Questions tagged [cameras]

A camera is an optical instrument for recording or capturing images, which may be stored locally, transmitted to another location, or both.

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95 views

Hubsan x4 drone camera recording black

I'm unsure if this is the correct community to ask this question (vs. Electronics or Aviation Stack Exchange, for example), but I recently purchased a Hubsan x4 HD video drone from Amazon. This is my ...
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1answer
62 views

How to produce a continuous variation of a discontinuous function?

I have a differential equation that connects the "velocity" of a point in the FOV of a camera with the velocities of a robot's joints, that is $$\dot s=J(s) \dot q$$ where s is a vector with the $x$,$...
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Perspective n Point - RPnP algorithm

I need to caculate the pose of a camera using an image of an artificial landmkark. For this porpouse I am trying to use the Perspective n Point approach so I can calculate it using the intrinsic ...
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Choose and connect a camera to a robot [closed]

There are tons of cameras in devices around us these days. There are used photo cameras, smartphones, tablets at my home gathering dust. I wonder, what the easiest way could be to get a camera module ...
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2answers
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How to guide a camera through a circular tube?

Let's say I have a 6-DOF flying camera and I want to make it move through a circular tube autonomously and let's suppose that the camera and the system that makes it fly are considered to be just a ...
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2answers
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Suggestions on object types (features) to track from ARDrone 2 camera

UPDATE I have aded 50 bounty for this question on the StackOverflow I am trying to implement object tracking from the camera(just one camera, no Z info). Camera has 720*1280 resolution, but I ...
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1answer
74 views

Syncing camera with other signals

I am not sure if this is the best place to ask this question, but hopefully someone here can give me some advice. I have a device hooked up to a data acquisition system that can provide sync out ...
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1answer
182 views

Analogue video to digital [closed]

I have FPV camera which outputs analog video (RCA, PAL). I want to capture video and do image processing, therefore I need some way to convert the analog video to digital. Can some one recommend me ...
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0answers
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Is the distortion introduced by a lens protector significant in practice?

I have a computer-vision application I made to localize a robot in a room; the software has been in use for a while and is working fine. When I calibrated the camera and got the intrinsics and lens ...
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2answers
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How to tilt a camera 180 using mirrors

How would you vertically tilt a camera 180 degrees using mirrors? I'm trying to add a pan/tilt mechanism to a Raspberry Pi's camera. The camera uses one of those flat cables with unstranded wires, ...
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2answers
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Using an RGB + Depth Camera to locate X,Y,Z coordinates of a ball

I've recently been trying to use Gazebo to do some modelling for a couple tasks. I have a robot that's effectively able to locate a ball and get x,y coordinates in terms of pixels using a simple RGB ...
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3answers
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Real-time video processing on video feed from a drone's camera

I am working on a project where I want to run some computer vision algorithms (e.g. face recognition) on the live video stream coming from a flying drone. There are many commercial drones out there ...
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3answers
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Camera Calibration fails to run on ROS

I am running ROS Indigo on Ubuntu 14.04. I am doing a mono-camera calibration and trying to follow the camera calibration tutorial on the ROS Wiki. I give the following command: rosrun ...
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1answer
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Covariance and optimization

I am trying to build a map containing lamps as landmarks. I drive around with a robot and a monocular camera looking to the ceiling. The first step is detect the edges of each observed rectangular ...
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2answers
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Ceiling depth with a monocular camera

Having a camera mounted on my robot and looking upwards, I want to estimate the distance of the ceiling as the robot moves and also the position of landmarks observed on the ceiling (lamps for example)...
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1answer
682 views

How to calculate vehicle detection distance?

I would like to know how to calculate the distance to each car when I run my application for an autonomous vehicle in real-time. In addition, I want to know how to implement the calculation in C++. ...
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1answer
366 views

Kalman filter for estimating position with “direction” measurements

I am currently working on a pose estimation problem for which I would like to use filtering. To explain the system briefly, it consists of two cameras and each has its own GPS/IMU module. The main ...
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1answer
706 views

Kinect VS Stereo cameras [closed]

As I'm advancing in my project I realized I need better hardware, particularly for video input and processing. From an intuitive feeling sounds like stereo cameras offers a more powerful and flexible ...
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2answers
329 views

PTAM CameraCalibrator error

I am trying to run the cameracalibrator.launch using PTAM according to this Camera Calibration tutorial. However, when I do so, I get the following error: ...
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2answers
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ROS Calibration Camera Problems

I am trying to calibrate a monocular camera using ROS with the help of this website: How to Calibrate a Monocular Camera. When I run rostopic list, I get: ...
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Mini Recorder from RC Heli Parts

I had a RC Helicopter (with video,picture, and audio taking capabilities) that recently "died" (unrelated to short circuit). The reciever board short circuted, but the board that sent data to micro-sd ...
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2answers
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Question for those who have experience using stereo cameras/module (e.g. ZED, DUO M, Bumblebee, etc.)

This is a question for those of you who have experience using stereo cameras/modules like the ZED, DUO M, Bumblebee cameras, etc. (not TOF cameras). I can't find any sample disparity outputs out there ...
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2answers
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Can I control more than 18 servo motor with a Raspberry Pi

I'm trying to make an hexapod with 18 servo motors and i'm asking how to control them with a Raspberry Pi. (Never used it). I saw lot's of stuff to control 1, but 18, 20... Currently I'm working on ...
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1answer
668 views

Suggestion for a camera [closed]

Are there good low cost cameras that are frequently used in robotics? I am assuming there are cameras that are good fit for robotics ... Works well with OpenCV PC Windows support - USB2/USB3 (GigE, ...
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3answers
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How can I make a motion tracking camera?

I'm looking into CCTV, and am interested in minimising costs by having a motion tracking camera cover an area that would otherwise utilise multiple cameras. There is already something like this on ...
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1answer
141 views

How would I implement a following drone with a camera using GPS?

As the title states, is there any way to make a following drone that tracks a GPS unit, and follows/orients camera to that? Similar to this
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2answers
104 views

Conceptual problem regarding electronic shutters

I have been looking at CCD and CMOS sensors and cameras to decide which one to use in the process of automatic control of a printing process. By now I am getting the grips on almost all the essential ...
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1answer
1k views

Do structured light camera sensors work outdoors?

Do structured light camera sensors like the structure.io, Intel RealSense or Microsoft Kinect work outdoors? I read these sensors wont work outdoors because of ambient IR light. Can someone provide ...
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Depth of view for a hypercatadioptric camera

I am trying to determine the depth of view for a hypercatadioptric camera (camera lens system and a hyperbolic mirror) based on 1. The following illustration seems pretty clear. For an image point $...
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1answer
156 views

Simple way of 3d perception

I wonder is there any simple (can be computed in microcontroller level) option which is suitable for 3d object perception (depth, position, pose or coordinate estimation) of flying robots except LIDAR,...
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3answers
879 views

algorithm Simple Stereo Vision

I'm working in a project implementing a vision system. I'm a student and this is the first time I'm doing something like this, it has been a challenge. I'm using a controller (Netduino+2, .Net ...
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2answers
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Drones and camera streaming

How do you stream video feed from a camera on a drone? I would think that at high altitudes Wi-Fi won't work. So what would you usually do, and how?
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1answer
131 views

Best practice to write a ROS service for a serial-communication class with many options

I have been asked to write code to implement serial communications with a camera in order to control its pedestal (movable base) as well as set a few dozen other camera options. The catch is that I ...
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6answers
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Low power computer for stereo vision

I would like to build a motorized robot with stereo vision that sends visual input to a PC over wifi for processing. A Raspberry Pi would have been perfect for the task if it would be possible to ...
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1answer
495 views

Mobile Camera Calibration and rectification frame rate

I've been searching the internet for an answer to this question, but I haven't come across anything that will help me. Basically, we have a Meka Humanoid Robot in our lab, which has a shell head in ...
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2answers
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Interfacing high-resolution image sensors with ARM Board [closed]

I'm working on a project requiring HD (Stereo) Video Processing. Most of High Resolution (5MP+) Sensors use MIPI-CSI interface. I managed to get a board with an Exynos5 SoC. The SoC Itself has 2 ...
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3answers
591 views

Connect to video stream with Java app instead of console and mplayer [closed]

I'm building a quadcopter using Raspberry Pi. There is the Pi Camera connected to the Raspberry Pi which is streaming the captured video. I can connect to this stream via Wi-Fi on my notebook (Linux) ...
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1answer
171 views

Good 3D simulator for outdoor autonomous navigation

What's an appropriate tool for simulating a car driving in a simple closed-loop racetrack? I'm trying to implement the control logic for an autonomous vehicle, and I'd like to be able to first ...
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1answer
86 views

Joint angle correction using LM

I have a camera mounted on a rotational joint. I need to calibrate the extrinsics of this camera. I can fix the camera at an estimated angle (facing the ceiling). Then I want to get the real angle. ...
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7answers
6k views

What are some low cost alternatives for lidar? [closed]

It need not be as effective as lidar or it may have some disadvantages when compared with lidar. What are the probable alternatives? Edit: I'm intending to use it outdoors for navigation of ...
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1answer
47 views

which type of camera should be used for detecting road lanes for good processing in matlab [closed]

What are the parameters which should be selected to choose camera for lane detection system.What parameters should be kept in mind (like picture quality,frame rate,cost e.t.c). Which camera will suit ...
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1answer
1k views

Calculate object distance with camera

Firstly I'm unsure whether this question belongs here or on another SE site (but I'll wing it for now). I've recently been given the job of connecting up a 'smart camera' to a setup where a robotic ...
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2answers
502 views

Suggestions for stepper motor controllers [closed]

I am working on a project where a dslr camera will be rotated on a tripod on 2 axes. I'm definitely using nema 17 motors as those are what I have. The motors will rotate 30 degrees every 5 seconds in ...
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1answer
84 views

What different sensing approaches are used in the current batch of indoor 3D cameras?

I'm aware of the PrimeSense camera powering the Kinect. Are more advanced sensor types available now in the < $500 range? For example, has there been any sort of game-changer in structured light ...
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1answer
16k views

How can I interface my CMOS camera module to an Arduino? [closed]

I am totally new to the camera interface and usage in an Embedded project, and would like to use a CMOS vision sensor like this.This project further will be used to power a small robot with on-board ...
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1answer
5k views

Transform Image Using Roll-Pitch-Yaw Angles (image rectification)

UPDATE: This exact problem has been solved in StackOverflow. Please read this post there for further explanation and a working solution. Thanks! I am working on an application where I need to rectify ...
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1answer
500 views

Are time-of-flight cameras like the swissranger affected by outdoor fog?

I'm looking to build an outdoor robot and I need to know if time-of-flight cameras like the SwissRanger™ SR4500 work in fog, does anybody have some experiences on that?
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2answers
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Need suggestions for object recognition

I am tasked with creating a system that will recognize fish pulled out of a lake. The system should be able to identify the type of species of fish. Typically, I turn to Arduino for projects like this....
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4answers
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Stabilizing a quadcopter with optical flow

My quad copter can balance itself in the air using data collected from mpu6050. With the sonar sensor, it can hover at a specific height, but it moves on the horizontal plane in a random direction. ...
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1answer
4k views

Build an WiFi IP camera with webcam [closed]

I have a USB webcam and a WiFi module which it can convert Serial data to WiFi and vice versa. The question is can I simply convert the data coming from the webcam to serial with a USB to Serial IC (...