| 摘要 |
A method of assessing a spray using image processing techniques to analyze an image of an as-sprayed witness card 500, the witness card 500 having been sprayed with drops of a fluid, the method comprising preparing a calibration witness card 500 having a plurality of stains, wherein each stain is created with a known volume of a fluid, obtaining an as-sprayed witness card 500, wherein the as-sprayed witness card 500 includes a pattern of stains of the fluid, exposing the calibration witness card 500 to a backlight 625 sufficient to make the plurality of stains visible and, at the same time, capturing an image of the plurality of stains thereon, developing a calibration equation that is based on respective dimensions of the plurality of stains and known volume of the fluid for each stain, exposing the as-sprayed witness card 500 to a backlight 625 sufficient to make the pattern of stains thereon visible and, at the same time, capturing an image of the pattern of stains thereon, and processing the image of the pattern of stains on the as-sprayed witness card 500 using the calibration equation to assess characteristics of the stains of the fluid on the as-sprayed witness card 500 and thereby assess characteristics of the spray.
|
