Method and apparatus for estimating vanish points from an image, computer program and storage medium thereof

An apparatus for detecting at least one vanishing point from an image, the apparatus comprising:

• a dividing unit for dividing the image into a plurality of patches;
• a first detecting unit for detecting each patch's local orientations;
• a composing unit for composing lines of pencils based on the local orientations detected by said first detecting unit;
• and
• a first computing unit for computing at least one vanishing point based on the lines of pencils composed by said composing unit.

A computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute:

• a dividing step for dividing the image into a plurality of patches;
• a first detecting step for detecting each patch's local orientations;
• a composing step for composing lines of pencils based on the local orientations detected in said first detecting step;
• and
• a first computing step for computing at least one vanishing point based on the lines of pencils composed in said composing step.

A method for detecting at least one vanishing point from an image, the method comprising:

• a second detecting step for detecting an edge of the image and forming an edge image;
• an extracting step for extracting the text baseline from said edge image;
• and
• a finding step for finding a horizontal vanishing point based on the text base line.

An apparatus for detecting at least one vanishing point from an image, the apparatus comprising:

• a second detecting unit for detecting an edge of the image and forming an edge image;
• an extracting unit for extracting the text baseline from said edge image;
• and
• a finding unit for finding a horizontal vanishing point based on the text base line.