Image Overlaying I

Overlaying a line-grid on top of an image is a very common operation. Image A is a 8x8 image expanded by a factor of 20 using pixel replication. The grid is built using the negation of the maximum of a vertical grid and a horizontal grid:

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Left: Zoomed Image
Center: Vertical Grid
Right: Horizontal Grid

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Left: White Grid: Maximum between Vertical and Horizontal Grids
Center: Black Grid: 255 - White Grid (Negation)
Right: Minimum between Zoomed Image and Black Grid

• Building a visual program (workspace) in cantata
• Execute the visual program grid-on-zoom.wk

Other Image Overlaying Example

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Left: Original
Center: Overlay
Right: Maximum between Original and Overlay