Jumat, 02 Oktober 2015

Leaf shape based plant species recognition



softscients - Itulah judul yang banyak berseliweran dan banyak dibahas dibeberapa paper yang intinya adalah membuat algoritma pengenalan jenis daun berdasarkan perhitungan fitur morfologinya. Penulis meng copy paste kan isi dari paper sebagai berikut: Digital morphology features extraction yang terdiri dari berikut dan untuk mencoba menggunakan persamaan tersebut diimplementasikan kedalam matlab

Disini hanya sampai pada tahap perhitungan morfologinya saja tidak sampai pada recognition, pada tahap recognitionnya, bisa kamu pakai dengan beragam metode yang ada saat ini baik supervised atau unsupervised learning bahkan statistika biasa



Pengukuran Aspect ratio (1)

The aspect ratio is a ratio between the maximum length Dmax and the minimum length Dmin of the minimum bounding rectangle (MBR)

Pengukuran Rectangularity  (2)

The rectangularity, representing the ratio of ROI area and the MBR area, is calculated by



Pengukuran Area ratio of convex hull  (3)

The area ratio of convex hull, representing the ratio of the ROI area AROI and the convex hull area AC, is calculated by
 




 

PengukuranPerimeter ratio of convex (4)


The perimeter ratio of convex hull, representing the ratio of the ROI perimeter PROI and the convexull perimeter PC, is calculated by
 





Pengukuran Sphericity

 The sphericity is defined as



where ri represents the radius of incircle of the ROI, and rc the radius of the excircle of the ROI.

Pengukuran Circularity

The circularity is defined by all of the bounding points of the ROI



where µR is the mean distance between the center of the ROI and all of the bounding points, and ƟR is the
quadratic mean deviation of the mean distance:



Pengukuran Eccentricity

The eccentricity is defined as the ratio of the length of main inertia axis of the ROI EA to the length of
minor inertia axis of the ROI EB



Pengukuran Form factor

The form factor is a popular shape description characteristic independent of linear transformations given By



Berikut contoh gambar daun yang digunakan dalam percobaan ini

Feature Extraction
aspect ratio : 1.4819
rectangularity : 0.70313
area ratio of convex hull : 0.37897
perimeter ratio of convexhull : 0.60063
Sphericity  : 0.67482
circularity  : 0.084613
form factor  : 0.76346




pengolahan citra digital dengan matlab









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