scholarly journals OPTIMASI ALGORITMA LEARNING VECTOR QUANTIZATION (LVQ) DALAM PENGKLASIFIKASIAN CITRA DAGING SAPI DAN DAGING BABI BERBASIS GLCM DAN HSV

2018 ◽  
Vol 9 (1) ◽  
pp. 1-10
Author(s):  
Usman Sudibyo ◽  
Desi Purwanti Kusumaningrum ◽  
Eko Hari Rachmawanto ◽  
Christy Atika Sari
Keyword(s):  
Vector Quantization ◽  
Region Of Interest ◽  
Learning Vector Quantization ◽  
Gray Level ◽  
Minimum Error ◽  
Occurrence Matrix

Meningkatnya kebutuhan daging sapi, berdampak pada harga daging sapi. Harga daging sapi yang terus menerus mengalami kenaikan, tentunya menyebabkan penurunan penjualan daging sapi. Untuk mengantisipasi hal tersebut, maka beberapa pedagang mencampurkan daging sapi dengan daging babi. Dipilihnya daging babi, karena harga daging babi lebih murah dan warna serta tekstur daging babi yang mirip dengan daging sapi. Secara kasat mata daging sapi dan daging babi sulit untuk dibedakan bagi orang awam. Oleh karena itu, perlu adanya sistem yang dapat membedakan kedua daging. Penelitian ini menggunakan metode klasifikasi untuk membedakan kedua daging. Metode klasifikasi menggunakan algoritma Learning Vector Quantization. Dan penelitian ini memiliki tiga tahapan utama seperti preprocessing, segmentasi warna, ekstraksi fitur, dan klasifikasi. Preprocessing digunakan untuk mendapatkan Region of Interest (ROI) dengan memotong citra dan mengubah ukuran citra. Segmentasi warna menggunakan metode HSV untuk mendapatkan kedalaman warna citra dan ekstraksi fitur mengguakan Gray Level Co-occurrence Matrix (GLCM) untuk mendapatkan fitur dari kontras, korelasi, energi, dan homogenitas. Hasil klasifikasi dengan algoritma LVQ mendapatkan akurasi tertinggi 76,25%. Algoritma telah diuji dengan MSE untuk mengetahui minimum error dan PSNR digunakan sebagai pengukuran kualitas citra pengolahan.

scholarly journals Klasifikasi Pneumonia Pada Citra X-Rays Paru-Paru Menggunakan GLCM Dan LVQ

2021 ◽  
Vol 1 (2) ◽  
pp. 184-194
Author(s):  
Jimmi Lin ◽  
Hafiz Irsyad
Keyword(s):  
Vector Quantization ◽  
Learning Vector Quantization ◽  
Learning Rate ◽  
Gray Level ◽  
X Rays ◽  
Occurrence Matrix

Pneumonia merupakan salah satu penyakit infeksi saluran pernafasan yang ditanda dengan peradangan pada satu atau kedua paru-paru yang dapat disebabkan oleh jamur, virus, dan bakteri yang menyebabkan kantung udara sulit menyerap oksigen. Salah satu cara yang dapat digunakan untuk mendeteksi adanya penyakit pneumonia adalah dengan foto rontgen, hasil foto rontgen akan dianalisis oleh orang yang ahli dalam bidang tersebut untuk memastikan apakah adanya pneumonia atau tidak. Penelitian ini dilakukan dengan tujuan untuk mengklasifikasikan hasil x-rays kedalam sebuah program untuk mengetahui apakah terdapat pneumonia atau tidak. Metode yang digunakan untuk ekstraksi fitur adalah Gray Level Co-Occurrence Matrix (GLCM) dengan arah 0°, 45°, 90°, 135° dan metode klasifikasi Learning Vector Quantization (LVQ). Proses sebelum dilakukan klasifikasi yaitu melakukan resize terlebih dahulu, selanjutnya dilakukan ekstraksi fitur menggunakan Gray Level Co-Occurrence Matrix (GLCM) dan di klasifikasi menggunakan Learning Vector Quantization (LVQ) dengan akurasi data train terbaik sebesar 89,714% dan akurasi data test yang terbaik sebesar 74,000% yang didapat pada pengujian dengan learning rate = 0,4.

scholarly journals Perbandingan Metode Klasifikasi pada Pengolahan Citra Mata Ikan Tuna

2020 ◽  
Vol 5 ◽  
Author(s):  
Toni Dwi Novianto ◽  
I Made Susi Erawan
Keyword(s):  
Image Processing ◽  
Feature Extraction ◽  
Region Of Interest ◽  
Nearest Neighbors ◽  
Support Vector ◽  
Gray Level ◽  
K Nearest Neighbors ◽  
Eye Color ◽  
Occurrence Matrix ◽  
Fish Eye

<p class="AbstractEnglish"><strong>Abstract:</strong> Fish eye color is an important attribute of fish quality. The change in eye color during the storage process correlates with freshness and has a direct effect on consumer perception. The process of changing the color of the fish eye can be analyzed using image processing. The purpose of this study was to obtain the best classification method for predicting fish freshness based on image processing in fish eyes. Three tuna fish were used in this study. The test was carried out for 20 hours with an eye image every 2 hours at room temperature. Fish eye image processing uses Matlab R.2017a software while the classification uses Weka 3.8 software. The image processing stages are taking fish eye image, segmenting ROI (region of interest), converting RGB image to grayscale, and feature extraction. Feature extraction used is the gray-level co-occurrence matrix (GLCM). The classification techniques used are artificial neural networks (ANN), k-neighborhood neighbors (k-NN), and support vector machines (SVM). The results showed the value using ANN = 0.53, k-NN = 0.83, and SVM = 0.69. Based on these results it can be determined that the best classification technique is to use the k-nearest neighbor (k-NN).</p><p class="AbstrakIndonesia"><strong>Abstrak:</strong> Warna mata ikan merupakan atribut penting pada kualitas ikan. Perubahan warna mata ikan selama proses penyimpanan berhubungan dengan tingkat kesegaran dan memiliki efek langsung pada persepsi konsumen. Proses perubahan warna mata ikan dapat dianalisis menggunakan pengolahan citra. Tujuan penelitian ini adalah mendapatkan metode klasifikasi terbaik untuk memprediksi kesegaran ikan berbasis pengolahan citra pada mata ikan. Tiga ekor ikan tuna digunakan dalam penelitian ini. Pengujian dilakukan selama 20 jam dengan pengambilan citra mata setiap 2 jam pada suhu ruang. Pengolahan citra mata ikan menggunakan software matlab R.2017a sedangkan pengklasifiannya menggunakan software Weka 3.8. Tahapan pengolahan citra meliputi pengambilan citra mata ikan, segmentasi ROI (<em>region of interest</em>), konversi citra RGB menjadi <em>grayscale</em>, dan ekstraksi fitur. Ekstraksi fitur yang digunakan yaitu <em>gray-level co-occurrence matrix</em> (GLCM).  Teknik klasifikasi yang digunakan yaitu, <em>artificial neural network</em> (ANN), <em>k-nearest neighbors</em> (k-NN), dan <em>support vector machine</em> (SVM). Hasil penelitian menunjukkan nilai korelasi menggunakan ANN = 0,53, k-NN = 0,83, dan SVM = 0,69. Berdasarkan hasil tersebut dapat disimpulkan teknik klasifikasi terbaik adalah menggunakan <em>k-nearest neighbors</em> (k-NN).</p>

scholarly journals Prediction of Clinically Significant Cancer Using Radiomics Features of Pre-Biopsy of Multiparametric MRI in Men Suspected of Prostate Cancer

Cancers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 6199
Author(s):  
Chidozie N. Ogbonnaya ◽  
Xinyu Zhang ◽  
Basim S. O. Alsaedi ◽  
Norman Pratt ◽  
Yilong Zhang ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Quantitative Imaging ◽  
Spatial Relationship ◽  
Region Of Interest ◽  
Texture Features ◽  
Gray Level ◽  
Discriminative Ability ◽  
Significant Difference ◽  
Clinically Significant ◽  
Occurrence Matrix

Background: Texture features based on the spatial relationship of pixels, known as the gray-level co-occurrence matrix (GLCM), may play an important role in providing the accurate classification of suspected prostate cancer. The purpose of this study was to use quantitative imaging parameters of pre-biopsy multiparametric magnetic resonance imaging (mpMRI) for the prediction of clinically significant prostate cancer. Methods: This was a prospective study, recruiting 200 men suspected of having prostate cancer. Participants were imaged using a protocol-based 3T MRI in the pre-biopsy setting. Radiomics parameters were extracted from the T2WI and ADC texture features of the gray-level co-occurrence matrix were delineated from the region of interest. Radical prostatectomy histopathology was used as a reference standard. A Kruskal–Wallis test was applied first to identify the significant radiomic features between the three groups of Gleason scores (i.e., G1, G2 and G3). Subsequently, the Holm–Bonferroni method was applied to correct and control the probability of false rejections. We compared the probability of correctly predicting significant prostate cancer between the explanatory GLCM radiomic features, PIRADS and PSAD, using the area under the receiver operation characteristic curves. Results: We identified the significant difference in radiomic features between the three groups of Gleason scores. In total, 12 features out of 22 radiomics features correlated with the Gleason groups. Our model demonstrated excellent discriminative ability (C-statistic = 0.901, 95%CI 0.859–0.943). When comparing the probability of correctly predicting significant prostate cancer between explanatory GLCM radiomic features (Sum Variance T2WI, Sum Entropy T2WI, Difference Variance T2WI, Entropy ADC and Difference Variance ADC), PSAD and PIRADS via area under the ROC curve, radiomic features were 35.0% and 34.4% more successful than PIRADS and PSAD, respectively, in correctly predicting significant prostate cancer in our patients (p < 0.001). The Sum Entropy T2WI score had the greatest impact followed by the Sum Variance T2WI. Conclusion: Quantitative GLCM texture analyses of pre-biopsy MRI has the potential to be used as a non-invasive imaging technique to predict clinically significant cancer in men suspected of having prostate cancer.

Mammogram Classification Using Nonsubsampled Contourlet Transform and Gray-Level Co-Occurrence Matrix

2020 ◽  
pp. 239-255
Author(s):  
Khaddouj Taifi ◽  
Naima Taifi ◽  
Mohamed Fakir ◽  
Said Safi ◽  
Muhammad Sarfraz
Keyword(s):  
Region Of Interest ◽  
Contourlet Transform ◽  
Support Vector ◽  
Gray Level ◽  
Nonsubsampled Contourlet Transform ◽  
Mass Detection ◽  
K Nearest Neighbors ◽  
Cad System ◽  
Occurrence Matrix ◽  
Breast Tissues

This chapter explores diagnosis of the breast tissues as normal, benign, or malignant in digital mammography, using computer-aided diagnosis (CAD). System for the early diagnosis of breast cancer can be used to assist radiologists in mammographic mass detection and classification. This chapter presents an evaluation about performance of extracted features, using gray-level co-occurrence matrix applied to all detailed coefficients. The nonsubsampled contourlet transform (NSCT) of the region of interest (ROI) of a mammogram were used to be decomposed in several levels. Detecting masses is more difficult than detecting microcalcifications due to the similarity between masses and background tissue such as F) fatty, G) fatty-glandular, and D) dense-glandular. To evaluate the system of classification in which k-nearest neighbors (KNN) and support vector machine (SVM) used the accuracy for classifying the mammograms of MIAS database between normal and abnormal. The accuracy measures through the classifier were 94.12% and 88.89% sequentially by SVM and KNN with NSCT.

scholarly journals PERBAIKAN KONTRAS CITRA MAMMOGRAM PADA KLASIFIKASI KANKER PAYUDARA BERDASARKAN FITUR GRAY-LEVEL CO-OCCURRENCE MATRIX

2020 ◽  
Vol 3 (1) ◽  
pp. 46-51
Author(s):  
Febri Liantoni ◽  
Agus Santoso
Keyword(s):  
Breast Cancer ◽  
Feature Extraction ◽  
Median Filter ◽  
Region Of Interest ◽  
Histogram Equalization ◽  
Support Vector ◽  
Gray Level ◽  
Image Construction ◽  
Occurrence Matrix ◽  
Mammogram Images

In this era to recognize breast tumors can be based on mammogram images. This method will expedite the process of recognition and classification of breast cancer. This research was conducted classification techniques of breast cancer using mammogram images. The proposed model targets classification studies for cases of malignant, and benign cancer. The research consisted of five main stages, preprocessing, histogram equalization, convolution, feature extraction, and classification. For preprocessing cropping the image using region of interest (ROI), for convolution, median filter and histogram equalization are used to improve image quality. Feature extraction using Gray-Level Co-Occurrence Matrix (GLCM) with 5 features, entropy, correlation, contrast, homogeneity, and variance. The final step is the classification using Radial Basis Function Neural Network (RBFNN) and Support Vector Machine (SVM). Based on the hypotheses that have been tested and discussed, the accuracy for RBFNN is 86.27%, while the accuracy for SVM is 84.31%. This shows that the RBFNN method is better than SVM in distinguishing types of breast cancer. These results prove the process of improving image construction using histogram equalization and the median filter is useful in the classification process.

Detection of image region-duplication forgery based on gray level co-occurrence matrix

2012 ◽  
Vol 31 (6) ◽  
pp. 1628-1630
Author(s):  
Jia-jia OU ◽  
Bi-ye CAI ◽  
Bing XIONG ◽  
Feng LI
Keyword(s):  
Gray Level ◽  
Image Region ◽  
Region Duplication ◽  
Occurrence Matrix

Gray-Level Co-occurrence Matrix and Random Forest Based Off-line Odia Handwritten Character Recognition

2019 ◽  
Vol 13 (2) ◽  
pp. 136-141 ◽  
Author(s):  
Abhisek Sethy ◽  
Prashanta Kumar Patra ◽  
Deepak Ranjan Nayak
Keyword(s):  
Feature Extraction ◽  
Random Forest ◽  
Character Recognition ◽  
Recognition Rate ◽  
Discrete Wavelet ◽  
Gray Level ◽  
Handwritten Character Recognition ◽  
Handwritten Character ◽  
Wide Range ◽  
Occurrence Matrix

Background: In the past decades, handwritten character recognition has received considerable attention from researchers across the globe because of its wide range of applications in daily life. From the literature, it has been observed that there is limited study on various handwritten Indian scripts and Odia is one of them. We revised some of the patents relating to handwritten character recognition. Methods: This paper deals with the development of an automatic recognition system for offline handwritten Odia character recognition. In this case, prior to feature extraction from images, preprocessing has been done on the character images. For feature extraction, first the gray level co-occurrence matrix (GLCM) is computed from all the sub-bands of two-dimensional discrete wavelet transform (2D DWT) and thereafter, feature descriptors such as energy, entropy, correlation, homogeneity, and contrast are calculated from GLCMs which are termed as the primary feature vector. In order to further reduce the feature space and generate more relevant features, principal component analysis (PCA) has been employed. Because of the several salient features of random forest (RF) and K- nearest neighbor (K-NN), they have become a significant choice in pattern classification tasks and therefore, both RF and K-NN are separately applied in this study for segregation of character images. Results: All the experiments were performed on a system having specification as windows 8, 64-bit operating system, and Intel (R) i7 – 4770 CPU @ 3.40 GHz. Simulations were conducted through Matlab2014a on a standard database named as NIT Rourkela Odia Database. Conclusion: The proposed system has been validated on a standard database. The simulation results based on 10-fold cross-validation scenario demonstrate that the proposed system earns better accuracy than the existing methods while requiring least number of features. The recognition rate using RF and K-NN classifier is found to be 94.6% and 96.4% respectively.

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