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→Step 4 Building the Gears
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==EHP - 3D Scaning Project== | ==EHP - 3D Scaning Project== | ||
[[File:Laser_step0.png|700px]] | |||
<br> | <br> | ||
It's a project involved with 3D Scan. | It's a project involved with 3D Scan. | ||
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====Step 4 Building the Gears==== | ====Step 4 Building the Gears==== | ||
Use the gears of the Lego parts. The detailed pictures showed below. | Use the gears of the Lego parts. The detailed pictures showed below. | ||
<videoflash type=vimeo>42917722</videoflash> | |||
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[[File:laser_step9.png|800px|]] | [[File:laser_step9.png|800px|]] | ||
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Notice that the switcher for triggering the stepper is removed from the circuit. David software will send ‘S’ through the serial port when the start button is clicked, and ‘T’ will be sent if the stop button is clicked. In order to synchronize the software with the hardware, a function of triggering the stepper by receiving ‘S’ and ‘T’ is written in the code. | Notice that the switcher for triggering the stepper is removed from the circuit. David software will send ‘S’ through the serial port when the start button is clicked, and ‘T’ will be sent if the stop button is clicked. In order to synchronize the software with the hardware, a function of triggering the stepper by receiving ‘S’ and ‘T’ is written in the code. | ||
Complete code with very detailed comments can be found here. | Complete code with very detailed comments can be found here. | ||
====Step 6 Camera calibration==== | |||
Make the calibration board, which has two perpendicular wood boards with the right pattern. The calibration pattern to be printed out for the board can be found [[Media:Laser_printout.zip|here]]]. | |||
[[File:laser_step10.png|600px|]] | |||
Connect the camera and Arduino to computer, and launch the David software. | |||
Use the right settings for the David： | |||
[[File:laser_step11.png|700px|]] | |||
Please adjust the camera settings; the picture captured by camera should be as bright as possible while the black dot on the calibration board can still be clearly recognized. Like the picture showed below. | |||
[[File:laser_step12.png|600px|]] | |||
Click the “Calibrate” button to finish calibration. Notice that once you finish the calibration, the position of the camera can’t be changed anymore. | |||
====Step 7 First scan==== | |||
Now everything is ready. We could start our first scan. Do remember to check the “Record new motion “option. One important thing is you need to re-adjust the camera setting, unlike the calibration picture, now you need to achieve a picture as black as possible while only the laser line could be easily recognized ,and you can also adjust the laser focus to make it as thin as possible. Like the picture showed below. | |||
[[File:laser_step13.png|700px|]] | |||
====Step 8==== | |||
Once you finish the first scan. We can do the repetition scan. Just make sure the relative position of the laser and the camera is fixed and we can remove the calibration board to scan anything we want. We now finish the mobile laser scanner. | |||
Here is some demo scan result from the official David site (from the commercial version) . | |||
[[File:laser_step14.png|700px|]] | |||
===Related Links To That Topic=== | ===Related Links To That Topic=== | ||
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*[http://www.david-laserscanner.com/wiki/user_manual/scanning_without_background David scanner Manuel to scan without background] | *[http://www.david-laserscanner.com/wiki/user_manual/scanning_without_background David scanner Manuel to scan without background] | ||
*[http://www.david-laserscanner.com/forum/viewtopic.php?p=8289#p8289 A hobbyist built up his own 3D scan hardware for David system ] | *[http://www.david-laserscanner.com/forum/viewtopic.php?p=8289#p8289 A hobbyist built up his own 3D scan hardware for David system ] | ||