RaspberryPi/USB Camera - Revision history

Admin: /* Flags */

2017-10-23T02:54:34Z

Flags

← Older revision		Revision as of 02:54, 23 October 2017
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	{{PiFlag}}		{{PiFlag}}

			[[Category:Images]]
			[[Category:Images]]
	[[Category:August 2016]]		[[Category:August 2016]]

Admin: /* OpenCV */

2017-10-23T02:50:01Z

OpenCV

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 =OpenCV=
 An image can be captured from a USB camera/webcam using OpenCV. Normally this would be a bit much for a simple webcam photo, but if you're already using OpenCV for image processing, it may be more convenient.
@@ Line 160: / Line 162: @@
 </pre>
 =Projects=

Admin: /* Projects */

2017-10-22T17:29:17Z

Projects

← Older revision		Revision as of 17:29, 22 October 2017
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	[[Image:MotionCameraControl.png\|500px]]		[[Image:MotionCameraControl.png\|500px]]

			=OpenCV=

			An image can be captured from a USB camera/webcam using OpenCV. Normally this would be a bit much for a simple webcam photo, but if you're already using OpenCV for image processing, it may be more convenient.

			Here's a simple script (via Software Recommendations Stack Exchange) [https://softwarerecs.stackexchange.com/questions/18134/python-library-for-taking-camera-images]:

			<pre>
			import time
			import cv2
			camera_port = 0
			camera = cv2.VideoCapture(camera_port)
			time.sleep(0.1) # If you don't wait, the image will be dark
			return_value, image = camera.read()
			cv2.imwrite("opencv.png", image)
			del(camera) # so that others can use the camera as soon as possible
			</pre>


	=Projects=		=Projects=

Admin: /* Motion program for camera stream (Success) */

2017-10-22T15:55:52Z

Motion program for camera stream (Success)

← Older revision		Revision as of 15:55, 22 October 2017
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	=Motion program for camera stream (Success)=		=Motion program for camera stream (Success)=

	You can also stream from your camera using the motion program. ~~(Apparently. Haven't gotten it working yet.)~~		You can also stream from your camera using the motion program.

	The problem: can't stream images using the motion program. I know the camera works with the Pi b/c I can capture still images, so it isn't a power issue. I can see motion dumping out still images, so it isn't a communication issue with the camera.		The problem: can't stream images using the motion program. I know the camera works with the Pi b/c I can capture still images, so it isn't a power issue. I can see motion dumping out still images, so it isn't a communication issue with the camera.

Admin: /* Flags */

2016-08-18T03:06:35Z

Flags

← Older revision		Revision as of 03:06, 18 August 2016
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	[[Image:MotionCameraControl.png\|500px]]		[[Image:MotionCameraControl.png\|500px]]

			=Projects=

			Now that we have the camera up and operational, and we're happy with the preliminary results... what next?

			==Timelapse 4==

			See [[RaspberryPi/Timelapse 4]]

	=Flags=		=Flags=

Admin: /* Fswebcam */

2016-08-18T03:05:18Z

Fswebcam

← Older revision		Revision as of 03:05, 18 August 2016
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	[[Image:USBCamera2.jpg\|500px]]		[[Image:USBCamera2.jpg\|500px]]

	==Fswebcam==		==Fswebcam (Success)==

	The camera didn't come with instructions, but controlling it was insanely easy [https://www.raspberrypi.org/documentation/usage/webcams/]:		The camera didn't come with instructions, but controlling it was insanely easy [https://www.raspberrypi.org/documentation/usage/webcams/]:

Admin: /* Better Pictures */

2016-08-17T19:59:53Z

Better Pictures

← Older revision		Revision as of 19:59, 17 August 2016
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	[[Image:USBWebcamPhoto2.jpg\|500px]]		[[Image:USBWebcamPhoto2.jpg\|500px]]

			Wow! That's good enough to use for computer vision to detect cat faces.

	=Motion program for camera stream (Success)=		=Motion program for camera stream (Success)=

Admin: /* Fswebcam */

2016-08-17T19:59:22Z

Fswebcam

← Older revision		Revision as of 19:59, 17 August 2016
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	$ apt-get install fswebcam		$ apt-get install fswebcam
	$ fswebcam image.jpg		$ fswebcam image.jpg
			</pre>

			aaaaand, now you have your first picture. To serve it up with a lightweight Python web server,

			<pre>
	$ python -m SimpleHTTPServer 8000		$ python -m SimpleHTTPServer 8000
	</pre>		</pre>

Admin: /* Setup/Usage */

2016-08-17T19:58:55Z

Setup/Usage

← Older revision		Revision as of 19:58, 17 August 2016
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	[[Image:USBCamera2.jpg\|500px]]		[[Image:USBCamera2.jpg\|500px]]

	==~~Setup/Usage~~==		==Fswebcam==

	The camera didn't come with instructions, but controlling it was insanely easy [https://www.raspberrypi.org/documentation/usage/webcams/]:		The camera didn't come with instructions, but controlling it was insanely easy [https://www.raspberrypi.org/documentation/usage/webcams/]:

Admin: /* Motion program for camera stream */

2016-08-17T19:58:33Z

Motion program for camera stream

← Older revision		Revision as of 19:58, 17 August 2016
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	[[Image:USBWebcamPhoto2.jpg\|500px]]		[[Image:USBWebcamPhoto2.jpg\|500px]]

	==Motion program for camera stream==		=Motion program for camera stream (Success)=

	You can also stream from your camera using the motion program. (Apparently. Haven't gotten it working yet.)		You can also stream from your camera using the motion program. (Apparently. Haven't gotten it working yet.)
Line 43:		Line 43:
	The problem: can't stream images using the motion program. I know the camera works with the Pi b/c I can capture still images, so it isn't a power issue. I can see motion dumping out still images, so it isn't a communication issue with the camera.		The problem: can't stream images using the motion program. I know the camera works with the Pi b/c I can capture still images, so it isn't a power issue. I can see motion dumping out still images, so it isn't a communication issue with the camera.

	===Installing motion===		==Installing motion==

	<pre>		<pre>
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	</pre>		</pre>

	===Configuring motion===		==Configuring motion==

	Now modify the motion config file to allow for webcam streaming:		Now modify the motion config file to allow for webcam streaming:
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	</pre>		</pre>

	===Start motion daemon===		==Start motion daemon==

	To start the motion daemon:		To start the motion daemon:
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	</pre>		</pre>

	===Monitoring stream===		==Monitoring stream==

	The monitoring stream is set in the configuration file to port 8080:		The monitoring stream is set in the configuration file to port 8080:
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	[[Image:MotionCameraStream.png\|500px]]		[[Image:MotionCameraStream.png\|500px]]

	===Control stream===		==Control stream==

	Control of the camera can be done via the web interface as well (including pan and tilt controls, if you have that set up). That's also set in the configuration file:		Control of the camera can be done via the web interface as well (including pan and tilt controls, if you have that set up). That's also set in the configuration file: