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All Journal Rekursif: Jurnal Informatika Communications in Science and Technology Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI) Medika Teknika : Jurnal Teknik Elektromedik Indonesia
Oktoeberza, Widhia KZ
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Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering

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Journal : Communications in Science and Technology

 1 
Automated localisation of optic disc in retinal colour fundus image for assisting in the diagnosis of glaucoma Listyalina, Latifah; Nugroho, Hanung Adi; Wibirama, Sunu; Oktoeberza, Widhia KZ
Communications in Science and Technology Vol 2 No 1 (2017)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.2.1.2017.43

Abstract

Optic disc (OD), especially its diameter together with optic cup diameter can be used as a feature to diagnose glaucoma. This study contains two main steps for optic disc localisation, i.e. OD centre point detection and OD diameter determination.  Centre point of OD is obtained by finding brightness pixel value based on average filtering.  After that, OD diameter is measured from the detected optic disc boundary.  The proposed scheme is validated on 30 healthy and glaucoma retinal fundus images from HRF database.  The results are compared to the ground truth images.  The proposed scheme obtains evaluation result (E) for healthy and glaucoma images is 0.23 and 0.21, respectively.  These results indicate successful implementation of automated OD localisation by detecting OD centre point and determining OD diameter.
Interference effect during word-task and colour-task in incongruent stroop-task Hotama, Christianus Frederick; Nugroho, Hanung Adi; Soesanti, Indah; Oktoeberza, Widhia KZ
Communications in Science and Technology Vol 2 No 2 (2017)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.2.2.2017.59

Abstract

Stroop-task is one of the most popular studies to check the ability of decision-making and cognitive process during high interference activity in the brain.  In the incongruent Stroop-task, the difference between the colour that we read and the colour that we see produces high interference activities in the brain.  This research aims to analyse the activity differences in each part of the brain during colour-task and word-task.  This study investigates how well the ability of decision-making and cognitive process during high interference activities that occur in the brain.  Electroencephalography (EEG) can record brain activities by recording the brain waves.  The results show that recognising the colour is more difficult than that of the written words in the Stroop-task as indicated by statistical test with t-value greater than threshold value (t>2.0027) and significant level of 0.05.  This study concludes that the colour-task gives more interference effect than the word-task.  The more interference effect is produced, the more wrong decision-making is obtained. 
Dark lesion elimination based on area, eccentricity and extent features for supporting haemorrhages detection Yulyanti, Vesi; Adi Nugroho, Hanung; Ardiyanto, Igi; Oktoeberza, Widhia KZ
Communications in Science and Technology Vol 4 No 1 (2019)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (410.365 KB) | DOI: 10.21924/cst.4.1.2019.110

Abstract

One of the complications due to the long-term of diabetes is retinal vessels damaging called diabetic retinopathy. It is characterised by appearing the bleeding spots in the large size (haemorrhages) on the surface of retina. Early detection of haemorrhages is needed for preventing the worst effect which leads to vision loss. This study aims to detect haemorrhages by eliminating other dark lesion objects that have similar characteristics with haemorrhages based on three features, i.e. area, eccentricity and extent features. This study uses 43 retinal fundus images taken from DIARETDB1 database. Based on the validation process, the average level of sensitivity gained is 80.5%. These results indicate that the proposed method is quite capable of detecting haemorrhages which appear in the retinal surface.
Co-Authors Aan Erlansari Afdhal Kurniawan Mainil Aliana, Mareta Butar Butar, Federika Dartiko, Fedryanto Desi Andreswari Dwi Jayanto, Paksi Ernawati Ernawati Funny Farady Coastera Gita Fitria, Nabila Hanung Adi Nugroho Hijrayanti, Hikmah Hotama, Christianus Frederick Huda, Widya Nurul Igi Ardiyanto Ikhsan, Arif Rahmat Indah Soesanti Julia Purnama Sari Julia Purnama Sari Listyalina, Latifah Luthfi, Irfan Muthi, Marsa Hulwa Indri Pradana, Refki Jorgi Rahman, Muhammad Farchan Al Saputri, Dian Ardiyanti Sari, Renti Epana Sunu Wibirama Syahputra, Wahyu Vasiguhamiaz, Azvadennys Yulyanti, Vesi Zarah Juaita, Aisyah Amelia