Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

Awesome Lists | Featured Topics | Projects

https://github.com/abarbu/ccv-chicken

Chicken scheme egg with bindings for CCV, a computer vision library
https://github.com/abarbu/ccv-chicken

Last synced: 26 days ago
JSON representation

Chicken scheme egg with bindings for CCV, a computer vision library

Awesome Lists containing this project

README 

        
[[tags: egg misc]]

[[toc:]]



Do not edit this page, it is maintained in the this package's [https://github.com/abarbu/csp github repository].



= CCV =



Chicken scheme egg with bindings for

[https://github.com/liuliu/ccv.git/ ccv], a computer vision library.



Note that you will need to fetch the git submodules in this

package. In addition this egg compiles ccv with options that require

libjpeg, libpng, gsl, fftw3, and cblas. ccv takes a very long time to

compile.



=== API ===



(read-image image-filename)

(read-greyscale-image image-filename)

(write-image image filename)



Read and write images, return #f on failure. The former always

produces a color image.



(imlib-image->ccv-image image)

(imlib-image->ccv-greyscale-image image)



These provide imlib intergration, see the

[http://wiki.call-cc.org/eggref/4/imlib2 imlib] egg for how to use it.

Note that imlib always stores images in color so the latter call will

always convert the image.



==== DPM ====



(load-dpm-mixture-model filename)



Load in a DPM model. Returns #f when the file does not exist, a ccv assertion failure

happens if the file does not contain a model.



(make-dpm-detection x y w h confidence)

(dpm-detection-x detection)

(dpm-detection-y detection)

(dpm-detection-w  detection)

(dpm-detection-h detection)

(dpm-detection-confidence detection)



Create and access DPM detections.



(dpm-detect-object color-image model #!key (threshold 0.6) (interval 8))



Returns a list of detections, does not return part locations at the moment.



==== SIFT ====



(make-sift x y octave level scale angle descriptor)

(sift-x descriptor)

(sift-y descriptor)

(sift-octave descriptor)

(sift-level descriptor)

(sift-scale descriptor)

(sift-angle descriptor)

(sift-descriptor descriptor)



Create and access SIFT descriptors detections. A descriptor is a

vector of inexacts.



(sift greyscale-image #!key (noctaves 3) (nlevels 6) (up2x 1) (edge-threshold 10) (norm-threshold 0) (peak-threshold 0))



Run sift on an image and return a list of descriptors.



(sift-match image-sift object-sift #!key (threshold 0.36))



A Scheme version of ccv's siftmatch. Given the sift descriptors for an

image it attempts to find correspondences to an object's sift descriptors.



==== SWT ====



(make-swt-detection x y width height)

(swt-detection-x detection)

(swt-detection-y detection)

(swt-detection-width detection)

(swt-detection-height detection)



Create and access SWT detections.



(swt-detect-words greyscale-image)



Detect text in images, returns a list of swt-detections.



==== Caching ====



(ccv-enable-default-cache)

(ccv-disable-cache)

(ccv-drain-cache)



CCV maintains an internal cache to speed up computations. These

functions allow you to manage it.



===== Example ======



  (let img (image-load "/tmp/a.jpg"))

  (for-each (lambda (swt)

      (image-draw-rectangle img 

                            (color/rgba 255 0 0 255)

                             (swt-detection-x swt) (swt-detection-y swt)

                             (swt-detection-width swt) (swt-detection-height swt)))

   (swt-detect-words (read-greyscale-image "/tmp/a.jpg")))

  (image-save img "/tmp/b.png")



=== License ===



   Copyright 2012 Andrei Barbu. All rights reserved.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU Lesser General Public License as published by

   the Free Software Foundation, either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License

   along with this program.  If not, see .