Dissertation > Excellent graduate degree dissertation topics show

Single Image Light Positioning Based on Render

Author: LuoXiaoLing
Tutor: ZhangShiJun
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: Image Understanding Light source positioning Image rendering Image evaluation
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 4
Quote: 0
Read: Download Dissertation

Abstract


In the field of computer vision, image understanding is very important one branch, while the image for accurate understanding of an important part of the determination of the light source information is not negligible. Determined the three-dimensional object, as long as it is coupled with appropriate light, will be able to recover the information in the source image, allowing the system to be able to better understand the image. To this end, this paper proposes a positioning system based rendering light source, through the the image understanding three-dimensional model, and then rendering software modeling, and thus render the different position of the light source, and ultimately get the light source of the input image The estimate of the location. As in the process of image understanding, all of the image information obtained from the known image, which is equivalent to solving a reverse process. The introduction of image rendering three-dimensional objects and light sources of information will be able to determine an image, so that the position of the light source parameter becomes a positive test root process, directional traversal by the position of the light source, and then get a source image recent image corresponding to the light source position, namely, the method of the best estimate of the parameter of the light source position, such that the light source positioning method easier to understand, and which has a higher reliability. This paper analyzes the necessity and feasibility of the light source is positioned in the process of image understanding, and by analyzing the historical development and research status of the light source localization algorithm, and rendering of image understanding-based algorithm framework to analyze the feasibility of the algorithm. Then this article focuses on the theory based on algorithmic process of rendering light source positioning system, and the associated image rendering as well as grayscale evaluation and limitations encountered for the experiment. Problems encountered in the course of the experiment carried out in-depth analysis to optimize the evaluation function. The positioning algorithm based on the rendering of the light source relative to the advantages of traditional operators, the comparison of a single light source positioned two angles from the diversity of objects precision comparison under a single light source and a single light source with the traditional algorithm. Then the light source classification algorithm simulation experiments, and the experimental results were analyzed; classification after two precise positioning for precise positioning of the light source in the classification range, and two methods of simulation experiments, and finally comparing the results of the two experiments, found directivity search way to obtain accurate positioning result, not only has a high accuracy, and greatly improving the efficiency of the precise positioning.

Related Dissertations

  1. Research on Hyperspectral Image Compression Method Based on Information of Interest,TP391.41
  2. Multi-polarization Synthetic Aperture Radar system with polarization information processing,TN957.52
  3. Image-building on Public Library,G258.2
  4. Research and Application on Water Quality Bio-monitoring System Based on Dynamic Image Understanding,TP391.41
  5. Research on Image Segmentation and Scene Understanding Using Discriminative Learning Method,TP391.41
  6. Research on Flip Invariant Feature Description and Matching Method,TP391.41
  7. Image Evaluation of the Optical Transmission Through Inhomogeneous Medium,O435.1
  8. A Research on the Technology of On-Orbit Calibration and Validation of China DMC Microsatellite,V556
  9. Graphics-based understanding of the amount of information to obtain the construction principle , method and application,TU721
  10. In the lower image understanding algorithms,TP391.41
  11. Research on the Key Technology for Aperture Synthesis Microwave Radiometric Imaging System,TP391.41
  12. Research on Motion Planning and Image Understanding for Autonomous Mobile Robot,TP242.6
  13. Design and Research of Water Quality Bio-Monitoring Sensor Based on Dynamic Image Understanding,TP391.41
  14. Intelligent Transportation Monitoring Technology Based on Dynamic Image Understanding,TP391.41
  15. A Method Study on Automatic Recognition and Classification of Earthquake-caused Building Damage in Cities Using Remote Sensing,P315.9
  16. Some Research on Realizing Speckle Suppression and Evaluation for SAR Images,TN957.52
  17. The roads intelligent remote sensing image based on the model constraints extraction technology research,P237
  18. Research on Image-based Rendering Construction and Navigation in Virtual Environment,TP391.9
  19. Foundation Research of Image Understanding Progress for Biology Characteristic-based Robot,TP242.62
  20. Image/Video Text Extraction and Its Application,TP391.43

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
© 2012 www.DissertationTopic.Net  Mobile