Texture Recovery Research Articles

Clinical application of the thoracodorsal artery perforator flap for repair of hand skin defects

Objective To explore the clinical application of the thoracodorsal artery perforator flap in repair of hand skin defects. Methods From April 2013 to December 2016, 5 patients with hand skin defects being 3.5 cm×5.2 cm to 6.8 cm×9.5 cm were treated using free transplantation of the thoracodorsal artery perforator flap. The blood circulation was reconstructed by the trunk of thoracodorsal artery anastomosis with the branch of hand artery, and flap accompanied vein or subcutaneous vein anastomosis with dorsal hand vein. The wound of donor site at chest and back was closed by direct suture. Results All 5 cases of the thoracodorsal artery perforator flap survived after operation. Partial skin margin necrosis occurred in 1 case, which obtained direct suture after secondary surgical debridement. Flap debulking was performed in 2 cases 3 months after the operation. The postoperative follow-up ranged from 3 to 15 months with an average of 6 months. The flaps had good texture, satisfactory appearance and good hand functional recovery. The donor site of the thoracodorsal artery perforator flap was hidden only with linear scar. Conclusion The thoracodorsal artery perforator flap is an ideal method for the repair of hand skin defects. Key words: Surgical flaps; Hand injuries; Skin defects; Thoracodorsal artery

Procedural Restoration of Texture and Restructuring Geometry From Facade Image

We present a novel methodology to procedurally restore facade texture from images, where severe occlusions and lighting variations occur, making the textures difficult to reconstruct effectively. A refinement strategy is designed, which includes an iterative weighted-average algorithm, to restore and update the high-quality consensus texture of the targeted building. Our approach combines component-based structure analysis and rule-based texture recovery techniques that are suitable for removing the occluded areas from a given building facade. We demonstrate our framework on several real-world buildings with varying amounts of occlusion, and show that our approach can be used to generate 3-D buildings with far more aesthetic quality than the previous approaches.

Clinical application of penta-flaps plastic operation for treatment of web contracture with volar finger contracture

Objective To investigate the clinical efficacy of penta-flaps plastic operation in the treatment of web contracture with volar finger contracture. Methods From May 2012 to February 2015, 12 patients with web contracture and volar finger contracture were treated by penta-flaps plastic operation 0.5 to 3 years after injury. Penta-flaps were designed according to the contracted web. Simultaneously, the palm scar was released laterally at the level of metacarpophalangeal crease, and then the flaps staggered to cover the wound with one-stage correction. All the patients wore splint after surgery. Results All the flaps survived uneventfully except one flap occurred slight blood supply obstruction due to severe adhesion of finger web and healed by itself. All the patients were follow-up for 12 to 18 months postoperatively. The flaps were of suitable thickness, soft texture, good color and sensation recovery without contracture recurrence. Conclusion Application of penta-flaps plastic operation for treatment of web contracture with volar finger contracture can achieve satisfactory clinical efficacy, which is worthy of clinical promotion. Key words: Surgical flaps; Treatment outcome; Penta-flaps plastic operation; Web contracture

Image Inpainting Algorithm Based on Low-Rank Approximation and Texture Direction

Existing image inpainting algorithm based on low-rank matrix approximation cannot be suitable for complex, large-scale, damaged texture image. An inpainting algorithm based on low-rank approximation and texture direction is proposed in the paper. At first, we decompose the image using low-rank approximation method. Then the area to be repaired is interpolated by level set algorithm, and we can reconstruct a new image by the boundary values of level set. In order to obtain a better restoration effect, we make iteration for low-rank decomposition and level set interpolation. Taking into account the impact of texture direction, we segment the texture and make low-rank decomposition at texture direction. Experimental results show that the new algorithm is suitable for texture recovery and maintaining the overall consistency of the structure, which can be used to repair large-scale damaged image.

Free-Viewpoint Video of Human Actors Using Multiple Handheld Kinects

We present an algorithm for creating free-viewpoint video of interacting humans using three handheld Kinect cameras. Our method reconstructs deforming surface geometry and temporal varying texture of humans through estimation of human poses and camera poses for every time step of the RGBZ video. Skeletal configurations and camera poses are found by solving a joint energy minimization problem, which optimizes the alignment of RGBZ data from all cameras, as well as the alignment of human shape templates to the Kinect data. The energy function is based on a combination of geometric correspondence finding, implicit scene segmentation, and correspondence finding using image features. Finally, texture recovery is achieved through jointly optimization on spatio-temporal RGB data using matrix completion. As opposed to previous methods, our algorithm succeeds on free-viewpoint video of human actors under general uncontrolled indoor scenes with potentially dynamic background, and it succeeds even if the cameras are moving.

A PRELIMINARY STUDY ON LONGAN ARTIFICIAL CROSSING AND SEVERAL TRAITS OF THE HYBRID POPULATIONS

In this study, three longan cvs. 'Fengliduo', 'Dawuyuan' and 'Shixia' were used as crossing parents. In the springs of 2002 and 2004, artificial cross pollination was performed for 'Fengliduo' x 'Dawuyuan', 'Dawuyuan' ×'Fengliduo' and 'Dawuyuan'×'Shixia'. A Total of 455 hybrid seeds were obtained and 438 of them germinated and grew well. RAPD analysis was applied to 99 individuals (coded as FD01-FD99) of 'Fengliduo × Dawuyuan' and the result confirmed a 97% of true hybrid. From 2003 to 2008, the growth status, flower and fruit qualities were recorded among the populations. The record showed that the shortest juvenile phase of the hybrids was only 2.5 years, and the longest of them was only 3.5 years. For population of 'Fengliduo × Dawuyuan', the individuals with a juvenile period of 2.5 years accounts for 0.3% and those with 3.5 years juvenile phase for 1.2%. In the case of 'Dawuyuan × Fengliduo' population, only 0.03% of hybrid individuals had a juvenile phase of 2.5 years and about 25% with 3.5 years. For 'Dawuyuan x Shixia' population, no individuals with 2.5 years juvenile phase individual occurred, but those with a juvenile phase of 3.5 years took up as high as 81.8%. These results showed that the juvenile phase of longan is not very long. In addition, five outstanding individuals were selected according to the fruit quality from 143 fruiting hybrids in 2007. They were FD34, FD57, FD73, FD82 and FD97. Among them, FD97 was the best as it matures in mid-September with high-yield, even fruit shape, large fruit size (average weight is 12.7 g), yellowish and semi-transparent flesh, crisp and tender flesh texture, high SSC (23.2%) and flesh recovery (66.7%). The traits of fruit size, SSC and flesh recovery of FD97 were all better and matured 5-10 later than those of 'Caopuzhong', the famous high-quality and late season cultivar in Guangdong Province.

Effect of candying on microstructure and texture of plums ( Prunus domestica L.)

The plums ( Prunus domestica L.) of a specific ‘Green Gage’ variety, “Rainha Cláudia Verde”, are used to produce the candied product “Ameixa d’Elvas”. The candying process consists in boiling the intact plums in water and further immersion in sucrose syrup until 75 °Brix. Scanning electron microscopy of unprocessed plums revealed perfectly turgid parenchyma isodiametric cells with few intercellular spaces and the boiled plums showed a loss of intercellular adhesion of parenchyma cells and ruptures on the vascular strand structure. However, candied plums showed recovery of the turgidity and cell-to-cell adhesion of parenchyma cells. Texture analysis showed that the unprocessed plums had a fairly hard texture, improved by the presence of the skin. Firmness, rigidity, and deformation work had a sharp decrease upon boiling. However, after candying, an increase of firmness and deformation work was observed, also improved by the skin. Microstructure and texture recovery of the candying product suggests the formation of a jam-like structure in the middle lamella region promoted by the syrup. Nevertheless, cell adhesion recovery is limited by the extent of the disruption of the tissues during the boiling process. This is the first report concerning texture and microstructure changes of plums occurring during the candying process.

Geometry and Texture Recovery of Scenes of Large Scale

This paper presents a systematic approach to the problem of photorealistic 3-D model acquisition from the combination of range and image sensing. The input is a sequence of unregistered range scans of the scene and a sequence of unregistered 2-D photographs of the same scene. The output is a true texture-mapped geometric model of the scene. We believe that the developed modules are of vital importance for a flexible photorealistic 3-D model acquisition system. Segmentation algorithms simplify the dense datasets and provide stable features of interest which can be used for registration purposes. Solid modeling provides geometrically correct 3-D models. Finally, the automated range to an image registration algorithm can increase the flexibility of the system by decoupling the slow geometry recovery process from the image acquisition process; the camera does not have to be precalibrated and rigidly attached to the range sensor. The system is comprehensive in that it addresses all phases of the modeling problem with a particular emphasis on automating the entire process interaction.