In this paper a wavelet-based logo watermarking scheme is presented. The logo watermark is embedded into all sub-blocks of the LLn sub-band of the transformed host image, using quantization technique. Extracted logos from all sub-blocks are merged to make the extracted watermark from distorted watermarked image. Knowing the quantization step-size, dimensions of logo and the level of wavelet tra...

introduction: the use of panoramic radiography has shown a remarkable expansion over the past 20 years. accurate positioning and preparation of patients is needed to avoid image distortion. the aim of this study was to evaluate the common errors on panoramic radiographs taken in the radiology department of rasht dental school. materials and methods: the study sample included 390 digital panoram...

LEGEND TO IMAGE (A) Uterus with multiple leiomyomata. Patient presented with acute abdomen. Upon entering the abdomen the patient was found to have one to two liters of purulent fluid. (B) Necrotic leiomyomata that had para-sitized the transverse colon and eroded into the lumen of the bowel. The patient required a total abdominal hysterectomy with bilateral salpingo-oophorectomy, bowel resectio...

land cover mapping is important for many planning and management activities. today, satellite images and remote sensing techniques are extensively used in all sectors including agriculture and natural resources because they provide updated data and high analyzing abilities. in this study, in order to produce land cover map for the northern part of hamedan province , digital satellite data irsp6...

Introduction: This study, evaluate pediatric digital radiography. Due to the high rates of this test and the high sensitivity of children to ionizing radiation in comparison with adults, it is attempted to achieve near optimal conditions by reducing the dose and maintaining the image quality. The object of the study is to change the irradiation parameters such as kV and mA and ...

background and aims. digital imaging continues to gain acceptance in dentistry and video display used for this becomes important. the aim of this study was to assess the influence of the display monitor on observer performance on caries detection. materials and methods. artificial enamel lesions were created in 40 extracted teeth at random using 1/4 and 1/2 round burs. teeth were mounted in den...

The preparation of vegetation cover maps by used the land inventory and a traditional method has a lot of cost and time. But today, remote sensing is one of the main sources of data collection and information production for study and monitoring land resources, and was efficient tools for providing quickly and timely data and information needs for program planning in the natural resource filed. ...