Questions tagged [camera]
Camera is a device that records and stores images.
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How does camera intrinsic parameters change after undistortion
Here is my goal: I have used OpenCV to estimate a camera's intrinsic parameters and distortion coefficients. In order to avoid having to deal with the camera's distortion going forward, I would like ...
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Estimate bits per pixel from RAW photo
Nowadays many consumer products like smartphones or action cameras support RAW photos. Typically, they spit out a DNG/TIFF file with 16 bit values. However, the actual bit depth of the A/D is rather ...
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How my digital camera creates itself this picture?
here is a picture produced by my digital camera
My camera is an (quite old) Panasonic DMC-FZ200.
My question is : what happened, and at which stage of the process the bug was?
Months ago, while ...
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Python - CV, contour and measurements
I have small problem with cv in Python and rhombus. I can read frame from the camera and create contours...
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Image resolution vs. dimensions
Doing a machine learning computer vision project, and I am a bit unsure of the difference between image resolution and dimensions is, and how I should refer to them in writing. The images in my ...
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Detecting camera raw image saturation/clipping level
I'm looking for a fast but robust algorithm to detect whether a camera raw image has clipped/saturated highlights and, if so, compute the level at which saturation occurs. This saturation/clipping ...
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Why do my set of IR LEDS yield a purple-ish images on one camera sensor and greyscale on another?
I have a set of IR LEDS, and two different cameras. The resulting image from one of them is purple-ish, the other is grayscale when blocking all visible light with a thick plastic bag. Both cameras ...
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calibrating camera using 3d objects such as rubik's cube?
Hello all hope everyone is doing fine.
I have a vision related problem where I want to calibrate my camera using a 3d object such as rubik's cube with known dimensions. I have a cube with 60mm length, ...
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Fixing distortion in photographic reproductions
I am currently building a photographic setup which I intend to use to make reproductions of a large amount of transparencies(positive and negative film strips). As I will be using a fairly small (1&...
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Detecting bullet holes using Python with camera or sensors
I am trying to build a system to detect bullet holes in paper. I've read many StackOverflow threads but not a single one satisfied me. Current methods, which I am using, are good but not perfect and ...
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How is focal length estimated?
There are a number of approaches to calibrate cameras. In this process you estimate the intrinsic parameters using a checkerboard of known size.
I'm confused on how the focal lengths are found. The ...
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Convert pictures from the same camera with different FOV to pictures with same FOV
I have a camera device that produce two pictures at the time:
depth picture with FOV: 87° × 58°
RGB picture with FOV: 90 × 65°
I expect that they "share" the same objective so their origin ...
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Calibration using Camera Calibration Toolbox for Matlab vs OpenCV
I am currently working to calibrate a camera and I tried using both the Caltech Camera Calibration Toolbox for Matlab and OpenCV. I used the same images for both methods. Even if the error seems to ...
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How to remove dark shadows from camera capturing when combining LED spots and ambient light
I'm getting strange moving shadow strips on my camera capture during a computer vision experiment:
As the gif image above shows, those strips move to bottom slowly. I have also noticed that it ...
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Find camera tilt
If I have a camera that captures tilted images what is the way to find the tilt of the camera? Is there a pattern that I can photograph or something similar. I want to reduce the tilt as precisely as ...
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