All Questions
28,885
questions
0
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18
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Change color background of chat screenshot with multicoloured background
I have a screenshot taken from a chat platform and want to change the background of the chat to white, including profile pictures of participants. The code from this Question works fine if the name of ...
- 383
0
votes
0
answers
32
views
How to identify the similarity(in %) between 2 "Black & White" only images / similarity between shapes ignoring colors?
I've searched all possible related keywords that I can think of, but the results are not really what I'm looking for, as most algorithm I found puts high concern on COLOR.
The idea of my application ...
0
votes
0
answers
29
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Why is OpenCV's matrix addition function not clipping when I add a uint8 variable with a value of 200 to a uint8 variable with a value of 100? [duplicate]
I am working my way through PyImageUniversity and am familiarizing myself with matrix addition and subtraction in Python using NumPy and the OpenCV library.
I have Python 3.11.4, OpenCV 4.10.0-dev, ...
-1
votes
0
answers
25
views
Find the best convergence point of multiple particules trajectories? [closed]
In my project, I would like to find the best convergence point of trajectories of tracked points (done with cv2.calcOpticalFlowPyrLK...).
I know all the points of each trajectory.
My goal is to find ...
- 318
-3
votes
0
answers
48
views
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
-1
votes
1
answer
39
views
Python - errors when calling cv2.ml.TrainData_create(): - responses data type = 19 is not supported - Expected Ptr<cv::UMat> for argument 'responses'
I am following the following tutorial:
https://www.opencvhelp.org/tutorials/deep-learning/training-models/
Following the instructions using the Caltech-101 dataset, I preprocessed the images (...
- 109
1
vote
0
answers
43
views
How to extract a rectangle in an image from identified lines
I have thousands of images that look like this:
I need to run an OCR algorithm on the "1930 E.D." column. I find that when I crop the image down to just that column, I get much better ...
- 4,436
-5
votes
1
answer
72
views
Conway's GOL rules not implemented correctly [closed]
I am using OpenCV and a kernel to count neighbors of each pixel, the pixel's value then becomes the number of neighbors that it has, and then I apply Conway's rules, but the output is not as expected, ...
4
votes
3
answers
167
views
Compromise between quality and file size, how to save a very detailed image into a file with reasonable size (<1MB)?
I am facing a small (big) problem: I want to generate a high resolution speckle pattern and save it as a file that I can import into a laser engraver. Can be PNG, JPEG, PDF, SVG, or TIFF.
My script ...
- 2,308
0
votes
3
answers
69
views
Extract Shapes from an image with black background
I have a task to bulk extract shapes from an image. The image is with black background and the shapes are with white border.
The main goal is to extract the fruits from the image.
How do you that ...
0
votes
0
answers
40
views
How can I build my Flutter app to use Python for OpenCV and Numpy? [closed]
I'm developing a Flutter app for iOS that requires image processing using Python, specifically with OpenCV and NumPy. I'm facing several challenges and would appreciate guidance on the best approach:
...
0
votes
1
answer
31
views
OpenCV GStreamer VideoWriter write hangs in a Python multiprocessing Process
I'm working on real-time image processing using a Raspberry Pi camera. To optimize processing times, I'm trying to separate some image transformations and video encoding in a separate Process:
import ...
0
votes
0
answers
43
views
OpenCV contours sorting x-axis and y-axis
I am working on a python program to solve a wordsearch. I am using pytesseract and opencv to process an image of the wordsearch and the solution will be displayed as a text. The script processes the ...
- 1
-1
votes
0
answers
63
views
Why is the color of the line black if the BGR Code I have is red?
When running this code the desired outcome is for the line drawn to be red but it is drawing a black line. I am confused since I wrote the BGR code for white but it seems that is it is just working in ...
0
votes
1
answer
63
views
PS Camera taking too much light on OpenCV
I installed a third-party driver and firmware to use my PS 4 Camera on PC and I need it to do a object detection project. Everything works fine on camera on Windows (the screen resolution looks buggy ...
- 5