Objective image quality assessment (IQA) measures are playing an increasingly important role in the evaluation of digital quality. New IQA indices expected to be strongly correlated with subjective observer evaluations expressed by Mean Opinion Score (MOS) or Difference (DMOS). One such recently proposed index is SuperPixel-based SIMilarity (SPSIM) index, which uses superpixel patches instead a...

For lack of directivity in Total Variation (TV) which only uses x-coordinate and y-coordinate gradient transform as its sparse representation approach during the iteration process, this paper brought in Adaptive-weighted Diagonal Total Variation (AwDTV) that uses the diagonal direction gradient to constraint reconstructed image and adds associated weights which are expressed as an exponential f...

We describe an end-to-end trainable model for image compression based on variational autoencoders. The model incorporates a hyperprior to effectively capture spatial dependencies in the latent representation. This hyperprior relates to side information, a concept universal to virtually all modern image codecs, but largely unexplored in image compression using artificial neural networks (ANNs). ...

Diagnostic X-ray imaging depends on the maintenance of image quality that allows for proper diagnosis of medical conditions. Maintenance of image quality requires quality assurance programs on the various X-ray modalities, which consist of pro-jection radiography (including mobile X-ray units), fluoroscopy, mammography, and computed tomography (CT) scanning. Currently a variety of modality-spec...

A localization algorithm in optical localization nanoscopy plays an important role in obtaining a highquality image. By challenging 2D synthetic nanoscopy data, performances of 32 localization software packages were recently evaluated. The challenge has been advanced to focus on 3D imaging and become an open public online challenge that up to now has drawn 84 participant packages. A universal a...

Aerial photogrammetry is one of the main methods obtaining geospatial information. After entering the 21st century, aerial photogrammetry technology has fully entered the digital age, and the quality of digital aerial photography results will directly affect the quality and accuracy of results of surveying and mapping .Therefore, it is necessary to inspect the quality of digital aerial photogra...

Assessment of image quality based on structural information is a relevant topic in the image processing field. A new method to assess image quality is presented. It is based on the comparison of first and second order moments of the local variance distribution of two images. This new quality index is better suited to assess the non-stationarity of images, therefore it explicitly focuses on the ...