About Pscale

Pscale (also pronounced as P Scale or P-Scale) is a free and an advanced image measurement, image analysis, and visual measurement software designed to turn photographs into interactive, measurable workspaces. It allows users to analyze images, measure objects and surfaces, calculate dimensions, inspect image details, and perform accurate visual measurements directly from photographs.

Unlike a simple image ruler, Pscale combines photo measurement, image analysis, real-world calibration, geometric measurement, and perspective correction in one workflow. Users can establish a known scale from a reference measurement or define a four-point 3D perspective plane to correct the keystone effect in photographs taken at an angle.

Pscale supports a wide range of image measurement and geometric analysis methods, including distance measurement, line measurement, angle measurement, polygon measurement, area measurement, perimeter measurement, circle measurement, ellipse measurement, freehand measurement, point analysis, pixel analysis, and coordinate inspection. Calculated measurement values can be displayed directly on the image, making it easy to connect numerical results with the objects being analyzed.

The 3D perspective plane correction feature is designed for measuring flat surfaces such as floors, walls, tables, panels, roads, and other photographed planes where perspective distortion affects apparent dimensions. By defining four reference points and providing real-world dimensions, Pscale creates a corrected measurement plane and a visual perspective grid for perspective-aware image measurements.

Pscale also supports 2D image calibration using known dimensions, custom measurement units, high-magnification image inspection, pixel-level analysis, adaptive rulers, and interactive editing of measurement points. Users can adjust references and measurements directly on the photograph while the calculated results update automatically.

Pscale’s Advanced Shape Recognition feature helps users automatically identify clearly visible shapes in an image, reducing the need to manually trace every object. 

For professional and technical workflows, Pscale provides image metadata analysis, measurement data organization, customizable measurement and reference colors, Light and Dark themes, undo/redo editing, CSV export, metadata export, annotated image export, and a dedicated .pscale project format for saving and continuing work later.

Pscale is designed for desktop and mobile image analysis, with touch-friendly controls for zooming, panning, selecting, and editing measurement points.