Image Thresholding
Convert the picture to pure black and white according to the brightness threshold, which can invert the foreground and background.
Files and results are only processed in this browser, and the server is not uploaded. Files are not preserved after leaving or emptying the page; the original file will not be modified.
Image Thresholding User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- Adjust the threshold to separate the scanned text from the background.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
Use weighted luminance 0.2126R + 0.7152G + 0.0722B and preserve the original alpha channel.
scope of use
This is pixel binarization, not OCR or smart de-background; inversion is set on the same page as the threshold.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
This is pixel binarization, not OCR or smart de-background; inversion is set on the same page as the threshold. Please compare the input unit, rounding method, applicable rules and data version first.