| 发明名称 |
A METHOD AND DEVICE TO ASCERTAIN PHYSICAL CHARACTERISTICS OF POROUS MEDIA |
| 摘要 |
Four illuminators A, B, C and D direct collimated illuminating beams to a point O at the centre of a sample 40 and have projections onto the plane of the surface of the sample 40 at points A1, B1, C1, and D1. Angles <AOA1, <BOB1, <COC1, and <DOD1 have the same value of 45°. A camera 41 located directly above the point O acquires four images as the illuminators are individually illuminated. A processing section receives the acquired image data on line 42 and, after filtering, a common point distribution is evaluated based on the common points in the light intensity distribution data of two pairs of images with opposite illumination directions A & C, B & D. At the same time, an edge enhancing distribution is evaluated based on the opposing value points in the light intensity distribution data for the opposing directions. These two distributions are combined and after thresholding, a binarised distribution is produced which is analysed. From this, pore size distribution, grain size distribution and porosity of the sample can be found. |
| 申请公布号 |
WO03065017(A3) |
申请公布日期 |
2003.09.04 |
| 申请号 |
WO2003GB00447 |
申请日期 |
2003.01.31 |
| 申请人 |
ABERDEEN UNIVERSITY;HURST, ANDREW;GRANDJEAN, VALERIE;KOVALCHUK, ALEXANDER;PLAYER, MICHAEL;WATSON, JOHN |
发明人 |
HURST, ANDREW;GRANDJEAN, VALERIE;KOVALCHUK, ALEXANDER;PLAYER, MICHAEL;WATSON, JOHN |
| 分类号 |
G01N33/24;G06T7/00;G06T7/40;G06T7/60 |
主分类号 |
G01N33/24 |
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