supporting landmark image retrieval with skyline extraction techniques
Download
Skip this Video
Download Presentation
Supporting Landmark Image Retrieval with Skyline Extraction Techniques

Loading in 2 Seconds...

play fullscreen
1 / 17

Supporting Landmark Image Retrieval with Skyline Extraction Techniques - PowerPoint PPT Presentation


  • 98 Views
  • Uploaded on

Supporting Landmark Image Retrieval with Skyline Extraction Techniques . Date : 2012 / 04 / 12 資訊碩一 10077034 蔡勇儀 @ LAB603 . Outline. Introduction Preliminaries Method Experimental result Conclusions. Introduction. Image retrieval have more challenge than text retrieval.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Supporting Landmark Image Retrieval with Skyline Extraction Techniques ' - oistin


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
supporting landmark image retrieval with skyline extraction techniques

Supporting Landmark Image Retrieval with Skyline Extraction Techniques

Date :2012 / 04/ 12

資訊碩一 10077034 蔡勇儀 @LAB603

outline
Outline
  • Introduction
  • Preliminaries
  • Method
  • Experimental result
  • Conclusions
introduction
Introduction
  • Image retrieval have more challenge than text retrieval.
  • Use low-level feature to identify objects is non-trivial.
  • Skyline is a good feature to identify landmark contour.
outline1
Outline
  • Introduction
  • Preliminaries
  • Method
  • Experimental result
  • Conclusions
traditional image retrieval
Traditional image retrieval
  • Traditional techniques for image retrieval rely on some metadata (i.e., keywords or captions of image)
  • It isn’t a good method for practical applications since it is labor intensive and need more space.
content based image retrieval
Content-based image retrieval
  • Content-based image retrieval(CBIR) is using image’s feature for retrieval.
  • Query-by-example
  • Query-by-sketch
  • Relevance feedback technique
identifying landmarks with skylines
Identifying landmarks with skylines
  • Region-growing-based
    • Using same color region extend find the skylines
    • Weak robustness on the sky with cloud or complex background
  • Edge-based
    • Edge detection
    • Retaining the points which are luminous intensity change sharply
    • Using other method to find clear skyline.
outline2
Outline
  • Introduction
  • Preliminaries
  • Method
  • Experimental result
  • Conclusions
method 1 4 difficulties
Method(1/4) - Difficulties
  • Small portion of edge points constitute the proper skyline.
  • Skyline may not fully-connected.
  • Steep or tortuous.
method 2 4 ron
Method(2/4) - RON
  • RON(radius of neighborhood)
    • Defining the search region

(ex. RON = 2 -> grid zone = 5*5)

    • Solving the difficulties.
method 3 4 direction priority
Method(3/4) – Direction priority
  • Using clockwise
    • Good direction for traversal skyline.
method 4 4 find the skyline
Method(4/4) – Find the skyline
  • Using Sobel Filter for edge detection
  • Using DFS for search. (Need decide the start point?)
outline3
Outline
  • Introduction
  • Preliminaries
  • Method
  • Experimental result
  • Conclusions
experimental result
Experimental Result
  • DP VS This method ( O(n2) & O(n) )
outline4
Outline
  • Introduction
  • Preliminaries
  • Method
  • Experimental result
  • Conclusions
conclusions
Conclusions
  • This is a feasible for landmark image retrieval.
  • If there are more line cross the image?
  • If sky have complex object(ex. Light or cloud…)?
  • If the beginning point is not in skyline?
  • More problem need to solving…
ad