All Questions
3,314
questions
0
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34
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 ...
-1
votes
0
answers
37
views
Improve signature quality extracted using OpenCV from scanned sheet paper
I extracted a signature from a scanned sheet of paper. Users know there should be only the signature on a white sheet of paper.
I implemented the signature cropping from the uploaded image using the ...
- 553
1
vote
0
answers
64
views
How to implement the exposure adjustment like Adobe Lightroom using OpenCV?
I try to create a image editor features like what are provided by Adobe Lightroom with Python and OpenCV. One of them is Exposure Adjustment on the image. The issue I always have is after increase the ...
- 11
1
vote
0
answers
36
views
Remove unwanted areas texts from a binary image
I want to remove the texts and other unwanted small regions(+ - inside the circle) of a binary image for further processing, as shown in the first image,.
For this preprocessing, i tried this code
...
- 11
0
votes
0
answers
38
views
Assign icc color profile to cmyk image using little cms please provide example
how do i apply icc color profile to the cmyk data
profileData,profileLength this contains the icc color profile data
Ihave tried applying using littlecms
void applyICCProfileToCMYK(cv::Mat& ...
0
votes
0
answers
43
views
Directionally closing an image using opencv morphology or otherwise
I'm trying to use opencv morphology to close a binary image. However I would like to close along the maximum intensity direction locally rather than the entire surrounding region. The idea is for me ...
- 1
0
votes
0
answers
70
views
Not able to read 16 bit TIFF file using OpenCV
I am trying to read a 16 bit TIFF image and it is not able to read the file. When I print img it returns NONE.
import cv2
# from tifffile import imread
path = "day-02000.tif"
img = cv2....
1
vote
1
answer
43
views
Change amount of channels / convert OpenCV Mat
So, I'm trying to take a screenshot of my desktop, then import a template image using imread() and use them in a matchTemplate().
My imported template's type is CV_8UC3.
For taking a screenshot and ...
- 11
0
votes
0
answers
33
views
Open CV Image color filter to extract precise area under each color
I have some GPR (ground-penetrating RADAR) data set in .jpg format[Imge attached]. Need to read them and feed them to an Excel sheet. I need each color's rectangle length by pixel value to process the ...
0
votes
1
answer
77
views
Warping an image with a given set of points
I am trying to perform image warping, but I can't seem to apply the transformation matrix given a set of points. Am trying to accomplish is a face morphing given the feature points which in total is ...
- 45
0
votes
1
answer
54
views
How to get world coorditates from image coordinates (z=0)
I my camera captures the area on which the objects are located that is why I do not need "Z" coordinate. I recently have this code. I have 4 objects (qr codes, which are in fixed position) ...
-1
votes
4
answers
125
views
Imwrite OPEN CV method
I have a simple question about OpenCV imwrite method. Which is the difference between doing that:
cv2.imwrite("route", cv2.cvtColor(image*255, cv2.COLOR_RGB2BGR))
and this
cv2.imwrite("...
-5
votes
1
answer
338
views
how to use cv2.imshow()?
Code:
cv2.imshow('E:\Open_CV\opencv\images', img)
error:
error: OpenCV(4.9.0) D:\a\opencv-python\opencv-python\opencv\modules\highgui\src\window.cpp:1272: error: (-2:Unspecified error) The function ...
0
votes
0
answers
38
views
Opencv decode failing for user uploaded images
I am getting the decodedMat object as
Mat [ 00CV_8UC3, isCont=true, isSubmat=false, nativeObj=0x6000005f5800, dataAddr=0x0 ]
for most of the jpeg images which are uploaded by users via camera/gallery. ...
- 3
0
votes
1
answer
119
views
Get black image but i don't know why
The following codes gives me a nearly black image
import fitz
import cv2 #opencv for preprocessing of image
import numpy as np
filename = 'sample_pdf\muscle model\Invoice of muscle model from ...
