https://foddo.merginit.com/learn/ Interactive watermarking lessons for creators: see why marks die under compression, crops and screenshots, then pick a method that survives your route. en https://foddo.merginit.com/learn/visible-vs-invisible/ https://foddo.merginit.com/learn/visible-vs-invisible/ Fri, 04 Sep 2026 12:00:00 GMT Two different jobs. Visible marks make casual reposts ugly. Invisible per-subscriber IDs answer which copy escaped after a leak. Most creators need both, in different places. https://foddo.merginit.com/learn/how-invisible-works/ https://foddo.merginit.com/learn/how-invisible-works/ Fri, 04 Sep 2026 12:00:00 GMT Each subscriber receives a file that looks identical but carries a private recipient ID. When a leak appears, you recover that ID from the exact downloaded file and match it to your delivery record. https://foddo.merginit.com/learn/lsb-fragility/ https://foddo.merginit.com/learn/lsb-fragility/ Fri, 04 Sep 2026 12:00:00 GMT Least-significant-bit hiding is invisible and trivially destroyed. Embed a message in your browser, export PNG versus JPEG, and watch the payload survive once and die once. https://foddo.merginit.com/learn/compression-crop-killer/ https://foddo.merginit.com/learn/compression-crop-killer/ Fri, 04 Sep 2026 12:00:00 GMT Drag three sliders and watch similarity collapse. Re-encodes change bytes while the image still looks the same, crops delete evidence outright, screenshots create a brand-new bitmap. https://foddo.merginit.com/learn/pick-your-method/ https://foddo.merginit.com/learn/pick-your-method/ Fri, 04 Sep 2026 12:00:00 GMT LSB, DCT, TrustMark, Robust Transform and WAM fail in different places. Answer four questions about format, channel, compression and screenshot risk to get an honest recommendation. https://foddo.merginit.com/learn/limits-evidence/ https://foddo.merginit.com/learn/limits-evidence/ Fri, 04 Sep 2026 12:00:00 GMT No watermark survives everything. Learn the evidence chain that still gives you options: preserve the file, compare, audit metadata, and only then attribute. https://foddo.merginit.com/learn/metadata-survival/ https://foddo.merginit.com/learn/metadata-survival/ Fri, 04 Sep 2026 12:00:00 GMT Scan a phone photo, count the EXIF and GPS tags riding along, strip them with a canvas re-export, and verify zero. All local. https://foddo.merginit.com/learn/csv-is-the-map/ https://foddo.merginit.com/learn/csv-is-the-map/ Fri, 04 Sep 2026 12:00:00 GMT One duplicate recipient_id means two humans share one fingerprint. Break a list live, watch the collision, fix it, and confirm every ID names exactly one human. https://foddo.merginit.com/learn/frequency-domain/ https://foddo.merginit.com/learn/frequency-domain/ Fri, 04 Sep 2026 12:00:00 GMT Your image as 8×8 cosine blocks: heatmap the mid-band hiding space, then quantize it away and watch detail dissolve in the exact order JPEG kills. https://foddo.merginit.com/learn/will-it-carry/ https://foddo.merginit.com/learn/will-it-carry/ Fri, 04 Sep 2026 12:00:00 GMT Texture and edge analysis scores your photo as a watermark carrier. Test your flattest pack image. The gap between best and worst is your real risk spread. https://foddo.merginit.com/learn/pack-audit/ https://foddo.merginit.com/learn/pack-audit/ Fri, 04 Sep 2026 12:00:00 GMT Drop up to 20 images: dimensions, metadata tags and carrier scores in one table, exportable as a release-notes CSV. Batch thinking without the app. https://foddo.merginit.com/learn/takedown-notices/ https://foddo.merginit.com/learn/takedown-notices/ Fri, 04 Sep 2026 12:00:00 GMT Platform-tailored notice generator with an evidence checklist attached. General information, not legal advice. Get counsel for high-value disputes. https://foddo.merginit.com/learn/case-files/ https://foddo.merginit.com/learn/case-files/ Fri, 04 Sep 2026 12:00:00 GMT Fictional training scenarios with real fixture files: a Telegram forward, a cropped repost, a dirty CSV. Work each with the free tools, then reveal the solution.