XVIIIth Congress: Commission VI

Kraus, Karl; Waldhäusl, Peter

Bibliographic data

Multivolume work

Persistent identifier:: 1667435949

Title:: XVIIIth Congress

Sub title:: Vienna, Austria 1996

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1667435949

Language:: English

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1677550198

Title:: Commission VI

Scope:: 149, 110, 92 Seiten

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1677550198

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(31,B6)

Language:: English

Additional Notes:: Die Vorlage enthält insgesamt 3 Werke: Commission VI (Seiten 1-149); National reports (Seiten 1-110); Special sessions (Seiten 1-92)

Other Title:: Enthaltendes Werk: National Reports; Enthaltendes Werk: Special sessions

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Economic, Professional, and Educational Aspects of Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Economic, Professional, and Educational Aspects of Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Economic, Professional, and Educational Aspects of Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Economic, Professional, and Educational Aspects of Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: Commission VI

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: ASEAN - AN IMAGE ANALYSIS SYSTEM FOR REMOTE SENSING TRAINING AND EDUCATION. Nguyen Dinh Duong [...], Shoji Takeuchi [...], Kohei Cho [...] Commision VI, Working group 2

Document type:: Multivolume work

Structure type:: Chapter

CO Band Interleaved by Line ; Number of Plxeis O Band Inter-eaved by Pixel i m n a Pixel Interval Distence [m] _ | |® Image Date Attached to the Header Line interval Distance [mj : © image Date in Separate Files Figure 1. Data conversion menu 3.2 Image Display There are two image file types that can be displayed: WinASEAN GIH and classified image WinASEAN CLS. WinASEAN GIH file is displayed by using Image display and classified image by Classified image display menu. Programs automatically detects whether input file is of suitable format for display or not. Another function for image display is Pseudo Color Image Display that is actually level slicing. The original GIH image is displayed in true color mode so number of slices can be up to 255. User selects certain gray value range and assigns it to arbitrary color. Under the Image display menu is there another function Image Display and Print. By this function user can display two image types: full color image with extension .GIH and classified image with extension .CLS and send them to system printer at selected scale. This is not hard copy as often used in many Windows application by PrintScreen or Alt+PrintScreen function. In order to print a image at exact scale program requires following input data: - Ground resolution of image (usually in meters) - Scale factor - Technical parameters of the system printer (supported by Windows) After program was informed about the above data, actual ground coverage of the image will be computed and transformed into printer resolution unit (dots per inch). The size of the selected area to be printed is input not in image but in printer resolution dimension. 3.3 Image Encoding Image encoding is a special technique used by WinASEAN to improve calculation speed of classification, image transform etc. After encoding, data in the WinASEAN GIH format is converted to WinASEAN CPT format with structure as follow : - Image header 1024 bytes - Encoded image data Number of lines * number of columns * code size in bytes - LUTI Look - up - table containing all Unique Pixel vectors ( UPV ) - LUT2 UPV frequency The code size used for encoded image data is of 2 or 3 bytes. UPV frequency is hold in table with type of 1, 2 or 3 bytes. During processing program works with look-up-table LUTI and LUT2 insteed with whole of image and then by index replacing technique, result image, for example, classified or principal component will be created. | Green Assigment. » | Blue Assigment.. b Figure 2. Image display menu 3.3 Arithmetic Operation Inter-channel or inter-image operation are very useful for image enhancement, feature extraction and multitemporal image analysis. Addition, subtraction, multiplication, division and their combination can be applied for many purposes, including noise elimination. In order to carry out the most different arithmetic operation either among bands of one image or among different bands of different images, the algorithm is divided into 3 steps. In the first step program prompts for input data, then a temporal image in .GIH format is created. In the second step program asks user to give actual formula which defines the arithmetic operation to be considered. In fact the formula is not limited on basic arithmetic operation only, but any mathematics expression of length up to 60 characters long and consisted of FORTRAN intrinsic functions can be supplied. The construction of the formula must follow strictly FORTRAN syntax. Program checks syntax of the input formula and if there is no error it proceeds to next step when actual computation will be realized. In order to prevent division by zero, all digital counts having values 0 is assigned 1 before calculation. 3.4 Multispectral Classification Multispectral classification is based on the Maximum likelihood classification method and consists of the following operation: - Training area selection - Training data statistics calculation - Training data redisplay for checking - Training data modification (if necessary) After checking training data and statistics computation the maximum likelihood classification can be carried out. Input files are image file in CPT format and training data (statistics) file. Output will be classified image in CLS format. WinASEAN 2.0 International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B6. Vienna 1996 can unk 3.5 mul betv

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fullscreen: Commission VI (Part B6)

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