• A MatLab code is used to identify edge of spray and calculate the spray cone angle from the images.


• Images are first converted to binary (black and white) scale and morphological corrections are applied to identify the spray regions.


• Edge detection by Sobel algorithm identifies the spray fringe contours from which the full cone angle (a) is determined.

• Cone angle remains fairly constant with GLR.

Spray image cannot be captured from above the atomizer.

• Image taken at an angle, ?.


• Apply perspective correction to obtain actual image from tilted image.








• Intensity variation across the length of gray scale image plotted at different heights from the center of the spray having intervals of 100 pixels.


• Intensity maximizes at the spray center and decreases asymptotically.






Spray uniformity index (SUI)





Spray uniformity is dictated by SUI, smaller number indicates more uniformity.