Mesu.ro
Ruler.im
ImageJ
Bluebeam Revu
STACK Takeoff Estimating
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On-Screen Takeoff
Active Takeoff
Think Python
Google's Python Class
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Corey Schafer Youtube
Udacity - CS101
mesu.ro is a fully-featured, browser-based measurement tool for images and PDF files. No upload, no account, no installation required โ everything runs locally in your browser. Measurement tools: Distance, diameter, angle (works without scale), area, path/perimeter, and text annotations. All measurements are displayed in real-world units with pixel fallback when no scale is set. Scale calibration: Draw a line over any known reference, enter its real-world value and unit (mm, cm, inches, feet, or any custom unit). The last used value is remembered across sessions. PDF support: Load PDF files directly โ single-page PDFs open instantly, multi-page PDFs show a high-resolution page picker. Pages are rendered at ~430 dpi for precise measurement of technical drawings. Edge snap: Toggle sub-pixel edge detection (full Canny pipeline with Non-Maximum Suppression). The cursor locks onto detected contours with subpixel precision โ ideal for engineering drawings and schematics. Perspective correction (Rectify): Place 4 corner points to correct perspective distortion before measuring. True homography with automatic aspect ratio recovery. Pan & zoom: Mouse wheel zoom up to 20ร, click-drag pan, keyboard arrow navigation. A magnifier overlay shows a 5ร live zoom around the cursor for precise point placement. Export: Annotated image (PNG, JPG, WebP), CSV data table, PDF measurement report with scale info and measurement table. Save/load full project files (.mesuro) to resume work later. Interface: 5 languages (EN, FR, ES, DE, IT), dark theme, keyboard shortcuts for all tools, undo (50 levels), draggable measurement labels.
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Mesu.ro's answer
-engineers -researchers -hobbyist
Mesu.ro's answer
mesu.ro is the only tool that combines: Browser-based, zero friction โ open URL, drop image, measure. No account, no upload, no install PDF import with page selection โ direct load, rendered at 430dpi, no conversion step needed Edge snap โ Canny edge detection with NMS and subpixel interpolation, running entirely client-side in JS Perspective correction โ full homography, not just a crop or rotate Complete measurement suite โ distance, diameter, angle, area, perimeter, notes, all calibrated to real-world units Privacy by design โ images never leave the device, no server, no telemetry on the image data Multilingual โ 5 languages out of the box
Mesu.ro's answer
mesu.ro wins on speed of access and zero friction. No download, no signup, no payment, no learning curve. For anyone who measures images occasionally โ checking a dimension on a photo, measuring a PDF plan, verifying a part from a SEM image โ the barrier to use is essentially zero.
Mesu.ro's answer
Engineers, technicians, and researchers who receive images or PDF drawings and need to extract real dimensions from them. PCB designers checking component placement from a photo. Mechanical engineers measuring a part from a SEM or microscope image. Architects verifying dimensions on a scanned floor plan. They know what a scale is, they measure in mm, and they need a result fast without opening a dedicated software suite.
Mesu.ro's answer
mesu.ro was born out of frustration. As an engineer, I kept needing to measure things in images โ parts, drawings, microscope photos. Every existing tool was either a $500 desktop app, a complex scientific suite, or a basic online tool that only did distance. So I built a single HTML file that did exactly what I needed. No server, no upload, no account. Just drop an image and measure. I added PDF support, edge snap, perspective correction, multilingual interface. At some point I realized I'd accidentally built the tool that should have existed all along. I put it online. A stranger sent $5 on Ko-fi three days later. That was enough.
Mesu.ro's answer
A single HTML file. That's the whole stack โ no framework, no build tool, no dependencies bundled locally. Everything runs in the browser. The technologies inside that file: Vanilla JavaScript โ all measurement logic, canvas rendering, pan/zoom, undo, project save/load HTML5 Canvas API โ drawing the image, measurements, magnifier overlay, snap indicator PDF.js (Mozilla, via CDN) โ PDF parsing and high-resolution page rasterization jsPDF (via CDN) โ PDF report generation client-side Canny edge detection โ implemented from scratch in JS (Gaussian blur, Sobel, NMS, hysteresis, subpixel interpolation) Umami Analytics โ privacy-friendly, self-hosted compatible, no cookies Formspree โ feedback form backend, zero server required GitHub Pages โ hosting, free, zero infrastructure to manage
Based on our record, Think Python seems to be more popular. It has been mentiond 9 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
This course actually starts with an introduction to Python. Since you don't have access yet, you can give Think Python a whirl - https://greenteapress.com/wp/think-python/ and for a more interactive experience, I really enjoyed this one - https://scrimba.com/learn/python. Source: over 3 years ago
Start with Think Python or learn x in y..both are free resources and good for basic understanding and practise. Source: over 3 years ago
This free book taught me Python many years ago https://greenteapress.com/wp/think-python/. Source: about 4 years ago
In terms of learning the basics of Python programming, you can get the first edition of Think Python in PDF form for free. Source: over 4 years ago
Computer Science โ For understanding software development. As for a programming language to learn, I recommend Python or Javascript. Try Crash Course's Computer Science videos, the free Think Python book, and/or Part 1 of The Modern JavaScript Tutorial. Source: over 4 years ago
Ruler.im - Measure anything in actual size with our on-screen ruler. Multiple ruler types for shoe, bra, ring, image & 3D model sizes at home. No physical ruler needed.
Google's Python Class - Assorted educational materials provided by Google.
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The New Boston video series - Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Bluebeam Revu - The end-to-end digital workflow and collaboration solution trusted by over 1 million AEC professionals worldwide. Revu delivers award-winning PDF creation, editing, markup and collaboration technology designed for AEC workflows.
A Byte of Python - A Byte of Python is a Python programming tutorial and learning book that teaches you how to program with the Python programming language.
