Image Compose

Image Compose

Lay out several images into one composite. Outputs the merged image and, optionally, a manifest describing where each source image (panel) landed — feed that manifest to image-annotate to draw on a specific panel without computing pixel offsets by hand.

Usage

python scripts/compose.py IMG1 IMG2 [IMG3 ...] -o OUTPUT.png [options]

Options

• --layout horizontal|vertical|grid (default: horizontal)
• --cols N columns when layout is grid (default: ~square)
• --gap PIXELS spacing between panels (default: 24)
• --gap-color COLOR background/gap fill (default: white)
• --labels "A,B,..." one title per image, comma-separated, in order
• --label-bg, --label-fg, --label-size, --label-height label bar styling
• --manifest PATH write panel-position JSON (pass this to image-annotate)

horizontal matches panel heights; vertical matches widths; grid centers each image in equal cells. JPEG output is auto-flattened.

Examples

Two screenshots side by side with titles, saving a manifest:

python scripts/compose.py before.png after.png \
  --layout horizontal --gap 30 --labels "Before,After" \
  --manifest layout.json -o combined.png

Four captures in a 2-column grid:

python scripts/compose.py a.png b.png c.png d.png \
  --layout grid --cols 2 -o grid.png

Manifest format

{"output":"combined.png","size":[870,344],"layout":"horizontal",
 "panels":[{"index":0,"label":"Before","x":0,"y":44,"w":420,"h":300},
           {"index":1,"label":"After","x":450,"y":44,"w":420,"h":300}]}

Panel x,y is the top-left of that image’s content area inside the composite — i.e. below its label bar if one was added. This means a coordinate you measured in the original screenshot maps directly: image-annotate resolves "panel": N by adding this x,y, so no need to compensate for label height yourself. w,h describe the content region (excluding the label bar).

Requirements

pip install Pillow

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: colbytimm
• Source: colbytimm/my-dev-tools
• License: MIT

Install and usage instructions live in the source repository linked above.