Questions tagged [camera]

Use the Camera tag for any questions related to how to use a camera or webcam with the Raspberry Pi.

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2
votes
1answer
2k views

Using Pan and Tilt servos

I am trying to get pan and tilt camera working with Raspberry Pi. I have successfully gotten one servo to work following this tutorial: I also found this tutorial showing pan and tilt, although it ...
2
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2answers
2k views

Edge Detection using usb webcam

Can I use sobel edge detection or canny algorithm to detect edges in my RPI. Can any give me any link to how to accomplish this and what the prerequisites are for doing this?
6
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1answer
7k views

Autostart videostream without logging in

I am trying to auto-start a script, that starts a video stream via vlc on a raspberry pi with raspi camera. This is the code that starts the stream: raspivid -o - -t 0 -hf -w 640 -h 360 -fps 25 | ...
1
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3answers
726 views

Camera blinks but doesn't record

I am trying to start a stream on my Raspberry Pi Camera when I boot the Raspberry Pi. I have tried the following options: Using crontab @reboot /home/pi/video.sh & Using init.d Copied the script ...
1
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0answers
197 views

Camera Full Preview stops display

Using raspistill -fp -o test.jpg causes my monitor (actually a tv) to receive no input (just get a blue screen) for the duration of the preview. This also happens using the python picamera module with ...
1
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5answers
855 views

Advice on RPi taking high res pictures at timed intervals

I'm working on a project with my Raspberry Pi at the moment. I'll give a brief summary of what I'm trying to achieve. I would like my RPi to take high resolution pictures through a USB webcam at ...
0
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4answers
6k views

What do I need to setup in order to push a video stream to the web

I'm interested in using a Raspberry Pi and some webcam to stream video to the web. First, I would need to know how to setup the webcam. Second I would like to know if it is possible to push a ...
0
votes
2answers
764 views

Is it possible to set the desired DPI of an image created using raspistill?

I realize that the amount of information taken by raspistill is the same regardless of the DPI of the output, but nonetheless - is it possible to set this on the command line? If not, what utility ...
1
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2answers
3k views

What is the best way to capture still time-lapse from logitech C920 on raspberry pi

I'm looking to use a Logitech C920 to capture still images (which I will later sew into a time lapse) Is it possible to use raspi-still to do this? I've read about the streaming solutions and using ...
6
votes
5answers
4k views

Raspberry Pi as surveillance cam?

I want to use the Raspberry Pi and the camera board as surveillance camera: As soon as a movement is detected, an event shall be raised, e.g. a mail sent. What I am wondering about: Do the typicall ...
5
votes
1answer
1k views

Is the camera module present?

Is there a way to tell whether the camera module is present without actually trying to record a video or take a photo? I thought maybe i2cdetect would show it up since the camera uses the i2c, but it ...
0
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1answer
5k views

Raspistill fullscreen preview with valid aspect ratio on composite PAL 16:9 display

Software: raspbian, hardware: Pi model B 512 with camera board Display: rear view car display, PAL composite input, 480x272 resolution, 16:9 aspect ratio Goal: I'd like to shot still images with ...
5
votes
1answer
32k views

Getting correctly exposed photos and the right shutter-speed for the RPi camera board using raspistill

I'm using my Raspberry Pi with the RPi camera board to capture a time-lapse video of outdoor scenery using the raspistill command. As I am uploading the photos to a server after I take each photo, I'm ...
6
votes
2answers
5k views

Camera Module Turn LED Off

I've made the disable_camera_led=1 change to the sudo nano /boot/config.txt and rebooted my Pi. The issue is the LED has stayed on? How do I turn it off?
2
votes
1answer
4k views

Calling RaspiStill from C program using WiringPi

I am trying to create a C program that would call RaspiStill or RaspiVid when one of the GPIO's is triggered high. I would like it into fit into this program that I have already created... include &...
2
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2answers
3k views

How to add usb webcam and WiFi to RPi model A without ruinning power consumption?

So I managed to diminish my RPi model A power consumption to the impressive mark of 70mA (underclock + replacing the 3v3 regulator). Low current is important because it is a mobile app (robot/car ...
1
vote
1answer
915 views

MMAL Raspberry Pi Speed

Does anyone know if there is a way to improve the speed of taking photos with raspistill? I have a Python program which basically calls "subprocess.call" - I've noticed that the speed of such an ...
28
votes
2answers
4k views

Can I use a USB webcam?

Is it possible to use a standard USB webcam with the RPi, or is there a specific peripheral that should be used? I would like to use RPi's to stream images from webcams to the net.
3
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0answers
367 views

Show *modified* video from camera on screen

There are many tutorials how to show video from camera on screen (like this one). I need to modify video stream with simple but custom filter. Stream may be low-res, so CPU should have enough juice. ...
1
vote
1answer
3k views

raspivid option -n together with ‐awb or -ev

When I run raspivid with -n option I cannot use options -awb and -ev does not work either. My goal is to use camera in greyscale mode without a preview window. When I tested with -ev off then video ...
5
votes
2answers
8k views

WPUT is uploading pictures captured by Motion over FTP, but JPGs are blank?

I have been following this guide here and have got everything to work except the images being uploaded to my server are all blank. Here is an example of one of the blank image files. The JPGs ...
1
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1answer
2k views

Unable to use time lapse feature with RaspiStill

For some reason RaspiStill has lost some of its functionality. When I tried to use the -tl argument it doesn't produce any photos and seems to hang up. The full command I am running is: raspistill -...
4
votes
2answers
4k views

Setting up an IP Camera on raspberry pi

I'd like to setup my raspberry pi to work as an IP Camera. Can you please point me to guides on how to do that - I am unable to find resources in particular for the two-way audio part of it. I am ...
0
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1answer
2k views

the script can't take picture with raspberry pi camera?

I am running a simple program on the raspberrypi camera, 'raspistill' works in the command shell, however when it comes to program it on python, the simple script doesn't seem to take pictures for me, ...
3
votes
1answer
911 views

How to access raw video data from CSI camera?

I'm developing an augmented reality sort of app for the Pi, but I need access to the video data (pixel data) to tweak things programmatically from a C program, then display the modified frames. How ...
6
votes
1answer
3k views

What method should I use to track a moving object with a moving camera (using resources of RaspberryPi)

I'm playing around with motion detection through a webcam connected to RaspberryPi using OpenCV and cvBlob in C++. I want to kick it up a notch and make a robot that detects and tracks movement ...
1
vote
1answer
126 views

Camera board and reflective strip

Trying to use the Raspberry Pi camera board to capture an image when it "sees" a reflective strip. Is this possible? How could I go about doing this?
3
votes
1answer
803 views

How fast should the camera board be?

What is a reasonable speed to expect from the raspberry pi camera board? It seems to take about 15-20 seconds per photo in some cases - is this just how it works or are there some hidden settings ...
5
votes
1answer
19k views

How can I run a terminal command (bash) from C#/Mono?

I've got an asp.net mvc website up and running great on the pi, and I'm even blinking an led - however, I would like to take a picture from the site using the raspberry pi camera board. I am ...
1
vote
1answer
11k views

How to read values with pyserial?

I'm using a CMUCam4 connected to the usb port. So far I've tried this: import serial cam = serial.Serial("/dev/ttyUSB0",19200) cam.write("GV \r") #call get version result = cam....
3
votes
2answers
1k views

Tutorial Guidance - Writing Web Apps for my RPi

With disastrous results expected, I configured Raspbian with no GUI (all memory to the system) with LAMP, Webmin, and Samba. It works very well albeit slower than my dual core LAMP, and Webmin shows ...
1
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1answer
1k views

Raspberry Pi camera feed is slow

I managed yesterday to hook my "LifeCam VX-800" to my Raspberry Pi. It works just fine, but it's very very slow. I tried adjusting that by decreasing the sleep duration in the code, but that didn't ...
2
votes
1answer
5k views

best ffmpeg settings for iSpy server

At the moment I have setup streaming via nginx rtmp-module wrapped in FLV h264. This works really great for integrating into a website. But now I want to actually record and do motion analysis and ...
6
votes
1answer
11k views

How can I send a constant stream of the camera module to the screen?

Right now if I type: raspistill -t 60000 I can see the image on screen for 60 seconds, but I just want to show what the camera sees at all times. I am connected via HDMI.
16
votes
3answers
30k views

Enabling high resolution capture from web camera

I'm experimenting with using the Pi for web cam streaming and motion detection, with the motion app. Trying a few different web cameras and combinations with other hardware, I've found one combination ...
1
vote
2answers
293 views

Is it possible to install update for raspbian onto and SD card via my Mac and install it on the rpi later

Apparently I have Model A and cannot connect to internet (at the moment, without additional part). Specifically I am trying to install the update that allows the RPI camera module to work. Is it ...
0
votes
1answer
779 views

Photometer / Colormeter

I am wondering if there is a photometer/colormeter sensor that would be easily plugged into a raspberry pi. I am looking at driving my Philips HUE from the exterior light color, to brighten my ...

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