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Tag: image-processing
I’m not able to get the correct homography points
I’m trying to create homography matrix from this field: (source image with ids:) To the destination image: The points for the source points are: And the points for destination points (new image): I tried to create homography matrix with the following code: And I got the following homography matrix: I tried to check if the homography matrix is correct, so
Scikit Image load binary image and convert to binary matrix
I have created a numpy array shape(11 x 11) with all pixels 0 excluding one column filled with 1. The array was saved as a png image using matplotlib.imsave yielding the expected image – black background with a white line in the middle. When trying to reimport the saved png image skipy.imread and Pil.Image.Open yield an array of the form
Python, crop an image to extract a single side of it
I have an image and the vertexs of each sides of it, meaning that, if we see each side as a segment (A,B) i have both the A and B point coordinates. Now i would like to crop the image so that i have only one segment of the image (which is the side), for example That’s just one side
xticks and yticks issues while using imshow
I’ve a problem with fixing the xticks and yticks for the imshow plot. When I use the single plot for imshow then the extent works better (see first figure below). However, when I use to insert the coordinates of the local maxima on the imshow plot then the ticks have changed (second figure). Can anybody help me to fix the
Find end point on each line using OpenCV
I’m trying to get the coordinate of every end point on every line, but i couldn’t come up with a solution, this is what I’ve currently got but its finding the outline of the lines not the lines itself Answer The hit-or-miss transform can be used to find end points of a line after skeletonization. Code:
Is there any way to detect edge in this situation?
I try to detect edge using python. There are hundreds of algorithms for edge detection, however, the image is very obscure and unclear. The most serious problem is one edge is located at the local maximum value, but the other edge is located slightly shifted from local maximum value. Through the detailed examination, I found the other edge is located
Combining various image channels after gaussian filtering produces white image
I am trying to implement a gaussian filter for an image with dimensions (256, 320, 4). I first generated a gaussian Kernel for the same and then individually perform the convolution on each of the 4 channel, i.e on all the 256*320 greyscale images. After performing this I wish to combine the image into a coloured image. However, when I
How to add a row of pixels at the bottom and to the right of an image?
So Im experiencing an issue with a framework that Im working with, where the images sort of get translated by 1 pixel downwards and one pixel to the left (making the pixel data wrong). To counteract this I would like to add a one pixel “padding” then at the bottom & to the left. The script needs to be relatively
What is the correct approach to display the Image size in Python?
Using the idea from this code for changing image size dynamically in a loop, there’s bit of a problem here. There are a couple of methods to get the image size in bytes only one gives the accurate results but that requires file to be saved in the disk. If I save the disk every time and read it again,