imread | Read images to numpy arrays | Computer Vision library
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kandi X-RAY | imread Summary
Read images to numpy arrays
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QUESTION
While studying OpenCV, I realized that whenever I blend two images the colors of scr2 have changed in some way(depends on the colors of scr1).
I know this is not an informative and clear way to explain my issue, however; I don't know how to describe this issue since I have no expertise with colors so I would like to show you what I meant with images and code.
The input image: Input image
...ANSWER
Answered 2021-Jun-15 at 16:46I think I misunderstood your issue. If your issue is that the image where you do not have lines has changed, then that is because you used a white background for scr2. The white then mixes with your image in the output. Make it scr2=img.copy() in place of what you have now. Then try your code. So in Python/OpenCV as a demonstration, using the Lena image as background, here is your code:
QUESTION
I need to split text on image into lines and then save every line as new img.
I understand how to split in lines, but how i can save all lines as img?
there is my code:
...ANSWER
Answered 2021-Jun-15 at 18:39This is one way to do it:
QUESTION
I want to create a PNG image file with palette information in Python using Pillow and/or pypng.
The input is:
Palette information
...
ANSWER
Answered 2021-Jun-14 at 09:38Here's some demonstration code to convert an existing RGB image to some indexed color image. Please keep in mind, that Pillow only allows storing 256 different colors in some color palette, cf. Image.putpalette
. So, make sure to have your input images not containing more than 256 different colors.
Also, I will assume, that the palette is known before, and that all colors in the existing RGB image are exclusively from that palette. Otherwise, you'd need to add code for extracting all colors, and setting up a proper palette beforehand.
QUESTION
I'm using the OpenCV function findChessboardCorners()
successfully, but I'm confused by the shape of the corners
return value.
Here is my code below. I already know that my chessboard image has 8 x 6 internal corners.
...ANSWER
Answered 2021-Jun-14 at 06:34It is an unwanted and unnecessary dimension, you can eliminate the dimension by using the squeeze function of numpy
:
QUESTION
I tried the following code:
...ANSWER
Answered 2021-Jun-14 at 06:13There is a simple mistake, you are doing. You defined your trackbar name in here as "Blur":
QUESTION
Today I learned a new API, but met a trouble. What's the return value of .max()?
I haven't seen this function until today, can anyone could tell me something?
...ANSWER
Answered 2021-Jun-14 at 04:52Here's an example with code. Suppose we use this very basic image. It is a 3 x 3
BGR
matrix. The first element (pixel), from top left to bottom right, is pure green, so its value in BGR
format is: [0, 255, 0]
. The fifth element is a kind of dark red, but not pure. Its BGR
value is [0, 0, 200]
. The last element is a very dark blue, with value [150, 0, 0]
. So we have nice colors in the diagonal while all remaining pixels are black, with a value of [0, 0, 0]
. You can see it in this (enlarged for displaying purposes) image:
Let's read it and print its maximum value:
QUESTION
I am working on a python program that reads license plates from trucks. An image that gets processed by this program and filters the characters as output. Here is the input of the image in the program:
...ANSWER
Answered 2021-Jun-13 at 13:31You can capture a single frame by using the VideoCapture method of OpenCV.
QUESTION
ANSWER
Answered 2021-Jun-13 at 11:17You can simply index with the rectangle to copy the original pixels values into the new image:
QUESTION
Trying to recolor the hair using a mask. Firstly segmented hair from the main image & trying to make it a realistic one changing HSV value but according to my code the result is not the accurate output that i am looking for. Any solution?
...ANSWER
Answered 2021-Jun-13 at 03:03I have done a simple program for your project
first I used this code to get a mask https://docs.opencv.org/3.4/da/d97/tutorial_threshold_inRange.html . This code uses inRange function.
after that I used the following code to get the results
QUESTION
I'm a newbie to Flutter and trying to build a Flutter App.
I want to upload an image from android device to django, process it and send the results back to flutter in a json format without saving the image anywhere. But I'm facing difficulty in reading image in django. However, the image is sent successfully from flutter.
Here is my flutter code for sending an image using Dio :
...ANSWER
Answered 2021-Jun-12 at 20:11cv2.imread() expects a file path
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