## What is scan line filling algorithm?

Scanline filling is basically filling up of polygons using horizontal lines or scanlines. This algorithm works by intersecting scanline with polygon edges and fills the polygon between pairs of intersections.

**What is area filling techniques in computer graphics?**

Filled Area Primitives: Area filling is a method or process that helps us to fill an object, area, or image. We can easily fill the polygon. The polygon filling is defined as filling or highlighting all the pixels. The pixels appear inside the polygon shape with any color other than the background color.

### What is polygon filling?

62. Filling the Polygon Filling the polygon involves deciding whether or not to draw pixels, adding to and removing edges from the active edge table, and updating x values for the next scan-line.

**Why we use scan line algorithm?**

Scanline rendering (also scan line rendering and scan-line rendering) is an algorithm for visible surface determination, in 3D computer graphics, that works on a row-by-row basis rather than a polygon-by-polygon or pixel-by-pixel basis.

## What is scan line coherence?

It is an image space algorithm. It processes one line at a time rather than one pixel at a time. It uses the concept area of coherence. This algorithm records edge list, active edge list. Active Edge List (AEL) contain edges a given scan line intersects during its sweep.

**What are the rules for polygon filling using scan line fill algorithm?**

Scan Line Algorithm Step 1 − Find out the Ymin and Ymax from the given polygon. Step 2 − ScanLine intersects with each edge of the polygon from Ymin to Ymax. Name each intersection point of the polygon. As per the figure shown above, they are named as p0, p1, p2, p3.

### What is area filling?

area filling Painting a defined area with a specific color or pattern. If the area is defined by a set of boundary pixels, there are specific algorithms for area filling starting from a seed pixel inside the boundary. A Dictionary of Computing.

**What is region filling?**

Region-Filling is a method to fill a bounded region with a certain color or image. It means filling the color in a pixel which is connected with other 4 or 8 pixels, and then algorithm fills the color in all pixels in the Region.

## What is polygon filling in CG?

What is Polygon Filling Algorithm? An ordered list of vertices forms a polygon. The pixels that fall on the border of the polygon are determined and the pixels that fall inside are determined in order to colour the polygon.

**What is area coherence?**

area coherence The constancy of a property over an area. Computer-graphics algorithms often take advantage of area coherence, image compression being an example. A Dictionary of Computing. “area coherence .”

### What is the application of coherence property in scan line polygon fill algorithm?

The various points of intersection are stored in the frame buffer. The intensities of such points is keep high. Concept of coherence property is used. According to this property if a pixel is inside the polygon, then its next pixel will be inside the polygon.

**Which is a basic approach used to fill the polygon?**

There are two basic approaches used to fill the polygon. One way to fill polygon is to start from given “seed”, point known to be inside the polygon and highlight outward from this point i.e. neigh-bouring pixels until we encounter the boundary pixels.

## What is the area fill algorithm for scan lines?

Area Fill Algorithm The algorithm can be summarized as follows: 1. define seed point, 2. fill scan line containing seed point, 3. for scan lines above and below, define new seed points as: i) first point inside left boundary, ii) subsequent points within boundary whose left neighbor is outside, 4.

**What is the scan-line algorithm?**

The Scan-Line Algorithm is an area filling algorithm. In this algorithm, we can fill the polygons through horizontal lines or scan lines. The scan-line intersects the edges of the polygon, and the polygon is filled between pairs of the intersection.

### What are the different fill algorithms?

Polygon Filling Algorithm Scan Line Algorithm. This algorithm works by intersecting scanline with polygon edges and fills the polygon between… Flood Fill Algorithm. Sometimes we come across an object where we want to fill the area and its boundary with different… Boundary Fill Algorithm. The

**What is scanscanline filling?**

Scanline filling is basically filling up of polygons using horizontal lines or scanlines. The purpose of the SLPF algorithm is to fill (color) the interior pixels of a polygon given only the vertices of the figure.

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