Digital Image Processing – Image Filtering
1 main content
A. Select the experimental image for the experiment, complete image reading and display, and add noise to the image; B. Write the filter functions of three image filters; Among them, the general specific implementation steps of mean filtering are: 1. Select a (2n+l) x (2n+l) wind ...
Edge detection is a common method of image segmentation based on gray level mutation. Its essence is to extract the features of discontinuous parts in the image. At present, the common edge detection operators include difference operator, Roberts operator, Sobel operator, Prewitt operator, Log operator and Canny operator.
Posted by robot_nader on Wed, 24 Aug 2022 04:20:26 +0300
In the program engineering training course, a problem occurred:
Mobile phone screenshot nucleic acid detection report, using OpenCV software to automatically identify whether the time for nucleic acid detection is within 72 hours.
Software needed to accomplish this task:
- OpenCV-Py ...
Posted by fitzromeo on Sat, 02 Jul 2022 22:04:45 +0300
I still have the possibility of change
At the thought of this
My heart surged
1, Line detection
The premise of using Hough line transform for line detection is that the edge detection has been completed
# Standard Hough line transformation
cv2.HoughLines(image, rho, theta, threshold, lines=None, srn=None, stn=None, min_theta=None, max_theta= ...
Posted by truCido on Thu, 19 May 2022 11:01:44 +0300
About image sampling
There are many ways to obtain digital images. Usually, image sampling can be used to digitize continuous images. The collection relationship between sampling points is the grid, and the infinitesimal sampling points between grids correspond to the pixels in the image. Sampling on image transformation is the process of cha ...
Posted by rimelta on Fri, 13 May 2022 03:46:16 +0300
Parallel pixel access using forEach in OpenCV
In this tutorial, we will compare the performance of the forEach method of the Mat class and other ways to access and convert pixel values in OpenCV. We will show how to use the foreat method much more efficiently than the foreat method.
There are hidden gemstones in OpenCV, which are sometimes not ...
Posted by gnize on Wed, 11 May 2022 15:12:08 +0300
Two weeks ago, I received the teacher's request to participate in the pattern recognition competition. The content is probably to detect the faces that appear in the video, and then count the number. After seeing it at first, I had no clue. After all, this is the first time I have come into contact with machine vision. I have no direction. Late ...
Posted by cookiemonster4470 on Mon, 09 May 2022 18:31:34 +0300
OpenCV can be used to draw different collection graphics, including lines, rectangles, circles, ellipses, polygons and adding text to images. The drawing functions used include CV2 line()，cv2.circle()，cv2.rectangle() ，cv2.putText() and so on.
These drawing functions need to set parameters, such as:
• img: the image you want to draw. & ...
Posted by drizzle on Mon, 09 May 2022 12:39:28 +0300