Ekstraksi venasi pada citra daun dengan pemodelan b-spline berhasil diimplementasikan
Plus: automasi inisialisasi parameter pencarian awal
Hasil ekstraksi venasi citra daun secara umum kurang sesuai better capture of photos
Saran
ekstraksi bentuk dengan pendekatan kurva yang lain seperti pemodelanBezier
ekstraksi venasi pada citra daun yang lebih baik
Penelitian ukuran kesamaan antara satu set b-splinedengan satu set b-spline lainnya
menjadikan venasi dengan pemodelan b-spline sebagai penciri, bersama dengan penciri bentuk, untuk pengenalan jenis daun secara automatis.
Tinjauan Pustaka
Fourier Descriptors
Fourier descriptors describe the shape in terms of its spatial frequency content.
Begin by representing the boundary of the shape as a periodic function (in one of a few possible ways).
Expand this in a Fourier series; obtain a set of coefficients that capture shape information.
Fourier Descriptors (cont.)
imagining that the image plane is complex
Fourier Descriptors (cont.)
• The truncated series is
The period is made equal to 2π by choosing the speed at which we circumnavigate the shape properly
Fourier Descriptors (cont.)
The k-th Fourier transform coefficient is calculated as
Shape feature must be invariant to rotation, translation, and dilatation effect. For satisfying these, some adjustments on Fourier descriptors should be done
Fourier Descriptors (cont.)
B-Spline
Polynomial curves
Ck-1 continuity
Cubic B-spline:
C2 continuity
B-Spline (cont.)
Knots
• A sequence of scalar values t1, …, t2k with ti≠tj if i≠j, and ti< tj for i