What is hidden surface problem in computer graphics?

When we view a picture containing non-transparent objects and surfaces, then we cannot see those objects from view which are behind from objects closer to eye. We must remove these hidden surfaces to get a realistic screen image. The identification and removal of these surfaces is called Hidden-surface problem.

What is hidden surface of an object?

Hidden-surface determination is a process by which surfaces that should not be visible to the user (for example, because they lie behind opaque objects such as walls) are prevented from being rendered.

What is hidden line and surface in computer graphics?

Hidden Line – when outline of an object is to be displayed – similar to clipping a line segment against a window – most surface algorithms can be applied for hidden line elimination. Hidden Line Removal – assumes that objects are modeled with lines.

What is hidden surface removal techniques in computer graphics?

In 3D computer graphics, hidden surface determination (also known as hidden surface removal (HSR), occlusion culling (OC) or visible surface determination (VSD)) is the process used to determine which surfaces and parts of surfaces are not visible from a certain viewpoint.

Why hidden surface algorithms are needed?

The purpose of hidden surface algorithms is to determine which surfaces are obstructed by other surfaces in order to display only those surfaces visible to the eye. In theory, hidden surface algorithms are required for all types of surfaces; in practice, we shall restrict our attention to polygonal models.

What you mean by hidden surface removal?

The hidden surface removal is the procedure used to find which surfaces are not visible from a certain view. A hidden surface removal algorithm is a solution to the visibility issue, which was one of the first key issues in the field of three dimensional graphics.

How many types of hidden surface algorithm are there?

We have discussed five different hidden surface algorithms: z-buffer, scan line, ray casting, depth sort, and bsp-tree. Two key ideas are applied to help increase the speed of these algorithms: sorting of edges by depth, and pixel coherence for depth and intensity.

How many types of hidden surface algorithm are?

What is z-buffer algorithm for removing hidden faces?

Z-buffer, which is also known as the Depth-buffer method is one of the commonly used method for hidden surface detection. It is an Image space method. Image space methods are based on the pixel to be drawn on 2D. For these methods, the running time complexity is the number of pixels times number of objects.

How many types of hidden surfaces are there?

Which algorithm is used for hidden surface are?

The z-buffer algorithm is the most widely used method for solving the hidden surface problem. It has the following major advantages over other hidden surface removal algorithms: No sorting is required. Models can be rendered in any order.