gis slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Digital image processing minakshi kumar photogrammetry and remote sensing division indian institute of remote sensing, dehra dun abstract. These land useland cover parameters determine the hydrological and ecological. Similarly interpretation of aerial photographs through 3d generation through visual studies. Human intervention is a requisite for visual image interpretation, where the interpreter actually performs the analysis.
Remote sensing and image interpretation t m lillesand from recent developments in digital image processing to the next generation of satellite systems, this book provides a comprehensive introduction to the field of remote sensing and image interpretation. The present trends and the outlook of remote sensing industry are briefed. The visual image processing is based on how the analyst views and interprets an image. This is the sensitivity to small differences in the radiation of an observed object. If you continue browsing the site, you agree to the use of cookies on this website. So visual interpretation of satellite image is important in remote sensing. What do you mean by visual interpretation of images. Image interpretation an overview sciencedirect topics. In this portion of the session, we will illustrate some ways you might use new tools borne of remote sensing, in your interpretive productsbe they programs, exhibits or writing.
Colour composite images and visual image interpretation. The term interpretation is derived from old french term interpretation or latin interpretation, and from the verb interpretari, literally means the action of explaining the meaning of something. Read download remote sensing and image interpretation pdf. Visual image interpretation and its key elements, introduction and basic character of digital image, image preprocessing and image registration. In general analog format in remote sensing data is. The satellite image can be analyzed using either the visual or the digital techniques.
Remote sensed data is the useful base for gis and facilitate visual image interpretation. Each group chooses a famous landsat scene from the earth as art collection. Image interpretation the most intuitive way to extract information from remote sensing images is by visual image inspection and interpretation, which is based on the human ability to relate colours and patterns in an image and to real world features. The height of objects can be determined by indirect visual analysis. Visual image interpretation, remote sensing and gis. Pdf the remote sensing images, which are displayed in three primary colours red, green and blue is known as colour composite images.
Four main types of information contained in an optical image are often utilized for image interpretation. Human visual or manual interpretation is still a dominant approach to daytoday applications of remote sensing. Visual image interpretationtext stereoscopy remote. Remote sensing and image interpretation slideshare. Image interpretation keys are typically project specific, and are most often employed in those cases where a group of image analysts are interpreting individual areas, but must generate a consistent product. Aerial photographic and satellite image interpretation. Provides an overview of image interpretation principles. Colour composite images and visual image interpretation content writer. The synergism of combining scientific knowledge with realworld analyst experience allows the interpreter to develop heuristic rules of thumb to extract information from the imagery. This mainly refers to its usage in military aerial reconnaissance using photographs taken from reconnaissance aircraft and satellites the principles of image interpretation have been developed empirically for more than 150 years. An often undervalued but inevitable component in remote sensing image analysis is human perception and interpretation. It involves identification of various objects on the terrain which may be natural or artificial consists of points, lines, or polygons. Photographic interpretation is the act of examining photographic images for the purpose of identifying objects and judging their significance colwell, 1997.
Identifying targets in remotely sensed images based on these visual elements allows us to further interpret and analyze. Image interpretation keys historically referred to as photo interpretation keys are designed to aid in the identification of features. Visual interpretation is a less controllable process, in which there are many factors. Digital image processing for image enhancement and information extraction summary digital image processing plays a vital role in the analysis and interpretation of remotely sensed data. Visual image interpretation brings to bear not only scientific knowledge but all of the experience that a person has obtained in a life time. To describe the elements of image interpretation eii and how they are used to derive information from imagery. You know that characteristics of images such as resolution determine the level of detail present in the remote sensing data and extraction of information from. Visual image interpretation is a first analysis approach to remote sensing imagery. This paper describes the basic technological aspects of digital image processing with special reference to satellite image processing. Image interpretation of remote sensing data is to extract qualitative and quantitative information from the photograph or imagery. Readings a description of the eii from the smithsonian institution how to interpret a satellite image article from nasa powerpoint slides slides describing and giving examples of. Much identification and interpretation of the targets in remote sensing are done by visual interpretation i. Digital image processing for image enhancement and. The international archives of the photogrammetry, remote sensing and spatial information sciences.