All Questions

I have a large image file (single band) that do not fit in my ram. I wan to read it as numpy array (data) and plot it using matplotlib, possibly using imshow(data). I know how to do it for a small-...

In Introduction to Applied Linear Algebra – Vectors, Matrices, and Least Squares in page 234 there is an example that will solve the least squares problem to find the lamp powers that result in the ...

I'm doing some image analysis of samples of pseudomona. I'm using k-means clustering to obtain different levels of presence of the bacteria along the sample, as it changes tonality as it increases its ...

My requirement is i need to drag an image to desired location. Based on the link board-drawing code to move an oval the following is the code snapshot i tried. I am not getting any errors its blank. ...

From an image, I have computed a mean value over each column and created a graph. This is the output (without letters and marked points). Most graphs have a behavior like graphs marked with blue, ...

I am doing some image processing in Python. I was originally using PIL to display my image but the output didn't look right to me so I used matplotlib instead and that seems to result in the output I ...

So, I'm writing a function to create a 2d joint histogram of two images in Python. This is the code I have written to produce the histogram. import numpy as np Img1=imread(img1.jpg) Img2=...

I have a questions about the following codes: I want to return 2 values in this function, one is orig_image which is fine, the other one is the cx,cx is the x-coordinate of the center of the biggest ...

I am trying to select non-black pixel and then colour them to black and the black pixels to white. I used a solution provided on Stack Overflow but so far it isn't working for me. import numpy as np ...

I have an RGB image as an ndarray print(img.shape) >>> (64, 64, 3) I want to store a bunch of images into another ndarray: batch = np.empty((64, 64, 3, 2)) batch[...,0] = img Now if I do ...

Here is a simple code which puts a text value onto a black frame and displays it: frame = np.zeros((50,200,3)) org=(0,45) font=cv2.FONT_HERSHEY_SIMPLEX fontScale=1 fontColor=(1,0,0) ##rgb out_img =...

I'm processing a file of images that are in encoded in RGB and contain material. The material is any non-background pixel with the background being purple or RGB(37, 150, 190) At the moment I have 2 ...

I am working on a project for detecting lines using threshold values in HLS image format. I wrote the following code for it. It is not giving any errors but the output I am getting is just a black ...

I'm trying to find all red pixels in a png file and output a binary image file, and I feel like I'm close. I have to use double for loops as it's a requirement for my assignment. this is is what I ...

I was trying to make a filter in python to achieve oil painting effect. It seems that the filter works perfectly, but something went wrong when I was trying to convert RGB array into image. code: from ...