نتایج جستجو برای: pixel value differencing
تعداد نتایج: 775448 فیلتر نتایج به سال:
The hiding capacity (HC), imperceptibility, and security are the 3 important quality measures for a steganography technique. While stego-image is on transit internet, hidden data may be changed because of various reasons. existing techniques does neither focus detecting errors in nor to correct data. Therefore, this article brings forward technique, wherein error detection correction can perfor...
Typically, digital image processing for burned-areas detection combines the use of a spectral index and the seasonal differencing method. However, the seasonal differencing has many errors when applied to a long-term time series. This article aims to develop and test two methods as an alternative to the traditional seasonal difference. The study area is the Chapada dos Veadeiros National Park (...
Inventories of past and present land cover changes form the basis for future conservation strategies and landscape management. In this study Landsat images of a mountainous area in Mexico are used in an objectbased and pixel-based image classification. The land cover categories with the highest individual classification accuracies determined with these two methods are extracted and merged into ...
The assessment of storm damages is critically important if resource managers are to understand the impacts of weather pattern changes and sea level rise on their lands and develop management strategies to mitigate its effects. This study was performed to detect land cover change on Assateague Island as a result of Hurricane Sandy. Several single-date classifications were performed on the pre an...
The paper presents a method of image segmentation applying the half-byte data format. The half-byte data format is an image representation that consists of two types of image pixel values, pixel base values and calculated pixel difference values. Original image pixel value is obtained by joining pixel difference value and corresponding base pixel value. The layout of base pixels value is in acc...
Many works have demonstrated that the performance of the prediction error (PE) based reversible watermarking algorithm depends on the precision of the prediction value. However, most algorithms compute the prediction value by exploiting only the correlation between the embedding pixel and its neighboring pixels, thus limiting the watermarking performance of these algorithms. In this work, we ob...
Vertical differencing is a very different problem from horizontal differencing. This may seem odd, but the explanation is very simple. There are three primary factors. First, gravitational effects are very powerful, and act only in the vertical. Second, the Earth's atmosphere is very shallow compared to its horizontal extent. Third, the atmosphere has a lower boundary. To construct a vertically...
Land use/cover change mapping is one of the basic tasks for environmental monitoring and management. In recent years, a variety of change detection techniques have been developed. This research compares three change detection techniques, including image differencing, image rationing, and image regression to study land use/cover changes in Falavarjan /Iran. The data sources used in this study we...
Change detection (CD) is the process of detecting changes from multi-temporal satellite images that have undergone spatial due to natural phenomena and/or human-induced activities. Mango a major fruit crop in India, but mango crops remains challenging task because reason many perennial similar reflectance profiles. Therefore, potent change technique required for different applications such as r...
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