Frequently Asked Questions (FAQ)
Here are answers to frequently asked questions about truvis.
Q. Is truvis free to use?
A. Yes, truvis is completely free to use. No account registration is required.
Q. What image formats are supported?
A. PNG, JPEG, and WEBP are supported. The maximum file size is 100MB.
Q. Are uploaded images stored on the server?
A. No, uploaded images are automatically deleted from the server after processing is complete. Images are never stored or accumulated.
Q. How many characters can be used for the payload?
A. Up to 8 ASCII characters (alphanumeric characters and symbols) can be entered.
Q. Does embedding a watermark degrade image quality?
A. Thanks to Adobe TrustMark technology, changes are imperceptible to the human eye. Image quality is maintained above 40dB PSNR, meaning there is no practical quality degradation.
Q. Can watermarks be detected after posting to social media?
A. In most cases, yes. TrustMark is resistant to JPEG compression and resizing, but detection may be difficult if extreme quality reduction or significant cropping has been applied.
Q. Can watermarks be removed?
A. Invisible watermarks are distributed throughout the image's pixel data, making complete removal while maintaining quality technically very difficult.
Q. Can I use it for commercial purposes?
A. Yes, images processed with truvis can be used for both commercial and non-commercial purposes. However, please ensure you have the copyright and usage rights for the images you upload.
Q. Can I use it on a smartphone?
A. Yes, truvis features a responsive design and can be used from web browsers on smartphones and tablets.
Q. Why does reCAPTCHA appear?
A. Google reCAPTCHA is implemented to prevent abuse of the service (such as mass requests from bots). It does not affect normal usage.
Q. Can I embed watermarks multiple times?
A. Yes, you can embed watermarks in the same image multiple times. However, since multiple embeddings may slightly degrade quality, we recommend a single embedding on the original image. If you need to re-embed with a different payload, start from the original image.
Q. Will the watermark survive image editing?
A. For common image edits (brightness adjustment, color correction, light filters), the watermark is likely to survive. However, significant cropping, extreme compression, or compositing parts of the image into another may make detection impossible.
Q. Is batch processing (processing multiple images at once) available?
A. Currently, truvis processes one image at a time. For processing large numbers of images, batch processing is possible using the open-source Adobe TrustMark library programmatically. We are considering adding batch processing functionality in the future.
Q. What technology powers truvis?
A. truvis's frontend is built with Next.js (React), and the backend watermark processing uses Python FastAPI with the Adobe TrustMark library. All data from upload to processing to download is protected by HTTPS encryption.
Q. Can I use Japanese characters in the payload?
A. Currently, the payload only supports ASCII characters (alphanumeric characters and symbols). Japanese characters (full-width) cannot be used due to the Adobe TrustMark specification. We recommend creating identification codes using ASCII strings such as management numbers or initials instead.