Shape representation is one of the key issues in a computer vision system. One important group of shape representations is multiple scale representation. In past years, many studies have been taken focusing on such group. Most of them used some operations such as smoothing, bluring or grouping to gradually obtain representation with diierent degrees of detail. Based on these operations, they us...

Recently medical cosmetic has attracted significant business opportunity. Micro cosmetic surgery usually involves invasive cosmetic procedures such as non-ablative laser procedure for skin rejuvenation. However, to select an appropriate treatment for skin relies on accurate preoperative evaluations. In this paper, an automatic facial skin defects detection and recognition method is proposed. Th...

We consider the problem of the automatic inspection of industrial metal pieces. The purpose of the work presented in this paper is to derive a method for defect detection. For the first time in this context we adapt level set method to distinguish hollow regions in the metal pieces from the grinded surface. We compare this method with Canny edge enhancement and with a thresholding method based ...

This research developed an AOI (automated optical inspection) system for the O-Ring inspection. First, was implemented to detect surface scratches, flow marks, non-fills, and indentations on elastomer O-Rings with high reflection coefficients. The proposed employed multiple light source structures realize photometric stereo. method eased identification of contour Bézier control points. Then, by...

In order to solve the problem of defect detection and contour accurate segmentation periodic texture fabric images, a method based on saliency region similarity location is proposed. Firstly, image be detected was processed by color space conversion, Gaussian filtering, contrast enhancement, frequency-tuned (FT) salient algorithm used estimate map enhanced image. The divided into blocks same si...

Arthroscopic over-resection of the head-neck junction during the treatment of a cam deformity can be a devastating complication and is difficult to treat. Large defects of the femoral head-neck junction (FHNJ) increase the risk of femoral neck fracture and can also affect hip biomechanics. We describe a case of an iatrogenic defect of the FHNJ due to excessive bone resection, and a previously n...

AIM The purpose of this study was to evaluate contrast-enhanced ultrasonography (CEUS) as a modality for diagnosing perforation of the gallbladder (GB) and pericholecystic hepatic abscess. METHODS This retrospective study comprised 6 patients with acute cholecystitis and GB perforation plus pericholecystic hepatic abscess who underwent conventional US and CEUS imaging. The following sonograph...

BACKGROUND Recombinant human bone morphogenic protein-2 stimulates bone augmentation in animal models. The aim of this study was to evaluate the capacity of bovine bone mineral coated with synthetic oligopeptides to enhance guided bone regeneration in the beagle 3-wall defect model and the clinical implications. METHODS The second and fourth mandibular premolars of four adult beagle dogs were...