There a couple of different ways to go about this. You can monkey-patch ax.format_coord, similar to this official example. I’m going to use a slightly more “pythonic” approach here that doesn’t rely on global variables. (Note that I’m assuming no extent kwarg was specified, similar to the matplotlib example. To be fully general, you need … Read more
For axis-aligned bounding boxes it is relatively simple. “Axis-aligned” means that the bounding box isn’t rotated; or in other words that the boxes lines are parallel to the axes. Here’s how to calculate the IoU of two axis-aligned bounding boxes. def get_iou(bb1, bb2): “”” Calculate the Intersection over Union (IoU) of two bounding boxes. Parameters … Read more
The following code should get you started. You may want to play around with the parameters at the top of the program to fine-tune your extraction: import cv2 import numpy as np #== Parameters ======================================================================= BLUR = 21 CANNY_THRESH_1 = 10 CANNY_THRESH_2 = 200 MASK_DILATE_ITER = 10 MASK_ERODE_ITER = 10 MASK_COLOR = (0.0,0.0,1.0) # In … Read more
How to fix the error There are two potential causes for this error to happen: The file name is misspelled. The image file is not in the current working directory. To fix this issue you should make sure the filename is correctly spelled (do case sensitive check just in case) and the image file is … Read more
There a couple of different ways to go about this. You can monkey-patch ax.format_coord, similar to this official example. I’m going to use a slightly more “pythonic” approach here that doesn’t rely on global variables. (Note that I’m assuming no extent kwarg was specified, similar to the matplotlib example. To be fully general, you need … Read more
From your input image, you need to make text as white, and background as black You need then to compute the rotation angle of your bill. A simple approach is to find the minAreaRect of all white points (findNonZero), and you get: Then you can rotate your bill, so that text is horizontal: Now you … Read more
Here’s a modified implementation of the Projection Profile Method to correct skewed images as described in Projection profile based skew estimation algorithm for JBIG compressed images. After obtaining a binary image, the idea is to rotate the image at various angles and generate a histogram of pixels in each iteration. To determine the skew angle, … Read more