Idea Book - ScanBot Video and NXTLog
I recently made a video of ScanBot, the robot I contributed to the Idea Book. You can see it below or in our Videos section. ScanBot scans black-and-white pictures using a Light Sensor, and displays the scanned images right on the NXT Display Screen: you don't need any special computer applications to run ScanBot or view the images he scans.
You can also see a NXTLog of ScanBot here.
-Jonathan
You can also see a NXTLog of ScanBot here.
-Jonathan
Comments
Excellent video!
Rick
Jim
Amazing resolution! Can you tell a little how you get this level of accuracy? Since the light sensor is hardly 'point-like' detector, I find the final outcome amazingly accurate.
Guy Ziv
--
Brian davis
Blake
P.S. I have also found the chapter on BT to be top notch writing. I have not built all the robots yet but having examined the programs for them I have to say that this is probably one of the strongest books out there with beginner, middle, and advanced users all coming away happy.
Guy,
I didn't use any fancy techniques other than putting the sensor close to the paper and taking measurements frequently (that tone you hear as the Light Sensor moves across the paper is actually a series of short beeps - one for each time a measurement is taken). Also, the user can set the threshold between black and white, to compensate for different lighting, shadows, etc.
Since the light sensor doesn't measure tiny portions at a time, it isn't too good at picking up small spaces between black lines. However it works well for semi-basic shapes and large letters.
-Jonathan
Jonathan, your scanner looks interesting and the video is cool !
Yeah, I saw that scanner... kevinsquest is really good at robots. He took his robots off the website, though, because someone was sending him nasty e-mails.
-Jonathan