Following the image processing steps on the Structured Light image, we have a binary image consisting of single pixel width pattern which shows where the projected lines are. The contours of subject surface mean that certain parts of the projected grid can not be seen on the captured image (dead shadow areas) and breaks occur in the projected grid itself around the sharp edges or holes. In order to produce a 3-D data set, all of the lines must be perfectly formed, of single-pixel thickness and be continuous. In this paper, the grid lines are interpreted and decisions must be made as to whether any given pixel belongs to which line. The main stage involved in this procedure is tracing. A novel approach of loop tracing introduced to overcome the problems encountered. As a pre-processing required before matching, the pixels detected during the feature extraction process are grouped into continuous lines using the tracing algorithms. These algorithms exploit the fact that the projected pattern was continuous, and allow us to recover the Structured Light image.

Three-dimensional (3-D) images have recently received wide attention in the medical and industrial applications. The research involves the development of a non-invasive contour capturing method for facial surfaces using the Structured Light technique. The research focuses on how the images are obtained using the Structured Light optic system and the subsequent image processing of data to give a realistic 3-D image. The image processing and feature extraction steps in the Structured Light system produce a binary image consisting of single pixel width pattern of the Structured Light, which show where the projected lines are. But the contours of the objects mean that certain parts of the projected grid can not be seen on the captured image (dead shadow areas) and breaks occur in the projected grid itself around the holes or sharp edges. In order to produce a 3-D data set, all of the projected lines must be perfectly formed, of single-pixel thickness and be continuous. The grid lines are interpreted and decisions must be made as to whether any given pixel belongs to which line. The algorithms attempt to provide solutions for both noise and breaks and to fill the disconnected areas.

Background: The need for a rapid, noninvasive method for unwanted hair removal has led to the development of various Light sources for this purpose. Objective: To evaluate the efficacy of Intense Pulsed Light Source (IPLS) on unwanted hairs. Patients & Methods: In this open, uncontrolled clinical trial, 77 different anatomical areas in 34 referred patients to "Novin Didegan Clinic" in Tehran in 1380-1381, were treated by IPLS at fluencies ranging from 22 to 34 j/cm2 after their demographic data and the number of hairs were recorded. The 3 to 7 treatment sessions were accomplished 4 to 6 weeks apart. All of the patients were followed 6 months after the last therapy. The quantitative data were  analyzed by paired t test. Results: Six months after the last therapy, more than 50% reduction in number of hairs was noted in 80% of the treated areas; with mean reduction of 72±23 percent. Side effects were mild and reversible and occurred in ten patients. Conclusion: The IPLS appears to provide an effective and safe method for long term excess hair removal in various skin types.      

Background & Aim: Impression making is considered as an important step in the fixed prosthodontics.the different impression material and techniques have been supposed to be important in the dimensional changes of dies. Furthermore, the results of different studies in this regard are contradictory. The present study compared the results of two impression making techniques of putty-wash including two-step with space and double -wash using Light and SUPER Light viscosity.Materials & Methods: In this experimentalinvitro study on the laboratory model, 10 impressions were made using two-step putty-wash technique with space and 10 impressions were made using double-wash techniqueby means of Light and SUPER Light viscosity. The impressions were poured using Velmix gypsum after 30 minutes. The height and diameter of the dies without undercut and the distance between two dies were measured 6 times while the variables were measured 3 times in the gypsum models by a blind operator using profile projector with an accuracy of micron. The mean values were calculated and the dimensions of the gypsum laboratory models were statistically analyzed by t- test.Results: The die height was decreased using both techniques of two-step with space and double-wash technique with Light and SUPER Light viscosity. The decrease was more pronounced in the double-wash technique by Light and SUPER Light viscosity. However, no significant differences were found between both techniques (P>0.05). Die diameter without undercut was significantly decreased in the double-wash technique by Light and SUPER Light viscosity (P<0.0001) while it was increased in the two-step technique with spaces. SLight distances were observed between two dies in the two-step impression technique with space. However, the distance between dies were increased using double-wash technique by Light and SUPER Light viscosity with significant differences (P<0.0001).Conclusion: The die diameter was decreased in the impression technique of double-wash using Light and SUPER Light viscosity while the distance between base teeth have been increased in this technique. Therefore, the technique is not accurate and needs more assessments.

Background and Aims: Retention and stability of the post and core system is the key factor for success of final restoration. The aim of this study was to evaluate the microtensile bond strength of the different composite core materials and bonding systems to a fiber post.Materials and Methods: To evaluate the bond strength of the composite resins to a fiber post (DT Light post) 60 posts were divided into six groups: group A: Heliomolar Flow+Seal Bond, group B: Heliomolar Flow+SE Bond, group C: Valux Plus+Seal Bond, group D: Valux Plus+SE Bond, group E: Corecem+Seal Bond, group F: Corecem+SE Bond. All samples were thermocycled for 5000 cycles (5-55oC) and cut into four bars for the microtensile bond strength test. Failure modes were identified using a stereomicroscope. Data were analysed using One-way ANOVA and Tukey HSD post hoc test (P<0.05).Results: The interaction between composite resin materials and bonding systems were positive. The conventional hybrid composite (Valux Plus) had significantly higher bond strength compared with the core specific flowable composite (Corecem) when Seal Bond was applied as bonding agent (P<0.05).However, when SE Bond was utilized hybrid composite demonstrated significantly lower bond strength than that of other two groups (P<0.05).Conclusion: The performance of a particular composite is affected by the bonding system that is applied. A single composite resin may have different bond strength when combined with different bonding system.

In this paper, an imaging chip for acquiring range information using by 0.35 fill CMOS technology and 5V power supply has been described. The system can extract range information without any mechanical movement and all the signal processing is done on the chip. All of the image sensors and mixed-signal processors are integrated in the chip. The design range is 1.5m-10m with 18 scales.