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2020-03-27 14:33:45 -0500 commented question Disparity Map to Point Cloud gone wrong

You might try googling for 'opencv stereo depth to point cloud example' and reading thru example code to look for incons

2020-03-27 14:22:59 -0500 commented question Disparity Map to Point Cloud gone wrong

The output of the stereo disparity computation is a 2D Mat of 16-bit signed values corresponding to the first input arra

2020-03-20 13:01:14 -0500 answered a question Increasing depth accuracy with more than two cameras

I have a partial answer: 1) You may have two different applications of stereo matching here. You may need to filter the

2020-03-20 12:35:26 -0500 edited answer How can we see the non-texture surfaces on the depth map?

I suppose you have noted a lack of depth solution in low-contrast areas of your object. Some ideas for adding unique reg

2020-03-20 12:33:02 -0500 edited answer How can we see the non-texture surfaces on the depth map?

I suppose you have noted a lack of depth solution in low-contrast areas of your object. Some ideas for adding unique reg

2020-03-20 12:26:00 -0500 answered a question How can we see the non-texture surfaces on the depth map?

I suppose you have noted a lack of solution in low-contrast areas of your object. Some ideas for adding unique registrat

2020-03-05 16:21:00 -0500 commented answer Big different between StereoSGBM and gpu::StereoBM_GPU

Hollows are areas where the disparity was not able to be determined. It can be due to lack of distinguishable physical f

2020-02-06 13:38:58 -0500 answered a question [stereo calibration] intrinsic parameters estimation at different resolutions

From Camera Calibration and 3D Reconstruction, in the Detailed Description section, you'll see that calibration fills in

2020-01-16 23:10:35 -0500 received badge  Notable Question (source)
2019-12-19 14:09:07 -0500 commented question Calculating depth with Ptr<StereoSGBM>, black bar on image

Note that compute returns a 2d array with 16-bit fixed point disparity values, with the least significant 4 bits the fra

2019-12-19 14:08:30 -0500 commented question Calculating depth with Ptr<StereoSGBM>, black bar on image

Note that compute returns a 2d array with 16-bit fixed point disparity values, with the least significant 4 bits the fra

2019-12-12 18:01:13 -0500 commented question Calculating depth with Ptr<StereoSGBM>, black bar on image

The SGBM API can provide you a table relating disparity values to depths (presuming your cameras are calibrated correctl

2019-12-04 06:30:57 -0500 received badge  Nice Answer (source)
2019-11-27 19:20:43 -0500 commented answer Rotating Camera Intrinsics Matrix

If it's the correct answer, please check the checkmark so it can be closed as solved! :-) Thank you.

2019-11-21 14:58:07 -0500 commented answer Rotating Camera Intrinsics Matrix

See edit to answer for details.

2019-11-21 14:57:57 -0500 edited answer Rotating Camera Intrinsics Matrix

Generally, you can rotate a portrait image into landscape or vice versa (remap pixels) prior to feeding it to the calibr

2019-11-21 14:38:28 -0500 commented answer Rotating Camera Intrinsics Matrix

To the point, I'd merely exchange fx and fy, for pi/2 and 3pi/2 rotations, and leave them as is for 0 and pi rotations.

2019-11-21 14:27:12 -0500 commented answer Rotating Camera Intrinsics Matrix

To the point, I'd merely exchange fx and fy, cx and cy for pi/2 and 3pi/2 rotations, and leave them as is for 0 and pi r

2019-11-21 14:24:44 -0500 commented answer Rotating Camera Intrinsics Matrix

I have a question: does the camera switch between portrait mode and landscape on its own, and then you feed the resultin

2019-11-20 14:52:43 -0500 answered a question Rotating Camera Intrinsics Matrix

Generally, you can rotate a portrait image into landscape or vice versa (remap pixels) prior to feeding it to the calibr

2019-09-09 11:53:54 -0500 received badge  Good Question (source)
2019-08-28 19:00:05 -0500 commented question How to make the disparity map filter not adapting?

You may want to compare output at each step in the chain - capture of initial images, result of disparity, result of WLS

2019-08-12 13:21:56 -0500 commented answer How to calculate surface roughness in disparity map?

I will go ahead and mark it correct for you then. Thanks for contributing a good question, discussion, and answering it

2019-08-09 15:00:09 -0500 commented answer How to calculate surface roughness in disparity map?

Oh, if you are satisfied with your own answer, you can mark it correct too, more karma points. :)

2019-08-09 14:47:04 -0500 commented answer How to calculate surface roughness in disparity map?

Thanks for posting your answer. So, the SVM decides "this histogram looks like the histogram from other faces, and not l

2019-08-07 13:35:06 -0500 edited question Wrong result in calibrateHandEye function [answered]

Wrong result in calibrateHandEye function I am working in a robot application, in which I have a camera fixed to a robot

2019-08-07 13:32:25 -0500 commented question How to calculate surface roughness in disparity map?

Prostoi, I am sorry, this is an application area (not an opencv operational question). It's also not an area where I hav

2019-08-07 13:31:56 -0500 commented question How to calculate surface roughness in disparity map?

Prostoi, I am sorry, this is an application area (not an opencv operational question). It's also not an area where I hav

2019-08-06 20:47:14 -0500 commented question How to calculate surface roughness in disparity map?

You could try making a normalized histogram of depths over the whole image, or if you can somehow identify a face region

2019-08-06 20:46:00 -0500 commented question How to calculate surface roughness in disparity map?

You could try making a normalized histogram of depths over the whole image, or if you can somehow identify a face region

2019-08-02 19:07:27 -0500 answered a question How to provide flag arguments in pthon cv2 module function

See Python API for cv2.findChessboardCorners using google. You'll get to OpenCV: Camera Calibration and Reconstruction.

2019-07-31 16:16:50 -0500 commented answer Inconsistent Disparity Map Coloration Between Frames.

@JackInaBox thank you for the correct answer vote! Your ideas sound worth trying. I haven't used outlines to solve dis

2019-07-29 15:05:35 -0500 commented answer Inconsistent Disparity Map Coloration Between Frames.

@JackInaBox this is a good discussion. If your real subject is just the scene as pictured, you will have errors. - Perh

2019-07-29 15:04:37 -0500 commented answer Inconsistent Disparity Map Coloration Between Frames.

@JackInaBox this is a good discussion. If your real subject is just the scene as pictured, you will have errors. - Perh

2019-07-29 14:54:26 -0500 commented question Minimum distance my setup can detect

The StereoSGBM algorithm (and to a lesser degree, StereoBM) is optimized to find common visual elements of locally flat

2019-07-29 14:44:20 -0500 commented question Minimum distance my setup can detect

Experimentation is ALWAYS worth doing. There is little alternative to learning by doing, because this is a complex field

2019-07-24 18:47:41 -0500 commented question Minimum distance my setup can detect

This should be easy for you to determine empirically (by trying it). From a mathematical perspective, what are your sett

2019-07-22 21:02:19 -0500 received badge  Nice Answer (source)
2019-07-22 14:09:21 -0500 edited answer Inconsistent Disparity Map Coloration Between Frames.

You are seeing calculated depths, which, frame to frame, are calculated as very different disparities from your stereo c

2019-07-22 13:59:37 -0500 answered a question Inconsistent Disparity Map Coloration Between Frames.

You are seeing calculated depths, which, frame to frame, are calculated as very different disparities from your stereo c

2019-05-29 19:37:26 -0500 commented question Python 3.6.5 + Opencv 3.4 imshow function

I think you'll find imread did not read an image in, did not print any errors, and so an image with width and height of

2019-05-24 21:44:19 -0500 received badge  Necromancer (source)
2019-05-22 18:24:01 -0500 commented answer Stereo SGBM Algorithm

Are these the left and right images which have been undistorted and rectified? Because that is what you need as input to

2019-05-20 17:24:45 -0500 edited answer Stereo SGBM Algorithm

Calibration: Accurately calibrate your cameras (intrinsic and stereo extrinsics). Minimize noise: Stereo disparity algo

2019-05-20 17:23:55 -0500 edited answer Stereo SGBM Algorithm

Calibration: Accurately calibrate your cameras (intrinsic and stereo extrinsics). Minimize noise: Stereo disparity algo

2019-05-20 17:22:21 -0500 answered a question Stereo SGBM Algorithm

Calibration: Accurately calibrate your cameras (intrinsic and stereo extrinsics). Minimize noise: Stereo disparity algo

2019-04-25 20:54:52 -0500 received badge  Popular Question (source)
2019-04-17 13:27:22 -0500 commented question problem with stereoRectify() results [magnified output]

The stretching along the Y axis makes me think your calibration might have misdetected values stored in a K matrix (fx,

2019-03-26 04:52:28 -0500 commented question imwrite write on usb drive

Does img contain data in a 3 channel color format? If not, you'll need to convert the color format Does img_counter hav

2019-03-26 04:51:37 -0500 commented question imwrite write on usb drive

Does img contain data in a 3 channel color format? If not, you'll need to convert the color format Does img_counter ha