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PERTEMUAN KE 5 – OPERASI MORFOLOGI

PENGOLAHAN CITRA

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

Tim Penyusun:

1. Atit Pertiwi

2. Condro Wibawa

3. Noor Vika H

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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R

P

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OPERASI MORFOLOGI

01

STRUCTURING ELEMENT

02

JENIS-JENIS OPERASI MORFOLOGI

03

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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OPERASI MORFOLOGI

01

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OPERASI MORFOLOGI

Operasi morfologi adalah serangkaian teknik dalam pengolahan citra yang didasarkan pada bentuk (shape) dan struktur objek dalam citra.

Biasanya diterapkan pada citra biner (hitam-putih), tetapi juga dapat digunakan pada citra grayscale.

Tujuan utamanya:

  1. Membersihkan noise kecil
  2. Menyambungkan atau memisahkan bagian objek
  3. Mengekstraksi bentuk atau struktur tertentu

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STRUCTURING ELEMENT

02

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OPERASI MORFOLOGI

Pada Operasi Morfologi,�kita mengenal istilah SE (Structuring Element),�atau semacam Kernel pada Operasi Konvolusi

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Structuring element (SE) bisa dianggap sebagai "stempel kecil" atau "alat penggesek" yang kita tempelkan ke sebuah citra untuk melihat bagaimana bentuk objek bereaksi.

Bayangkan kamu punya citra biner berupa kertas bergambar hitam-putih.

Lalu kamu punya cap karet kecil (structuring element).

Kamu gesek cap ini di atas gambar:

  • Kalau semua bagian cap yang padat (1) pas kena tinta hitam → cap itu "cocok" (untuk erosi).
  • Kalau ada sedikit saja bagian cap yang kena tinta hitam → berarti ada "cocok" (untuk dilasi).

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Dengan cara ini, SE jadi alat untuk mengecek apakah pola kecil sesuai dengan gambar besar.

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OPERASI MORFOLOGI

Serba-serb SE :

  • SE biasanya berbentuk kotak kecil (misalnya 3×3, 5×5).
  • Di dalamnya ada nilai 1 (aktif) dan 0 (tidak aktif).
  • Titik tengah SE disebut origin, dan itu yang menentukan posisi pergeseran di citra.

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OPERASI MORFOLOGI

Bentuk SE

  • SE biasanya berbentuk kotak kecil (misalnya 3×3, 5×5).
  • Di dalamnya ada nilai 1 (aktif) dan 0 (tidak aktif).
  • Titik tengah SE disebut origin, dan itu yang menentukan posisi pergeseran di citra.

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OPERASI MORFOLOGI

SE PERSEGI : �Ini bentuk SE paling dasar dan paling sering dipakai.

  • Menyentuh semua piksel di area kotak 3×3.
  • Cocok untuk efek merata ke semua arah (horizontal, vertikal, diagonal).
  • Bisa juga dibuat ukuran lebih besar (misalnya 5×5, 7×7) untuk efek lebih kuat.

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OPERASI MORFOLOGI

SE SILANG/PLUS:

  • Fokus hanya ke arah horizontal dan vertikal.
  • Tidak memperhitungkan diagonal.
  • Cocok untuk operasi morfologi pada objek yang cenderung lurus (misalnya teks).

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OPERASI MORFOLOGI

SE HORIZONTAL :

�Fokus ke arah horizontal saja, terdiri dari 5 pixel.

Cocok untuk:

  • Menghubungkan komponen yang sejajar mendatar
  • Menghapus noise vertikal kecil
  • Menebalkan garis hoizontal

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OPERASI MORFOLOGI

SE Vertical :

�Fokus ke arah vertikal saja, terdiri dari 5 pixel.

Cocok untuk:

  • Menghubungkan komponen yang sejajar berdiri
  • Menghapus noise horizontal kecil
  • Menebalkan garis vertikal

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OPERASI MORFOLOGI

SE Lingkaran :

�Membentuk efek bulat, lebih “halus” daripada kotak.

Cocok untuk:

  • Mengolah objek bulat atau organik
  • Mengurangi efek sudut tajam

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OPERASI MORFOLOGI

SE Bentuk Lainnya :

�Dan lain-lain, tergantung kebutuhan.�Bahkan bisa membuat bentuk custom sendiri

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JENIS-JENIS MORFOLOGI

02

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

OPENING�CLOSING�DILASI�EROSI�OPERASI LANJUTAN

Jenis Operasi Morfologi

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

Fungsi Operasi Morfologi,�secara umum

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UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

DILASI

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UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

DILASI

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Aplikasi :

  • Menutup lubang kecil di dalam objek
  • Menebalkan bentuk
  • Menyambungkan objek yang hampir menyatu

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JENIS MORFOLOGI

SE untuk DILASI

​

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UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

DILASI

​

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JENIS MORFOLOGI

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

EROSI

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

EROSI

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

EROSI

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

OPENING

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

OPENING

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UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

OPENING

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UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

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UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

CLOSING

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JENIS MORFOLOGI

CLOSING

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JENIS MORFOLOGI

CLOSING

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JENIS MORFOLOGI

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UNIVERSITAS GUNADARMA

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JENIS MORFOLOGI

Perbandingan Dilasi, Erosi, Opening, dan Closing

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JENIS MORFOLOGI

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

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TERIMA

KASIH

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA

Tim Penyusun:

1. Atit Pertiwi

2. Condro Wibawa

3. Noor Vika H

PROGRAM STUDI INFORMATIKA

UNIVERSITAS GUNADARMA