3x3 Grid Dimension Algorithm

For a 3x3 image grid, compute full grid size and per-cell crop size from videoType and imageSize.

Mapping

Short (9:16)

• 1K: grid 768x1376, cell 256x459
• 2K: grid 1536x2752, cell 512x917
• 4K: grid 3072x5504, cell 1024x1835

Long (16:9)

• 1K: grid 1376x768, cell 459x256
• 2K: grid 2752x1536, cell 917x512
• 4K: grid 5504x3072, cell 1835x1024

Return Shape

{
  gridSize: '3072x5504',
  cellSize: '1024x1835',
  width: 3072,
  height: 5504,
  cellWidth: 1024,
  cellHeight: 1835
}

Usage

Use these dimensions for:

• generation request config
• post-generation crop math
• metadata validation