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Questions tagged [calibration]

Use this tag for questions related to the process of adjusting the output or indication on a measurement instrument.

443 questions
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Calculating yaw angle without calibration

Suppose we have accelerometer and magnetometer. I'm wondering if there is an approach to calculate yaw angle without calibrating magnetometer if - Yaw angle relative to the magnetic north is not required to be accurate; so when the device pointing…
Ted Cheng
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Camera Calibration - Results Sufficient?

I´m doing my camera calibration using the Caltech Toolbox http://www.vision.caltech.edu/bouguetj/calib_doc/htmls/example.html and I´m not quite sure about the quality of my results. I had around 40 images in the beginning and dropped around 10…
Martin1988a
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Turn off compass calibration in iOS app

My app requests the user's location (which I don't think I need), but it almost ALWAYS asks the user to calibrate (which is very annoying). I have seen this on here: locationManagerShouldDisplayHeadingCalibration which states setting this to Yes…
ygmedia
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Can one set distributions to give only the distribution mean while calibrating a model?

I am trying to calibrate parameters in a probabilistic cost-effective model I built. The model is a discrete state-transition (Markov) model. Before building models in R, I used the software TreeAge Pro. There one could set the model to run using…
user3738925
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tslib tools don't draw anything on the screen

Trying to calibrate touchscreen for Qt apps with tslib on ARM-device. When running ts_calibrate or ts_test, they both work (i.e. return info about touches) and ts_calibrate successfully calibrates touchscreen when touching the screen somewhere…
netnazgul
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Matlab Camera Calibration Toolbox: go_calib_optim error

When I run go_calib_optim on the calibration data I get: Error using - Matrix dimensions must agree. Error in compute_extrinsic_init (line 66) Y = X_kk - (X_mean*ones(1,Np)); Error in comp_ext_calib (line 22) [omckk,Tckk] =…
Booley
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Xtion Vertical position usage ( calibration ) with Skeleton

I am currently working on the "Xtion pro live" by using "OpenNI" library. The problem is that the Xtion must be vertically placed (along a wall). The problem is that in this position the user calibration always fails, so it is impossible to get the…
user3730408
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Game map calibration using java

The goal is to calibrate the game map to a certain point where everything on the map is expected using the Robot class in java to drag and pull the map. I'll show you an example…
Tony Stark
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How to get display Color Temperature via C#?

Does anyone have idea how to get or set display color temperature via C#? I found Monitor Configuration Functions on Microsoft Dev Center, but it looks like for C++. And there is no sample code of these functions. Can anyone give me idea to call…
Rex Hsu
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OpenCv cvRemap with variable image "subregion"

I have an application which uses cameras that have an "aoi" feature. Similar to openCv's ROI function, the cameras allow specification of rectangular subset (call it "subregion") of the total sensor image to be acquired. Using the aoi feature in…
Dave Thomas
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Using camera calibration parameters in a real-time video capture application

So, I am capturing a video from a cheap usb web-cam. I then compute optic flow from this feed. I am finally using these optic-flow measurements for (monocular) robot navigation. I have calibrated my camera and have the intrinsic and distortion…
avi.ks
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Interpreting Camera Calibration Matrix

I'm having a problem interpreting the camera calibration data found at http://www.cvg.reading.ac.uk/PETS2001/pets2001-cameracalib.html#dataset2 and was wondering whether anyone can help. Basically I understood the example and I it works correctly…
kenneth
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OpenCV camera calibration using partial-frame images

I'm using an industrial camera which is capable of grabbing images with 2592x1944 pixels. To improve image processing speed, I'm setting an smaller AOI(area/region of interest), for example, a region of 2200x1400 pixel starting at 100,100, please…
wdx04
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In ETAS INCA, is there a way to quickly retrieve an item from an arbitrary path in an ASAP2Project?

I'm trying to connect to INCA through the .NET API in order to navigate the folder structure of an ASAP2 project. Specifically, I want to get an object that represents the "Target" folder that I've highlighted below. This is proving pretty…
ThoughtProcess
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How to compute ext and int parameter from camera projection matrix

I have been learning about camera calibration and get confused in my way to understand how to recover extrinsic and intrinsic camera parameter from camera projection matrix. In general, we can derive camera projection matrix values by solving the…
deduu
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