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Flood Fill Algorithm vs. Boundary Fill Algorithm: What's the Difference?

Edited by Huma Saeed || By Sara Rehman || Published on February 10, 2024
Flood fill algorithm fills an area with a chosen color by spreading from a seed point, while boundary fill algorithm fills until it reaches a specified boundary color.

Key Differences

The flood fill algorithm starts from a seed point and floods an area with a specific color, propagating in all directions. The boundary fill algorithm also begins at a point but fills the area until it encounters a boundary of a different color.
Sara Rehman
Feb 10, 2024
Flood fill checks for a target color to replace. In contrast, boundary fill looks for a boundary color to stop the fill process, not filling those pixels.
Huma Saeed
Feb 10, 2024
Flood fill is used in scenarios like filling a continuous area in a paint program. Boundary fill is suitable for filling bounded shapes where the boundary color is known and consistent.
Sara Rehman
Feb 10, 2024
Variants of flood fill include the 4-way and 8-way algorithms, affecting how it spreads. Boundary fill also has variants, such as 4-connected and 8-connected, influencing how it detects boundaries.
Harlon Moss
Feb 10, 2024
Flood fill can be less efficient in complex images with many different colors, while boundary fill might struggle with irregular boundaries or varying boundary colors.
Aimie Carlson
Feb 10, 2024
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Comparison Chart

Starting Condition

Begins at a seed point and spreads
Starts at a point and fills until a boundary
Sara Rehman
Feb 10, 2024

Color Testing

Replaces a target color
Stops at a specified boundary color
Sara Rehman
Feb 10, 2024

Typical Usage

Filling continuous areas
Filling bounded shapes
Sara Rehman
Feb 10, 2024

Algorithm Variants

4-way or 8-way spreading
4-connected or 8-connected boundary detection
Janet White
Feb 10, 2024

Efficiency and Complexity

Less efficient in multi-colored areas
Challenges with irregular or varying borders
Sara Rehman
Feb 10, 2024
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Flood Fill Algorithm and Boundary Fill Algorithm Definitions

Flood Fill Algorithm

Flood fill operates until it reaches different colors.
The flood fill stopped spreading when it hit a border of a different color.
Aimie Carlson
Jan 23, 2024

Boundary Fill Algorithm

Boundary fill is used in computer graphics.
Boundary fill was perfect for filling in the complex pattern without overflow.
Harlon Moss
Jan 23, 2024

Flood Fill Algorithm

Flood fill replaces a target color.
The flood fill algorithm replaced all the red pixels with blue.
Sara Rehman
Jan 23, 2024

Boundary Fill Algorithm

Boundary fill uses a boundary color to stop filling.
Boundary fill stopped when it encountered the black outline of the shape.
Sara Rehman
Jan 23, 2024

Flood Fill Algorithm

Flood fill is used in graphic applications.
I applied the flood fill algorithm to fill colors in a digital drawing.
Harlon Moss
Jan 23, 2024

Boundary Fill Algorithm

Boundary fill is suitable for bounded shapes.
We used boundary fill to color a circle with a defined edge.
Sara Rehman
Jan 23, 2024

Flood Fill Algorithm

Flood fill algorithm fills an area from a seed point.
We used the flood fill algorithm to change the background color in the image.
Sara Rehman
Jan 23, 2024

Boundary Fill Algorithm

Boundary fill algorithm fills an area up to boundaries.
The boundary fill algorithm precisely filled the shape without crossing its borders.
Sara Rehman
Jan 23, 2024

Flood Fill Algorithm

Flood fill spreads out in all directions.
The flood fill algorithm smoothly filled the entire selected area.
Huma Saeed
Jan 23, 2024

Boundary Fill Algorithm

Boundary fill can have 4-connected or 8-connected variants.
The 4-connected boundary fill algorithm effectively filled the square shape.
Aimie Carlson
Jan 23, 2024

FAQs

What's the purpose of the boundary fill algorithm?

To fill an area bounded by a specific color.
Huma Saeed
Feb 10, 2024

How does flood fill determine where to fill?

It fills areas with a target color, spreading out from a seed point.
Sara Rehman
Feb 10, 2024

What does the flood fill algorithm do?

It fills a connected area starting from a seed point.
Sara Rehman
Feb 10, 2024

What stops the boundary fill algorithm from filling?

Encountering a specified boundary color.
Sara Rehman
Feb 10, 2024

Can flood fill handle non-continuous areas?

No, it works best with continuous areas of the same color.
Sara Rehman
Feb 10, 2024

Does flood fill work diagonally?

It depends on the variant: 8-way flood fill can fill diagonally.
Sara Rehman
Feb 10, 2024

Is boundary fill suitable for shapes with uneven borders?

It might struggle with irregular or unclear boundaries.
Sara Rehman
Feb 10, 2024

Where is boundary fill commonly used?

In graphic applications for filling well-defined shapes.
Sara Rehman
Feb 10, 2024

What's a key consideration when using boundary fill?

The boundary color should be consistent and clear.
Aimie Carlson
Feb 10, 2024

What's a common use of flood fill in software?

In paint programs for filling large, uniform areas.
Aimie Carlson
Feb 10, 2024

What happens if the seed point in flood fill is mischosen?

It may fill an unintended area or not fill anything at all.
Sara Rehman
Feb 10, 2024

What's a limitation of the flood fill algorithm?

It may not work well with areas having multiple different colors.
Harlon Moss
Feb 10, 2024

How does color selection affect flood fill?

The algorithm replaces all pixels of the selected target color.
Sara Rehman
Feb 10, 2024

Can boundary fill handle multiple boundary colors?

Generally, it's designed for a single, consistent boundary color.
Aimie Carlson
Feb 10, 2024

Is flood fill algorithm resource-intensive?

It can be, especially in large areas with complex color patterns.
Sara Rehman
Feb 10, 2024

How does the boundary fill algorithm react to gaps in the boundary?

It might fill outside the intended area if there are gaps.
Sara Rehman
Feb 10, 2024

What challenges does boundary fill face?

Difficulty in filling areas with irregular or varied boundary colors.
Harlon Moss
Feb 10, 2024

Can flood fill be customized?

Yes, through different spreading mechanisms like 4-way or 8-way.
Sara Rehman
Feb 10, 2024

How does the choice of seed point affect boundary fill?

It determines where the fill starts and can affect the fill area.
Harlon Moss
Feb 10, 2024

Are flood fill and boundary fill algorithms used in 3D graphics?

They're primarily used in 2D graphics, but concepts can be extended to 3D.
Aimie Carlson
Feb 10, 2024
About Author
Written by
Sara Rehman
Sara Rehman is a seasoned writer and editor with extensive experience at Difference Wiki. Holding a Master's degree in Information Technology, she combines her academic prowess with her passion for writing to deliver insightful and well-researched content.
Edited by
Huma Saeed
Huma is a renowned researcher acclaimed for her innovative work in Difference Wiki. Her dedication has led to key breakthroughs, establishing her prominence in academia. Her contributions continually inspire and guide her field.

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