GIMP for Engineers — The Complete Guide: Free Editing of Site Photos and Report Images
GIMP is an open-source image editor, completely free, with capabilities close to Photoshop: layers, masks, selection tools, colour correction and dozens of filters. For engineers it is mainly useful for working with site photos and report images.
GIMP
GIMP team
Advanced image editing — site photos, perspective correction, marking defects and preparing images for reports.
Get it from the vendorEngineering uses
- Perspective correction — straightening a building facade photographed at an angle, for example to mark cracks or damp on it.
- Lens distortion correction — in drone and wide-angle photos.
- Marking defects — arrows, circles and numbering on the photo, on a separate editable layer.
- Report preparation — cropping, straightening, brightening and reducing file size, so a PDF report does not weigh tens of megabytes.
- Batch processing — with the BIMP plugin: resize and watermark a whole folder in one click.
What to know
The interface differs from Photoshop and takes a few hours to get used to. For precise measurement on an image (lengths, areas, particle counts), Fiji is better. For technical figures, diagrams and arrows that stay sharp at any size — Inkscape.
Inkscape
Inkscape project
Vector graphics editor — schematics, technical illustrations, report figures and SVG, PDF and DXF editing.
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Fiji (ImageJ)
ImageJ / Fiji community
Scientific image processing and analysis — measure cracks, grains, pores and dimensions from photos and micrographs.
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ShareX
ShareX team
Screenshots and screen recording for Windows — annotate with arrows and labels, and extract text with OCR.
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WebODM (OpenDroneMap)
OpenDroneMap
Photogrammetry from drone imagery — orthophoto, elevation model, point cloud and textured 3D model.
Get it from the vendorThe bottom line
For any engineer who takes site photos and writes reports, GIMP is a free tool that saves a Photoshop subscription. Combined with Inkscape for figures, it covers almost every graphic need of an engineering office.