Szabolcs Sergyán

Learn More
— In content-based image retrieval systems (CBIR) the most efficient and simple searches are the color based searches. Altough this methods can be improved if some prepocessing steps are used. In this paper one of the prepocessing algorithms, the image classification is analized. In CBIR image classification has to be computationally fast and efficient. In(More)
In content-based image retrieval systems the most efficient and simple searches are the color-based searches, which can be realized in several color spaces and by several color descriptors. In this paper the possibility of image classification using certain color descriptors is examined, and the usage of different color spaces and descriptors depending on(More)
— Selecting the right parameter is a vital issue in many image processing algorithms. Normally this is done after experimenting with a limited number of pictures, and then one just hopes that the parameters will work adequately with all the other images. Experimenting with the parameters, however, consumes precious human time. Edge detection of thermal(More)
— Selecting the right parameters is a vital issue in image processing algorithms. Normally this is done after experimenting with a limited number of pictures, and then one just hopes that the parameters will work adequately with all the other images. Experimenting with the parameters, however, consumes precious human time. In this paper we present a(More)
Checking the consistency of image databases is not a completely solved problem. To decide if an image has already been inserted into the database can only be checked by actually looking through the images, or using the textual descriptive keywords attached to the database items. Both the visual checking and the keyword search in a large image database may(More)
—The main aim of this work is to show, how GPGPUs can facilitate certain type of image processing methods. The software used in this paper is used to detect special tissue part, the nuclei on (HE – hematoxilin eosin) stained colon tissue sample images. Since pathologists are working with large number of high resolution images – thus require significant(More)
Searching for similar images in an image database color is the most often considered feature. The color-based comparison and retrieval has a variety of widely used techniques. In this article a new color feature is proposed to use, that takes into account the dominant colors in HSV color space, the color histogram and the spatial distribution of pixels.(More)
—Lossless data compression is an important topic from both data transmission and storage point of view. A well chosen data compression technique can largely reduce the required throughput or storage need. As a tradeoff, data compression always requires some computing resources which are in a correlation with the achieved compression rate. For a particular(More)
—The goal of this paper is to detect visible microa-neurysms in retina using size and shape. To achieve the desired goal multi-stage image processing techniques are used. The vascular network and the red regions are highlighted using morphological methods, so these can be segmented with region growing algorithms. Mask is generated that contains only the(More)