Скачать или смотреть Lesson 22: Threshold Selection for Image using MATLAB

Threshold selection for image using matlab - how to apply a specific threshold value to entire image.

In this tutorial, we are going to learn how to apply global threshold value to an image. It means the same threshold value to all of the pixels. I have used OTSU method to calculate the threshold value that minimizes the inter-class statistical variance of thresholded black and white pixels.

I hope this quick tutorial will help you if you ever get stuck in applying threshold value to an image. Here is the code used in this tutorial -

image = imread('castle.jpg');
threshold_value = graythresh(image);
threshold_image = im2bw(image,threshold_value);

subplot(1,2,1),imshow(threshold_image);
subplot(1,2,2), imshow(image);

You can copy, modify, share or you can do anything else with this code snippet. Thank you for watching. Do not forget to subscribe.