The amplitude of the ellipse roundness is defined as [delta] = [delta]1 + [delta]2 where [delta]1 is the distance between the major axis endpoint Ato the ideal circular profile and [delta]2 is the distance between the minor axis
endpoint B and the ideal circular profile.
Canny edge detection was used to identify features at the center of the seed namely maximum length of detected edge, ratio major and minor axis
, number of pixel, maximum convolution, and number of intersection.
The features included Perimeter, Area, Major axis length, Minor axis
length, Filled area, Orientation, Equiv diameter, Euler number, Solidity, Extent, Eccentricity and Convex Area (Russ, 1999).
0,1,0] in figure 7, also having an oblate spheroidal shape with minor axis
The major and minor axis
angles (the smallest angle between the arm cranking and the major or minor axis
, respectively) were 96.
The measurements most commonly used are Feret's diameter, by calculating the major axis and the minor axis
(Zheng et al.
ellipse(81,70,16,32); // Draw the left eye with an ellipse at coordinates (x,y) = (81,70) and minor axis
of length 16 and major axis of length 32
The length of the probe's minor axis
was, respectively, at 1, 2, 4, 5, 6, 10, and 20 cm, while that of its major axis along the z-direction was 52 cm.
The basic dry-spinning equations have been developed on our previous work , the glass transition temperature and imidization degree of the precursor fibers are related to solvent mass fraction and curing temperature , and the final imidization degree of precursor fiber is taken from our experimental data , Here, the arithmetic mean of major axis and minor axis
are used to substitute for the fiber radius, and the profile degree equation of cross section is derived to calculate the fiber shape change.
Figure 3 shows a cross section, representing the dome of a cabochon, taken on the vertical plane of the minor axis
and parallel to the horizontally oriented fibrous inclusions or structure (hereafter termed fibres), one of which is indicated by the short black line.
If X represents the ratio between the major to minor axis
of an ellipsoid, then X can be deduced from Q by using the following formula 
The extraction of individual morphological characteristics of weedy rice seeds variants were carried out to extract individual seed length, width, rectangular aspect ratio, major axis length, minor axis
length and aspect ratio [3, 4].