Perspective Straighten

Correct perspective distortion that causes rectangular subjects to appear as trapezoids or parallelograms due to camera angle. When photographing buildings from below, vertical lines converge toward the top; when capturing documents at an angle, rectangles become distorted quadrilaterals. This tool restores proper rectangular geometry.

Drag corner control points to mark the four corners of the distorted rectangle in your image. The tool calculates the perspective transformation matrix and applies it to straighten the quadrilateral into a proper rectangle with perpendicular edges. Real-time preview shows the correction as you adjust corner positions. The output can be cropped to the corrected rectangle or include surrounding areas.

Architectural photographers correcting converging vertical lines in building photos eliminate the "leaning" appearance that occurs when shooting upward. Document scanners straightening angled photos of papers, books, or screens produce clean rectangular output suitable for OCR or reading. Meeting participants capturing whiteboard notes at an angle produce legible, properly-proportioned documentation. Real estate photographers straightening room photos where walls appear to converge correct for wide-angle lens effects. Product photographers fixing perspective distortion in angled shots produce catalog-ready images. Anyone photographing rectangular subjects from non-perpendicular angles will find perspective correction essential for professional results.