All Questions
Tagged with python computer-vision
5,509
questions
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Remove all text from the document, leaving only the template
I have a document in the form of an image. The content of the document is some information in the form of a table. Most often, these are some scanned documents, that is, black and white. However, ...
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Error "For non-planar calibration rigs the initial intrinsic matrix must be specified in function 'cvCalibrateCamera2Internal'"
The full trace of the error I'm encountering:
in stereo_calibrate
ret, cameraMatrix1, distCoeffs1, cameraMatrix2, distCoeffs2, R, T, E, F, perViewErrors, _, _= cv2.stereoCalibrateExtended(
cv2.error: ...
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How do I track a contour from my previous image?
So I have a video of bacterial cells moving around which I converted to frames. Now I want to find the instantaneous velocity of each bacterial cells. For this I am interested in finding by how much a ...
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-3
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How to measure the width and angle of two intersecting ropes using OpenCV? [closed]
The first picture below is the original image, showing a net. The ropes in the net are of two types: thick and thin. It is necessary to distinguish which are thick ropes and which are thin ropes ...
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29
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Improvement of CV2 shape detection for spot detection on TLC
In my work, I use TLC which give me object like the one on this picture. It is a piece of paper with spot on it at a precise height.
I need to detect the plate itself and it measurments.
Then I need ...
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23
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Error with OpenCV cv2.minEnclosingTriangle [closed]
my program generates 2D contours using scipy.spatial ConvexHull. I get the same error for any hull
Example
ph=array([[0.16416803, 0.20534728],
[0.54442649, 0.18041865],
[0.94021202, ...
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How to train Yolo 3D for NYU dataset
I have had trained my Yolo 3D model in KITTI dataset and now I would like to train it on NYU dataset. What changes must I do in the NYU dataset in order to train it in YOLO 3D model?
I would like to ...
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-2
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1
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32
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Which are the most efficient models for shape detection in an image? [closed]
I want to create a Python algorithm that detects objects appearing and disappearing between 2 photos. Thos photos are not taken exactly from the same spot. My idea is to use a pretrained model that ...
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20
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Color Mismatch and Depth Inconsistency in Point Cloud to RGB Image Conversion Using Open3D
I am working with Open3D to convert point cloud data into an RGB image. However, I'm encountering issues where the colors in the output image do not match those in the input point cloud. Additionally, ...
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53
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Calculate the inner contour of a computed tomography
I'm working on a project to calculate the level of a chest deformity.
For that, I need to find the inner contour of the chest from the tomography; however, I don't know how to select the inner contour....
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28
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Invert undistortion done in OpenCV (recover the original image)
I have an application where I use a 3D model developed through photogrammetry to map between a 2D -> 3D space and back (3D -> 2D). The photogrammetry software (reality capture) "undistorts&...
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20
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How do I compare two big Temperature-Matrix-Datasets and classify the difference/similarities? How do I proceed finding a good method? [closed]
I have the following issue: I want to compare thermal pictures (data is present as a big Matrix/ each Pixel one value) in python and understand weather they are different. What statistical approaches ...
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65
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How to add horizontal lines to the table in image opencv
I want to add horizontal lines to the below image
resultant output should be like:
Any methods on how to work it out, even if there are diff images which don't have horizontal lines.
I've tried ...
- 19
-2
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1
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67
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Trouble detecting/removing two watermarks that vary location across image dataset
I have a problem with removing watermarks from a collection of images. The watermarks appear near each other but are different (see below). One watermark is a red square and has white text inside of ...
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52
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Using fisheye calibration to solve allsky images using OpenCV (fails)
I am using fisheye calibration to solve chessboard images using OpenCV. It fails for the calibration flag cv2.fisheye.CALIB_RECOMPUTE_EXTRINSIC, so I work around it. But once I get the parameters, the ...
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