This paper presents the improvement of watermarking images by the joint use of the technique of spread spectrum (robustness) and a psycho visual mask pattern (imperceptibility) in the JPEG 2000 compression. Previous work had shown the benefit of using the technique of spread spectrum in the safety of the JPEG 2000 compression. After the wavelet decomposition of the image, the brand is inserted ...

Introduction: The reconstruction of images from highly undersampled data, especially for the reconstruction of high frame rate MR Angiography images, has recently become a topic of great interest. Many methods which exploit both the sparse nature of angiographic images as well as the relatively mild undersampling artifacts of the radial trajectory have been introduced, including compressed sens...

results the mean heart rate values were significantly less in the sevoflurane group (p value < 0.05) at 25 minutes after the surgery. the mean blood pressure in the isoflurane group was significantly higher compared with the sevoflurane group in 10, 20 and 30 minutes after the surgery (p values = 0.0131, 0.0373 and 0.0028, respectively). these differences were clinically unimportant because hea...

An automated binary change detection model using a threshold-based calibration approach was introduced in the study. The burdensome processes required in binary change detection, including calibration, calculation of accuracy, extraction of optimum threshold(s), generation of a binary change mask, and removal of “salt-and-pepper” noise were integrated and automated in the model. For practical p...

quiet, single room for the 24-h test period; studies were done at 1:00 PM and 1:00 AM, both in supine position with a closefitting face mask and nasal packing to ensure mouth breathing. Subjects inhaled nebulized saline solution (control) and citric acid, delivered by an ultrasonic nebulizer. The citric acid was dissolved in the saline solution, providing incremental concentra¬ tions from 0.3 t...

In this paper, two new algorithms have been proposed for performing video object segmentation. In both algorithms, a new method has been proposed for adaptive threshold estimation for the change detection process. The method is able to provide a reliable estimation of the threshold without knowing explicitly which data corresponds to the moving and non-moving elements in the video sequence. In ...