Based on the minimum and maximum overlap (blending area), display resolution, and layout size, calculate the required input image sizes that must be cropped before sending to each projector:

Projector display resolution (W × H)

• 3840 × 2160
• 1920 × 1080

Overlap: minimum 10% and maximum 45% for display width and height

Projector layout (M × N)

• Up to 5 × 5

Input image size (desired image to be displayed by all blended projectors blended):

• Calculate input image width:
  • Max width: (W × M) – (10% of W) × (M – 1)
  • Min width: (W × M) – (45% of W) × (M – 1)

• Calculate input image height
  • Max height: (H × N) – (10% of H) × (N – 1)
  • Min height: (H × N) – (45% of H) × (N – 1)

Crop the input image for each projector in the blending layout. The following example is for a 2 × 2 layout:

• Make 4 copies of the input (original) image
• Crop each copy to the projector display
• Input each cropped copy into the appropriate projector in the blending layout size
  

  Example:

  W × H = 3840 × 2160 and M × N = 2 × 2 layout and 10% overlap (blending area)
  • Overlap calculation:
    • Width overlap: 10% (384)
    • Height overlap: 10% (216)
  • Input image size calculation
    • Max width (3840 × 2) – (10% of 3840) × (2 – 1) = 7680 – 384 × 1 = 7296
    • Max height (2160 × 2) – (10% of 3840) × (2 – 1) = 4320 – 216 × 1 = 4104
  • Crop the input image for each projector in the layout

  The resulting layout is as follows:

  Figure 14-3 Example Blending Layout Results