搜索结果: 1-15 共查到“测绘科学技术 shadow”相关记录26条 . 查询时间(0.211 秒)
BUILDING SHADOW DETECTION FROM GHOST IMAGERY
Ghost image Interior and exterior orientation elements Zenith angle of sun Region growing method Urban large-scale aerial imagines
2018/5/17
Shadow is one of the basic features of remote sensing image, it expresses a lot of information of the object which is loss or interference, and the removal of shadow is always a difficult problem to r...
ANALYZING SPECTRAL CHARACTERISTICS OF SHADOW AREA FROM ADS-40 HIGH RADIOMETRIC RESOLUTION AERIAL IMAGES
Shadow shadow spectra ADS-40 high radiometric resolution
2016/11/23
The shadows in optical remote sensing images are regarded as image nuisances in numerous applications. The classification and interpretation of shadow area in a remote sensing image are a challenge, b...
CLOUD AND CLOUD SHADOW MASKING USING MULTI-TEMPORAL CLOUD MASKING ALGORITHM IN TROPICAL ENVIRONMENTAL
Multitemporal Cloud Masking Algrithm Cloud Cloud Shadow
2016/7/8
A cloud masking approach based on multi-temporal satellite images is proposed. The basic idea of this approach is to detect cloud and cloud shadow by using the difference reflectance values between cl...
ANISOTROPIC SCATTERING SHADOW COMPENSATION METHOD FOR REMOTE SENSING IMAGE WITH CONSIDERATION OF TERRAIN
Soft Shadow Shadow Compensation Anisotropy Diffuse Solar Radiation Sky View Factor
2016/7/4
With the rapid development of sensor networks and earth observation technology, a large quantity of high resolution remote sensing data is available. However, the influence of shadow has become increa...
WAVELET ENHANCEMENT OF CLOUD-RELATED SHADOW AREAS IN SINGLE LANDSAT SATELLITE IMAGERY
Wavelet image fusion shadow frequency decomposition Landsat
2015/12/31
Cloud-related shadows represent areas with low illumination conditions that affect remote sensing image quality. In this research, a wavelet-based image sharpening algorithm was developed to enhance s...
Research on the Building Shadow Extraction and Elimination Method
Building Shadow Extraction Shadow Removal Multiple Constraints Edge Detection
2015/12/9
This paper first generalizes the significance and present research situation of the building shadow extraction and elimination method. Then, an approach of automatic extracting shadows of building fro...
Rendering 3D Vector Data Using the Theory of Stencil Shadow Volume
Stencil Buffer Shadow Volume Vector Data Real-time Visualization Terrain Rendering
2015/12/2
In geographical information systems vector data has important applications in the analysis and management of virtual landscapes. Therefore, methods that allow combined visualization of terrain and geo...
Shadow Detection of Urban Aerial Images Based on Partial Differential Equations
Shadow Detection Urban Aerial Image Partial Differential Equations Image Understanding Feature Detection
2015/12/2
Shadow detection plays an important role in digital aerial image processing. In this paper, shadow is treated as a special kind of image degradation. Shadow region commonly has lower brightness than n...
QUANTITATIVE ANALYSIS OF SHADOW EFFECTS IN HIGH-RESOLUTION IMAGES OF URBAN AREAS
Shadow Object Extraction High resolution Classification Land Cover LIDAR
2015/8/3
Shadow effects have drawn much attention by researchers with increasing use of high-resolution remote sensing images of urban areas. For correction or compensation to pixels that falling in shadow are...
AUTOMATIC EXTRACTION OF SHADOW REGIONS IN HIGH-RESOLUTION ADS40 IMAGES - By Robust Approach of Feature Spaces Analysis
Vision Urban detection extraction
2015/6/2
Due to high object density and high proportion of shadow-covered areas, it is usually quite difficult to extract information in urban
high-resolution airborne images from Leica Geosystems' airborne ...
A SYSTEM OF THE SHADOW DETECTION AND SHADOW REMOVAL FOR HIGH RESOLUTION CITY AERIAL PHOTO
Aerial OrthoImage High resolution Surface
2015/6/2
This paper presents a methodology to automatically detect and remove the shadows in high-resolution urban aerial images for urban
GIS applications. The system includes cast shadow computation, image...
AUTOMATED PRODUCTION OF CLOUD-FREE AND CLOUD SHADOW-FREE IMAGE MOSAICS FROM CLOUDY SATELLITE IMAGERY
Mosaic Feature Detection Algorithms
2015/6/2
The humid tropical region is always under partial or complete cloud covers. As a result, optical remote sensing images of this region
always encounter the problem of cloud covers and associated shad...
RESTITUTION OF INFORMATION UNDER SHADOW IN REMOTE SENSING HIGH SPACE RESOLUTION IMAGES: APPLICATION TO IKONOS DATA OF SHERBROOKE CITY
Restitution Spatial High Resolution
2015/6/1
hadow regions are very present in the high spatial resolution images, particularly in urban environment. Shades have negative effects.
They strongly disturb the classical techniques of image analysi...
SHADOW DETECTION IMPROVEMENT USING SPECTRAL INDICES AND MORPHOLOGICAL OPERATORS IN URBAN AREAS IN HIGH RESOLUTION IMAGES
Shadow detection high resolution
2015/5/6
While high-resolution remote sensing images have increased application possibilities for urban studies, the large number of shadow areas has created challenges to processing and extracting informati...
SHADOW DETECTION FROM VERY HIGH RESOLUTON SATELLITE IMAGE USING GRABCUT SEGMENTATION AND RATIO-BAND ALGORITHMS
VHR Satellite Imagery Shadow Detection Shadow Context Image Segmentation Grab Cut partitioning Urban Area WorldView-3
2015/4/1
Very-High-Resolution (VHR) satellite imagery is a powerful source of data for detecting and extracting information about urban constructions. Shadow in the VHR satellite imageries provides vital infor...