簽名印章提取
提取簽名印章並純化 HSL 色彩空間，漂白雜色與紙張反光，還原高品質透明底透明簽名。
上傳手機拍攝的手寫簽名或印章圖片
關於此工具
The Signature & Stamp Chroma Ink Optimizer functions as a professional high-fidelity ink purifier.
Signatures or corporate seals captured on phones often suffer from yellow paper tint, uneven shadows, and page wrinkles. Pasting them directly onto contract PDFs looks amateur.
This tool separates the Alpha channel based on luminance and color space. It completely bleaches paper backgrounds while sharpening stamp red (Chroma Ink) and handwriting black. The result is a premium, transparent PNG stamp carrying genuine ink textures.
使用方法
Upload seal photo
Provide a phone-captured photo of your signature or stamp seal.
Adjust cleaning sliders
Move contrast and luminance sliders to isolate the background noise in real-time.
Download clean signature
Export as transparent PNG ready to be stamped onto formal document agreements.
使用場景
Professional e-signature prep
Convert gray signature photos into beautiful, transparent layers to sign agreements.
Corporate seal sanitizing
Clean physical stamp scans by discarding paper fiber noise, preparing crisp transparent stamp seals.
Drawn line art extraction
Isolate black strokes from drawing sketchbooks for easy Photoshop coloring workflows.
常見問題
How does self-adaptive Alpha extraction differ from normal keying?
Standard chroma-keying often makes signature stroke details look blocky and pixelated. Our algorithm isolates only white/yellow background noise and smooths the ink borders.
Which image formats are supported?
We support JPG, JPEG, and PNG. For best results, capture your signature photo under bright, even lighting.
Will the handwriting detail be modified?
No. The pixel filtering acts on original coordinates, sharpening contrast while maintaining genuine stroke textures.