The level of quality in segmentation and classification tasks, operating on biomedical digital images, is strongly affected by the ability of the feature functions to map the input structures on “highly separated” data sets. This level of separation is strictly dependent by the “discriminatory power” of the chosen feature functions, meaning with this expression the property of the functions to ...

To solve the problems of underwater image color deviation, low contrast, and blurred details, an algorithm based on correction detail enhancement is proposed. First, improved nonlocal means denoising used to denoise image. The combination Gaussian weighted spatial distance Euclidean as index measure similarity structural blocks. can retain more edge features texture information while maintainin...

Image enhancement is a process of improving the quality of image by improving its feature. Contrast enhancement is one of the challenging and interesting area of image processing. Image enhancement plays a vital role in medical images, aerial image, microscopic images, even real life photographs, all these suffers from poor contrast and noise. Uncertainty present in the images can be handled an...

The purpose of this study was to examine the correlation between the basic imaging properties of two digital radiographic X-ray systems with a direct conversion flat-panel detector and their image qualities, which were evaluated by the observer in hard copy and soft copy studies. The subjective image quality was evaluated and compared in terms of the low-contrast detectability and image sharpne...

For more than a century, now radiographs have been taken using radiographic film. Digital imaging has been replacing traditional films in private practice, academic institutions in the last two decades. As use of digital radiography has become more common in the last decade with rapidly evolving changes in the way healthcare is administered, coupled with the amazing recent advances in imaging, ...

Enhancement is one of the challenging factors in image processing. The objective of enhancement is to improve the structural appearance of an image without any degradation in the input image. The enhancement techniques make the identification of key features easier by removing noise and other artifacts in an image. This paper analyzes the performance of various enhancement techniques based on n...