https://github.com/jywarren/rails-vw

A rails RESTful API for NASA's Vision Workbench suite
https://github.com/jywarren/rails-vw

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A rails RESTful API for NASA's Vision Workbench suite

• Host: GitHub
• URL: https://github.com/jywarren/rails-vw
• Owner: jywarren
• Created: 2010-04-15T21:15:10.000Z (over 14 years ago)
• Default Branch: master
• Last Pushed: 2010-04-17T19:20:33.000Z (over 14 years ago)
• Last Synced: 2024-10-14T08:15:12.534Z (3 months ago)
• Language: Ruby
• Homepage: http://github.com/jywarren/railsvw
• Size: 92 MB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README

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README

        
A rails RESTful API for NASA's Vision Workbench suite

## Process ##

- client submits request with 2 image URLs and 

- see if we already have an entry for the image based on filename and other tags? can we do much of this without downloading the image?

- temporarily download the images

- store Image:

	- captured_on, name, exif_data (text field), progress ('ipfinding','ipmatching','complete')

- store SharedInterestPoint

	- image_1_id, image_2_id, x1, y1, x2, y2

- find and match interest points

- create Image and SharedInterestPoint objects in db

- return id for image, plus status

- client can ask for process progress. when state = 'complete' it may request the final data

- return Image unique id and list of interest points and coordinates with regard to image top-left

## Models ##

Image

	- (basic atttachment_fu)

script/generate scaffold Image parent_id:integer content_type:string filename:string thumbnail:string size:integer width:integer height:integer captured_on:timestamp exif_data:text progress:string

	

SharedInterestPoint

script/generate scaffold SharedInterestPoint image_1_id:integer image_2_id:integer x1:integer y1:integer x2:integer y2:integer interest:float

## Vision Workbench ipfind/ipmatch output ##

Interest Points are identified by VW's ipfind and stored in binary foo.vwip files

* Int - Number of interest points.

-- repeatedly for every ip ---

* Float - x location

* Float - y location

* Int - integer x location

* Int - integer y location

* Float - orientation (Direction in radians of the feature's major axis. Used to calculate descriptor.)

* Float - scale (Unitless number of size.)

* Float - interest (Unitless number of interesting-ness.)

* Char - polarity (Not really used)

* Unsigned - Octave

* Unsigned - Scale Level

* Int - size of descriptor

-- repeatedly for every element of descriptor ---

* Float - element of descriptor

Matches are identified by VW's ipmatch and stored in binary foo.match files

These can be read by Ruby like so:

>> file = File.new('public/test/mit-google__mit-ours.match','r')

=> #

>> field = file.read(8).unpack("I")

=> [327680]

All types are listed here: http://ruby-doc.org/core/classes/String.html