图像处理_RainStreakTextureDatabase(哥伦比亚大学雨量纹理数据库).pdfVIP

Rain Streak Texture Database(哥伦比亚大学雨量纹 理数据库) 数据摘要： The database captures the effects of lighting direction, camera viewing direction and oscillations parameters on the appearance of rain streaks. For capturing variation in appearance due to lighting, the elevation angle of source is varied from -90 degrees to 90 degrees and azimuthal angle of the source is varied from 10 degrees to 170 degrees both with steps of 20 degrees. To capture the effects of the viewing direction, we varied camera elevation angle from 0 degrees to 80 with steps of 20 degrees. For each light and view configuration we render 10 images to capture the appearance variation due to oscillations. Thus the database samples the streak appearance in the 4 dimensions. The database streaks are rendered for drop of size 1.6mm and camera exposure time of 1/60 sec. It also includes streaks rendered under ambient lighting. The streaks are rendered as 16-bit monochrome images with maximum resolution of 32 times 1050 pixels. In total, the database includes 3150 streak images. The database also includes at 3 additional (lower) resolutions with streak widths of 16, 8 and 4, to avoid artifacts due to severe down-sampling when rendering streaks far from the camera. The complete database is about 50 MB in size. The streaks are in .png format. 中文关键词： 光照方向,相机视点,振幅,参数,雨点, 英文关键词： lighting direction ，camera viewing,oscillations parameters,rain streaks, 数据格式： IMAGE 数据用途： Using these parameters, we have rendered thousands of rain streaks to create a database that captures the variations in streak appearance with respect to lighting and viewing directions.effects is a challenging problem. 数据详细介绍： Rain Streak Texture Database About the Database The database captures the effects of lighting direction, camera viewing direction and oscillations parameters on the appearance of rain streaks. For capturing v