Görüntü piksel değerlerini siyah-beyaz renge dönüştürülmesi eşikleme (thresholding), görüntü işleme yöntemiyle gerçekleştirilmektedir. Renkli bir griye dönüştürüldükten sonra görüntüye dönüştürülmektedir. Eşikleme sonunda görüntüler, en sade haline ulaşmaktadır. Eşik olarak kullanılacak değerin, doğru belirlenmesi gerekmektedir. Eğer eşik değeri, çok yüksek veya düşük olursa üzerinde kayıplar m...

Local high-order autocorrelation features proposed by Otsu have been successfully applied to face recognition and many other pattern recognition problems. These features are invariant under translation, but not invariant under scale and rotation. We construct scale and rotation invariant features from the local high-order autocorrelation features. x 1 Introduction In pattern recognition problem...

Diabetic Retinopathy (DR) harm retinal blood vessels in the eye causing visual deficiency. The appearance and structure of blood vessels in retinal images play an essential part in the diagnoses of an eye sicknesses. We proposed a less computational unsupervised automated technique with promising results for detection of retinal vasculature by using morphological hessian based approach and regi...

On 22 December 2018, volcano Anak Krakatau, located in Indonesia, erupted and experienced a major lateral collapse. The triggered tsunami killed at least 437 people by the 13-m-high tide. Traditional optical imagery plays great role monitoring volcanic activities, but it is susceptible to cloud fog interference has low temporal resolution. Synthetic aperture radar (SAR) can monitor activities h...

We present a comprehensive critical review of well-established satellite remote sensing water indices and offer novel, robust Augmented Normalized Difference Water Index (ANDWI). ANDWI employs an expanded set spectral bands, RGB, NIR, SWIR1-2, to maximize the contrast between non-water pixels. Further, we implement dynamic thresholding method, Otsu algorithm, enhance ANDWI's performance. Applie...

1Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan, 2Department of Obstetrics and Gynecology, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan, 3Department of Emergency and Intensive Care, Shiga University of Medical Science, Otsu, Japan, 4Central Research Institute of Maruha Corp., Ibaraki, Japan, 5Department of Molecular Behaviora...

Mammographic mass detection is an important task for early detection of breast cancer diagnosis and treatment. This is however still remains a challenging task. In this paper, we have proposed a multilevel thresholding algorithm for segmenting the tumor. This paper compares two most popular method, namely between class variance (Otsu) and entropy criterion (Kapur’s) methods for segmenting the t...

Dry fingerprint has blurred image, because of overlapping of valleys, singular point to the fingertip and ridges. By using local entropy thresholding method, we extract the fingerprint images. This method is compared to canny filter images, sobel filter images and otsu algorithm images. This technique is used to enhance the contrast between valleys and ridges of the poor, medium and best image ...

The profilogram of FAE (fuel-air explosive) fuel explosion image is the important base to analyze the explosion process. In this article, the double peak method, the iteration method, the OTSU method, and the maximum entropy criterion method are respectively used to confirm the threshold, and extract and compare the profilograms of the FAE fuel explosion image, which could establish the base fo...