This paper concentrates on developing an effective approach for decompressing JPEG document images. Our main goal is targeted to time-critical applications, especially to those situated on mobile network infrastructures. To this aim, the proposed approach is designed to work either in the transform domain or image spatial plane. Specifically, the image blocks are first classified into smooth blocks (e.g., background and uniform regions) and non-smooth blocks (e.g., text, graphics, and line-drawings). Next, the smooth blocks are fully decoded in the transform domain by minimizing the total block boundary variation, which is very efficient to compute. For decoding non-smooth blocks, a novel text model is presented that accounts for the specifics of document content. In addition, an efficient optimization algorithm is introduced to reconstruct the non-smooth blocks. The proposed approach has been validated by extensive experiments, demonstrating a significant improvement of visual quality, assuming that document images have been encoded at low bit rates and thus are subject to severe distortion.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1109/TIP.2016.2576024 | DOI Listing |
BMJ Case Rep
March 2025
Neurosurgery, ASST Grande Ospedale Metropolitano Niguarda, Milano, Italy.
Tarlov cysts or perineural cysts are extradural cerebrospinal fluid (CSF)-filled sacs commonly found in the sacral spine. Their clinical significance is often underestimated due to diagnostic challenges. This case report describes a female patient presenting with rectal pain, coccydynia, dyspareunia and urinary symptoms.
View Article and Find Full Text PDFBMJ Case Rep
March 2025
Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
Int J Surg Case Rep
March 2025
Faculty of Medicine, Pontifical Xavierian University, Bogotá, Colombia.
Introduction: Retroperitoneal liposarcomas are rare malignant tumors that often present asymptomatically until advanced stages. Giant liposarcomas exceeding 30 cm are particularly uncommon, and colonic infiltration causing gastrointestinal bleeding is extremely rare, with only a few cases documented in the literature.
Case Presentation: A 78-year-old female presented with hematochezia, constipation, and diffuse abdominal pain.
Cogn Process
March 2025
School of Arts and Social Sciences, Hong Kong Metropolitan University, 30 Good Shepherd Street, Ho Man Tin, Hong Kong SAR, China.
Cognitive functions such as attention and memory significantly impact performance in daily life and in various professions, including driving vehicles and providing healthcare services. Driven by the importance of understanding attention, early studies have explored the attentional theories and discovered the attentional boost effect (ABE). In experiments studying the ABE, participants are required to engage in two concurrent tasks: (1) memorising a sequence of briefly displayed stimuli (e.
View Article and Find Full Text PDFNeurosurg Rev
March 2025
Department of Anaesthesia and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
Spontaneous intracranial hypotension (SIH) is a rare clinical condition that may occur due to cerebrospinal fluid leakage. The purpose of this study was to compare the safety and efficacy of single catheter multisite epidural blood patch(CA-EBP) with standard procedures, including blinded and targeted epidural blood patch (EBP) for the treatment of SIH, and to investigate the effectiveness of dexamethasone as an adjuvant. Clinical data of 68 patients with postoperative SIH who underwent EBP between March 2022 and May 2024.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!