Welcome to our in-depth guide on image thresholding! If you’ve ever wanted to convert images to black and white or create binary masks, you’ve come to the right place. In this post, we’ll explore the ins and outs of our online Image Threshold tool, covering everything from basic binarization to advanced techniques like dithering and region selection. Whether you’re a designer, photographer, or just curious about image processing, you’ll find valuable insights here.
What is Image Thresholding (Binarization)?
The binarization (or image threshold) is a process that transforms an image into a two-color picture: black and white. This means that each pixel in the image will be 1 (255) for white and 0 for black depending on whether it exceeds a certain threshold value.
Getting Started with Our Online Tool:
This online image utility has several thresholding options that provide additional functionality and convenience. To get more information on how to extract binary mask from an image or illustration, you can read the following points:
- Open The Image Threshold Tool
Navigate to the Image binarization tool
- Upload your Image
Drag and drop your image or select it from your device via the “Browse” button. The tool supports JPEG, PNG, and WebP formats.
- Adjust the Smooth Level (Noise Reduction):
Image noise can create unwanted speckles in your binary image. The Smooth slider reduces this noise by blurring the image slightly before binarization. Higher values result in more blurring.
- Adjust the Threshold Value:
Use the Threshold slider to control what part of the picture is considered background (black) and what is foreground (white).
- Download
Save your binarized image.
Additional Control Options
The Image Binarization tool has a few additional and handy options which are:
Automatic Thresholding (Auto Detect):
Click the Auto Detect button to have the tool automatically estimate the best threshold value. While convenient, this is an estimation and may not always produce perfect results, especially for images with complex lighting or backgrounds. It’s great for quick results, but manual adjustment often provides better control.
Apply Dithering
Dithering simulates shades of gray in a binary image by arranging black and white pixels in specific patterns. This creates a more visually appealing result, especially for images with subtle gradients. Click the Dithering button to apply this effect. Note that the effect may be more noticeable on larger images or when viewing the full-scale result.
Try Dithering on Your Images! 👉
Region of Interest
To apply binarization to only a specific area of your image, use the ROI tool. Hold down the left mouse button and draw a rectangle over the desired area. This is useful for focusing on specific elements within your image.
Example Results
Conclusion
With our Image Threshold App, you can easily create binary masks of images or specific regions. It’s a free online tool that converts images to black and white with just a few clicks. Whether you need to prepare images for OCR, create artistic effects, or simply experiment with image processing, our tool provides the functionality you need.
