Difference between revisions of "Convex Mirror"

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(Background Subtract)
(draw a circle)
Line 39: Line 39:
 
**<code>python bgprocessing.py ~/Pictures/raspi/frame0031.jpg</code>
 
**<code>python bgprocessing.py ~/Pictures/raspi/frame0031.jpg</code>
 
=draw a circle=
 
=draw a circle=
*add a circle:
+
*add a circle to background:
**<code>convert edge.png -stroke White -fill none -strokewidth 1 -draw 'circle 725,725 40,725' edge_circle.png
+
**<code>convert background.jpg -stroke White -fill none -strokewidth 1 -draw 'circle 715,740 35,740' bgcircle.png
 
</code>
 
</code>
  

Revision as of 07:14, 4 April 2013

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Self Portrait in a Convex Mirror

Workflow

RPi side

  • take photo on raspberry pi:
    • gphoto2 --capture-image-and-download --filename capt0004.jpg
  • send to laptop:
    • cp capt0004.jpg rtwomey@192.168.2.1:~/Pictures/raspi
  • USB reset device:
    • usbreset /dev/bus/usb/001/004

OS X side

  • crop:
    • convert ~/Pictures/raspi/frame0001.jpg -crop 1450x1450+779+275 +repage square0001.jpg
  • bg subtract:
    • python bgsubtract.py square0002.jpg square0008.jpg 20 2
  • edge detect:
    • python edge.py square0001.jpg 20 255
  • convert to pnm:
    • convert square0001_edge.png edge0001.pnm
  • vectorize:
    • potrace edge0001.pnm --tight -i -s -o frame0001.svg
  • send to gcode machine:

Helper script:

  • python process_image.py ~/Pictures/raspi/frame0024.jpg
  • produces frame0024.svg

Background Subtract

  • subtract one image from background with given threshold and dilations:
    • python bgsubtract.py background.jpg square.jpg 66 10

Processing from commandline

  • install processing-java from tools menu in processing
  • run from command line:
    • processing-java --sketch=/Users/rtwomey/processing/dm_xml/convexmirror_cmdline --output=tmp/convexmirror --run --force
    • NOTE: all filenames in the app need full paths.
  • run workflow with processing from commandline:
    • python bgprocessing.py ~/Pictures/raspi/frame0031.jpg

draw a circle

  • add a circle to background:
    • convert background.jpg -stroke White -fill none -strokewidth 1 -draw 'circle 715,740 35,740' bgcircle.png

Error Image + Drawing Image

  • compute new contours from error image. NOT DONE.
  • accumulate error image. NOT DONE.
  • accumulate drawing image. NOT DONE.