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comparison src/clojureDemo/OpenCv.clj @ 1:6d9bdaf919f7

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added clojureDemo source
author Robert McIntyre <rlm@mit.edu>
date Fri, 20 Aug 2010 00:32:44 -0400
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0:163bf9b2fd13 1:6d9bdaf919f7
1 (ns clojureDemo.OpenCv)
2
3 (import '(java.awt Rectangle Robot Toolkit) )
4 (import '(java.awt.image BufferedImage) )
5 (import '(java.awt Graphics2D Panel))
6 (import '(java.io File) )
7 (import '(javax.imageio ImageIO) )
8 (import '(javax.swing JFrame))
9 (import '(org.apache.commons.io FileUtils))
10 (import clojure.lang.LazySeq)
11 (import '(name.audet.samuel.javacv.jna highgui cv cxcore
12 cxcore$IplImage highgui$CvCapture$PointerByReference
13 highgui$CvVideoWriter$PointerByReference cxcore$IplImage$PointerByReference))
14 (import '(name.audet.samuel.javacv CanvasFrame JavaCvErrorCallback))
15
16 (.redirectError (JavaCvErrorCallback.))
17
18 (use 'clojure.contrib.repl-utils)
19 ;(use 'clojureDemo.Defines)
20 ;(use '[clojureDemo.Xuggle :only (cache)])
21
22 ;this is still a work in progress, I'll come back to it later when I understand
23 ;jna more thoroughly. the important abstraction here is
24 ;video-seq, which gives a lazy sequence of Intel Image Processing library images.
25
26 (defn naturals [] (iterate inc 0))
27
28 (defn- makePanel [image] (proxy [Panel] [] (paint [g] (.drawImage g image 0 0 nil))))
29
30
31 (defmulti display "Creates a JFrame and displays a buffered image" class)
32
33 (defmethod display
34 BufferedImage [image]
35 (let [panel (makePanel image)
36 frame (JFrame. "Oh Yeah!")]
37 (.add frame panel)
38 (.pack frame)
39 (.setVisible frame true )
40 (.setSize frame(.getWidth image) (.getHeight image))))
41
42 (defmethod display
43 cxcore$IplImage [image]
44 ( display (.getBufferedImage image)))
45
46 (defmethod display
47 String [image]
48 (display (highgui/cvLoadImage image highgui/CV_LOAD_IMAGE_COLOR)))
49
50 (defmethod display
51 LazySeq [s]
52 (display (first s)))
53
54
55
56 (def ext "jpg")
57 ;see below for the rationale for this choice of extention.
58
59 (def cache-location "/home/r/Desktop/vision-cache/")
60
61 (defn close-capture
62 [capture]
63 (highgui/cvReleaseCapture (highgui$CvCapture$PointerByReference. capture)))
64
65 (defn close-writer
66 [writer] (highgui/cvReleaseVideoWriter (highgui$CvVideoWriter$PointerByReference. writer)))
67
68 (defn- cache-path
69 [video]
70 (File. cache-location (.getName video)))
71
72 (defn- already-cached
73 "this is the simplest and most retarded way to do it"
74 [video]
75 (.exists (cache-path video)))
76
77 (defn write-frame
78 [capture target-dir n]
79 (let [image (highgui/cvQueryFrame capture)]
80 (if (nil? image) false
81 (highgui/cvSaveImage (str (File. target-dir (str n "." ext))) image))))
82
83 (defn- write-frame-bad
84 [capture target-dir n]
85 (println (str "saving frame: " n))
86 (let [image (highgui/cvQueryFrame capture)]
87 (if (nil? image) false
88 ( ImageIO/write (.getBufferedImage image) ext (File. target-dir (str n "." ext))))))
89
90 (defn- write-frames
91 [video target-dir]
92 (let [capture (highgui/cvCreateFileCapture (.getPath video))]
93 (dorun
94 (for [n (naturals) :while (write-frame capture target-dir n) ] nil ))
95 (highgui/cvReleaseCapture (highgui$CvCapture$PointerByReference. capture))))
96
97 (defn- cache-frames
98 [cache-location video]
99 (time
100 (do
101 (println "\"caching entire video structure... this will take a while... go get a snack or something :)\"")
102 (FileUtils/deleteDirectory (cache-path video))
103 (FileUtils/forceMkdir (cache-path video))
104 (write-frames video (cache-path video)))))
105
106 ;(defn cache
107 ; [video]
108 ; (if (already-cached video) nil (cache-frames cache-location video)))
109
110 (defn video-len
111 [video]
112 (alength (.list (cache-path video))))
113 (def video-len (memoize video-len))
114
115 (defn video-data
116 "since the opencv version is so absolutely unreliable..."
117 [video]
118 (let
119 [capture (highgui/cvCreateFileCapture (.getPath video))
120 info {:length (video-len video)
121 :width (highgui/cvGetCaptureProperty capture highgui/CV_CAP_PROP_FRAME_WIDTH)
122 :height (highgui/cvGetCaptureProperty capture highgui/CV_CAP_PROP_FRAME_HEIGHT)
123 :fps (highgui/cvGetCaptureProperty capture highgui/CV_CAP_PROP_FPS)
124 :codec (highgui/cvGetCaptureProperty capture highgui/CV_CAP_PROP_FOURCC)}]
125 (close-capture capture)
126 info))
127 (def video-data (memoize video-data))
128
129 (defn video-frame-path
130 [video n]
131 (File. (cache-path video) (str n "." ext)))
132
133
134 (defn- video-frame-ipl
135 [video n]
136 ; (cache video)
137 (let
138 [c++-managed (highgui/cvLoadImage (str (File. (cache-path video) (str n "." ext))) highgui/CV_LOAD_IMAGE_COLOR)
139 jvm-managed (.clone c++-managed)]
140 ;this bit with the cloning is so I can deal with Garbage Collection once and for all.
141 ;the cpp-managed image must be manually Garbage Collected, but it's clone is managed by
142 ;the JVM's Garbage Collector. By getting rid of the c++ part right here and now, no
143 ;other function has to worry about manual garbage collection ever again.
144 ;Unfortunately, this doesn't seem to work for certain types of files. It's not file-size
145 ;which is the issue, but something involving the image header.
146 (cxcore/cvReleaseImage (.pointerByReference c++-managed))
147 jvm-managed
148 ))
149
150
151 (defn- video-frame-buffered
152 "takes one frame from a video in constant time"
153 [video n]
154 ; (cache video)
155 (ImageIO/read (File. (cache-path video) (str n "." ext))))
156
157 (defn video-frame [video n] (video-frame-buffered video n))
158
159 (defn- dumb-write
160 [video n writer]
161 (let
162 [c++-managed (highgui/cvLoadImage (str (File. (cache-path video) (str n ext))) highgui/CV_LOAD_IMAGE_COLOR)]
163 (highgui/cvWriteFrame writer c++-managed)
164 (cxcore/cvReleaseImage (cxcore$IplImage$PointerByReference. c++-managed))))
165
166 (defn video-seq
167 "makes a lazy sequence of IPL images"
168 ;additionally, I want to pass metadata around with the sequence.
169 [video] ;(cache video)
170 (map #(video-frame video %) (range (video-len video))))
171 (defn video-writer
172 "uses data about the video to make a writer"
173 [data fileTarget]
174 (highgui/cvCreateVideoWriter
175 (str fileTarget)
176
177 ;(highgui/CV_FOURCC \P,\I,\M,\1) ;= MPEG-1 codec (112913.386195 msecs) (104 MB)
178 ;(highgui/CV_FOURCC \M,\J,\P,\G) ;= motion-jpeg codec (crashed)
179 ;(highgui/CV_FOURCC \M,\P,\4,\2) ;= MPEG-4.2 codec (107184.186774 msecs) (82 MB)
180 ;(highgui/CV_FOURCC \D,\I,\V,\3) ;= MPEG-4.3 codec (118308.933328 msecs) (83 MB)
181 (highgui/CV_FOURCC \D,\I,\V,\X) ;= MPEG-4 codec (99037.738131 msecs) (85 MB)
182 ;(highgui/CV_FOURCC \U,\2,\6,\3) ;= H263 codec (101141.993551 msecs) (89 MB)
183 ;(highgui/CV_FOURCC \I,\2,\6,\3) ;= H263I codec (crashed)
184 ;(highgui/CV_FOURCC \F,\L,\V,\1) ;= FLV1 codec (104307.567802 msecs) (93 MB)
185 ;(:codec data) ;= whatever the movie originally had. (98278.694169 msecs) (1.9 GB)
186
187 (:fps data) (cxcore/cvSize (:width data) (:height data))
188 1; 1 here means that we're writing in color.
189 ; you cannot change it to 0 to write in
190 ; black and white. Everything just crashes instead.
191 ; what a useful paramater.
192 ))
193
194
195 (defn naturals [] (iterate inc 0))
196
197
198 (defn write-frame-2
199 [writer frame]
200 (let [c++-frame (cxcore$IplImage/createFrom frame)]
201 (highgui/cvWriteFrame writer c++-frame)
202 ; (cxcore/cvReleaseImage (.pointerByReference c++-frame)))
203 )
204 frame)
205
206 (defn save-seq
207 [writer video-seq]
208 (map #(write-frame-2 writer %) video-seq))
209
210 (defmacro trans-save
211 "there's a small problem with trans-save --- it IS
212 truly transitive, but it does too much work....
213 sometimes it writes files twice.
214 this is functionally correct though."
215 [target config video-seq]
216 `(let [writer# (video-writer ~config ~target)]
217 (do
218 (dorun (save-seq writer# ~video-seq))
219 (close-writer writer#)
220 ~video-seq)))
221
222
223
224 (comment
225 (do (use :reload-all 'clojureDemo.OpenCv) (in-ns 'clojureDemo.OpenCv))
226 )