BrushCue Tool
Threshold Image to Black and White Online
Click to get startedDrop your image here
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What you can expect
This tool compares the linear R, G and B components of an image. If any item is below the threshold, it returns black. Otherwise, it returns white. Useful in computer vision tasks and stylistic effects.
Related tools
More BrushCue tools that fit this workflow.
Lightness Threshold
Applies a threshold to the OkLab L (lightness) component, analogous to how Color Threshold operates on individual RGB channels. This tool converts continuous tonal values into hard transitions, producing a stark, high-contrast, etching-like effect that emphasizes form and structure.
Sobel Edge Detection
Interactive, browser-based Sobel edge detection demo for research and experimentation. Upload images to visualize gradient-based edge detection in real time—ideal for learning, prototyping, and exploring computer vision concepts directly in the browser.
Frequently asked questions
- How to apply a color threshold to an image?
- Select your file, then set the R, G, and B threshold values — pixels above each threshold become white, below become black.
- What does the Color Threshold tool do?
- It compares each pixel's R, G, and B values against a threshold and returns pure black or white for each channel independently.
- Is this like Photoshop's Threshold adjustment?
- Similar — Photoshop's Threshold works on luminance only. This tool applies independent thresholds per R, G, and B channel for more granular color control.
- What file formats can I export?
- You can export as PNG, JPEG, WebP, TIFF, BMP, or HEIC.
- Is this tool free to use?
- Yes — completely free, no account needed. Your images are processed entirely in your browser and never uploaded to a server. Downloads have no watermarks.
For developers
Use Color Threshold from Python
Open the Jupyter notebook example to see how to run this tool from the BrushCue Python API, inspect the processing steps, and adapt the workflow for scripts or batch image jobs.
View Python notebookBuild your own
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