How is the merged resolution calculated?

The merged image width equals one full frame width plus the non-overlapping portion of each additional column. For example, 3 frames at 6000px with 30% overlap: 6000 + 2 x (6000 x 0.7) = 14,400px. The same applies vertically for rows.

What is the Brenizer method?

The Brenizer method (or bokeh panorama) uses a fast telephoto lens (85mm f/1.4) to shoot a multi-frame panorama that is then stitched together. This creates an image with the wide-angle field of view but the shallow depth of field of the telephoto lens — an effect impossible with a single exposure.

What overlap is needed for photo merges?

For standard panoramic stitching, 25-35% overlap works well. For the Brenizer method, use 30-50% overlap to ensure accurate stitching with the very shallow depth of field. More overlap means more frames but better stitching accuracy.

How much storage space do merged images need?

A merged TIFF from multiple RAW files can be very large. A 3-frame panorama from a 24MP camera produces roughly a 50MP file — about 150MB as a 16-bit TIFF. Grid merges (e.g., 3x3 from 45MP camera) can easily exceed 1GB per merged file.

Photo Merge Calculator — Final Resolution from Multiple Images

Calculate the final resolution when merging multiple images horizontally, vertically or in a grid.

Frame Width

Single image width

Frame Height

Single image height

Merge Type

How frames are arranged

Columns

Number of frames across

Overlap

Frame-to-frame overlap

How We Calculate This

This calculator estimates the final resolution from multiple stitched images:

Horizontal Merge

Final width = frame width + (columns - 1) x frame width x (1 - overlap)

Vertical Merge

Final height = frame height + (rows - 1) x frame height x (1 - overlap)

Grid Merge

Both formulas apply simultaneously for grid merges, giving final width and height independently.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates based on standard optical and photographic formulas. Results may vary with specific equipment.