Pen & Ink offline utility app 📊 written in html and vanilla JS. Only ~75kb, in a single html file!.
https://gryleader.github.io/drawing-companion/penink-min.html
1️⃣ Access the html file (penink-min.html) with your desktop or mobile browser (you can save the html file to your phone storage and use it without internet connection! 📴 💖).
2️⃣ Press the Browse button and take a picture of your Pen & Ink (or other) drawing. You can also select image from gallery.
3️⃣ See the statistics table populate automatically with values and graphs to help you in making the corrections you need/want.
4️⃣ You can use the quick-adjustment buttons to make simple adjustments to gamma, brightness, contrast, to whiten the midtones, crop the image, etc. These adjustments are optimized for working with pen & ink or grayscale images. For instance, brightness adds more brightness to the blacks than to the "almost whites", so to preserve as much detail as possible.
5️⃣ If you want you can save the adjusted image and reuse it in other apps.
Uses Cropper.js v1.5.12 by Chen Fengyuan (MIT license) to crop the images.
Thanks for your support! It will allow me to continue developments and start new projects. Blessings.