FindContour | 直接使用opencv findContours 和 minAreaRect 方法从分割结果获取box

by Tianxiaomo Python Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | FindContour Summary

FindContour is a Python library. FindContour has no bugs, it has no vulnerabilities and it has low support. However FindContour build file is not available. You can download it from GitHub.

直接使用opencv findContours 和 minAreaRect 方法从分割结果获取box.

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Security

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Support

FindContour has a low active ecosystem.

It has 6 star(s) with 0 fork(s). There are no watchers for this library.

It had no major release in the last 6 months.

FindContour has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of FindContour is current.

Quality

FindContour has 0 bugs and 11 code smells.

Security

FindContour has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

FindContour code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

FindContour does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

FindContour releases are not available. You will need to build from source code and install.

FindContour has no build file. You will be need to create the build yourself to build the component from source.

It has 129 lines of code, 4 functions and 1 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed FindContour and discovered the below as its top functions. This is intended to give you an instant insight into FindContour implemented functionality, and help decide if they suit your requirements.

r Find the contour of the image
Rotate a bounding box .
Fits a line .
Compute the PCA line .

Get all kandi verified functions for this library.

FindContour Key Features

No Key Features are available at this moment for FindContour.

FindContour Examples and Code Snippets

No Code Snippets are available at this moment for FindContour.

Community Discussions

Trending Discussions on FindContour

Detecting squares in a chessboard OpenCV

Find maximum inscribed circle in a non convex hull

How to Accurate result on cv2.findcontours to find objects in BW/black-white image?

How to find contours in dotted text captcha image

Convert image contours to polar coordinates

How to compare two point of two objects

opencv: how to merge near contours to get the one big outest contour?

Getting cleaner blobs for counting

Filter pixel based on multiple conditions

Remove text at edges using opencv python

QUESTION

Detecting squares in a chessboard OpenCV

Asked 2022-Apr-15 at 07:30

I detected a chessboard using OpenCV in python using:

Computing the edge of the image
Computing the Hough transform
Finding the local maxima of Hough transform
Extracting the image lines

Then I used findContours and drawContours functions:

...

ANSWER

Answered 2022-Apr-15 at 07:30

An approach is to use contour area filtering + shape approximation. Since a square has 4 corners, we can assume a contour is a square if it has four vertices.

Detected squares in green

Isolated squares

Source https://stackoverflow.com/questions/71879515

QUESTION

Find maximum inscribed circle in a non convex hull

Asked 2022-Apr-11 at 13:31

By "non convex hull" I mean something like

the black portion of the image (my apologies if this is not "non convex hull", I do not have a better word to describe it).

What I am trying to get is a maximum inscribed circle within the black portion, like the red circle below.

In other words, I would like to know the circle in a vacant space. Is this possible using opencv? When I try to get the circle using the following code

...

ANSWER

Answered 2022-Apr-11 at 13:31

There’s some cases of occurring it:

case 1: set the variable center wrongly ;-;

case 2: because of cv2 coords ( 0, 0 ) is the top left of the screen, so that if center is correct, then make sure that you’ve made the the cv2 screen as your screen size, else that happens

Source https://stackoverflow.com/questions/71814317

QUESTION

How to Accurate result on cv2.findcontours to find objects in BW/black-white image?

Asked 2022-Mar-18 at 10:04

This is a perfect sample image that includes range of black objects.

And this code suppose to find every black plants

...

ANSWER

Answered 2022-Mar-18 at 10:04

We may use dilate instead of GaussianBlur, use RETR_EXTERNAL instead of RETR_TREE, and keep only the large contours.

Inverse the threshold:

Source https://stackoverflow.com/questions/71524593

QUESTION

How to find contours in dotted text captcha image

Asked 2022-Feb-28 at 09:23

I am newbie to OpenCV. I'm trying to find the contours of the captcha image. It does not work only when my captcha image contains the dotted text.

I have done following code for that:

...

ANSWER

Answered 2022-Feb-28 at 09:23

Here is my code and output

Source https://stackoverflow.com/questions/71261999

QUESTION

Convert image contours to polar coordinates

Asked 2022-Feb-19 at 19:39

I'm trying to categorize the type of jigsaw puzzle pieces (number of heads, if it is a border or a corner...) by analyzing their contours.

The approach I'm trying to follow is analyzing this type of plot (from this paper) that "unwinds" the cartesian coordinates of the contours of the puzzle piece by converting it to polar coordinates; however I'm not able to replicate it.

I've tried with:

...

ANSWER

Answered 2022-Feb-19 at 17:31

Find the center of the tile:

Source https://stackoverflow.com/questions/71179831

QUESTION

How to compare two point of two objects

Asked 2022-Feb-02 at 12:05

My purpose is to check whether these cubes are in one column or not. Having problem with detecting objects properly. not sure why numbers are placed there like that. My main questions:

How to compare two point of two objects to check if they are fit well or not?
How can I improve detecting objects?

Thanks in advance.

...

ANSWER

Answered 2022-Feb-02 at 12:05

Since the boxes are touching each other, watershed algorithm works well in this cases to extract the box contours. Then the x coordinates position of the rectangle contours can be used to say whether they are aligned or not.

Steps:

Watershed algorithm to get markers.
Filter out boxes(rectangles)
To see if its aligned or not using standard deviation of all the boxes x coordinates. (the threshold can be set accordingly)

Code:

Source https://stackoverflow.com/questions/70929010

QUESTION

opencv: how to merge near contours to get the one big outest contour?

Asked 2021-Dec-04 at 02:11

I am trying to digitize the kid's drawing into SVG or transparent png file format so that they can be used in Scratch. The white paper should be replaced by transparent background and all the drawing part should be preserved.

My plan is to get the outest contour of the drawing and generate a mask, then use the mask to get the drawing part without paper background.

The problem is the drawing may not consecutive which means there may have some small holes leading to break the entire drawing contour to many many small contours.

Now I want to concatenate the near outest contours to form a big outest contour for masking.

The original drawing and the processed result is attached.

Code:

...

ANSWER

Answered 2021-Dec-04 at 02:08

import cv2, numpy as np

# Read Image
img = cv2.imread('/home/stephen/Desktop/test_img.png')
img  =cv2.resize(img, (750,1000))

Source https://stackoverflow.com/questions/70222415

QUESTION

Getting cleaner blobs for counting

Asked 2021-Nov-12 at 01:19

still on my journey of learning image masking.

Im trying to count the number of red dots in an image.

Here is the input image

After masking red, I get this image

The problem is, some of the blobs aren't full, so it does not count all the blobs, for example in this specific image, it does not count number 6 and 9. (assuming top left is 1)

How do I refine the masking process to get a more accurate blob?

Masking Code:

...

ANSWER

Answered 2021-Nov-10 at 15:37

Since you're looking for bright enough reds, you might have a better time masking things in HSV space:

Source https://stackoverflow.com/questions/69914993

QUESTION

Filter pixel based on multiple conditions

Asked 2021-Oct-16 at 03:57

I have a piece of code as bellow:

...

ANSWER

Answered 2021-Oct-16 at 03:57

A great way is (adapted from Cris Luengo's comment)

Source https://stackoverflow.com/questions/69592095

QUESTION

Remove text at edges using opencv python

Asked 2021-Sep-23 at 09:39

I want to remove the text at the edges and draw a bounding box around the center text, I have written the following code but it does not work

Input image

Output should be like this with bounding box

...

ANSWER

Answered 2021-Sep-23 at 09:39

Assume we know how to remove the text at the bottom edge, we can rotate the image by 90 degrees, and remove the text at the top edge - rotate and remove 4 times.

Removing the text at the bottom edge:

Dilating:
There is no need to apply GaussianBlur, and no need for opening.
We may simply dilate with horizontal line shaped kernel:

Source https://stackoverflow.com/questions/69295145

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install FindContour

You can download it from GitHub.
You can use FindContour like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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