Information processing method, information processing apparatus, and recording medium for identifying a class of an object by using a plurality of discriminators

• US 9,147,130 B2
• Filed: 11/27/2012
• Issued: 09/29/2015
• Est. Priority Date: 12/01/2011
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Saruta, Takayuki, Matsugu, Masakazu, Mori, Katsuhiko, Mitarai, Yusuke
• Primary Examiner(s): Chen, Wenpeng
• Application Number:
  US13/685,911
• Publication Number:
  US 20130142443A1
• Time in Patent Office: 1,036 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 18/24 Classification techniques
• CPC Class Codes: G06V 30/19173 Classification techniques
• CPC Class Codes: G06V 30/242 Division of the character sequences into groups prior to recognition; Selection of dictionaries

Abstract

The robustness of discriminating results at each stage is improved in discrimination processing in which a plurality of stages of discriminators are used to identify an object. An information processing apparatus in which a plurality of stages of the discriminators are used to identify a class of an object, comprises a candidate class output unit that acquires as a candidate class a class discriminated at a first stage of the discriminators, and an extended class setting unit that sets in a second stage of the discriminators, a class of a second stage of the discriminators, which is defined as an extended partial space of a partial space defined by a candidate class in a discriminating space used in discriminating the candidate class by the first stage of the discriminators, as a class to be discriminated at this second stage of the discriminators.

Claims

1. An information processing method of identifying a class of an object by using a plurality of discriminators, the method comprising:

acquiring, as a plurality of candidate classes, a plurality of classes discriminated at a first stage of the discriminators; and

setting, in a second stage of the discriminators, a class of the second stage of the discriminators, which is defined as a combined partial space which is formed by combining a first partial space which shows a first range of each of the plurality of candidate classes and a second partial space which shows a second range different from the first range used in discriminating each of the plurality of candidate classes at the first stage of the discriminators, as a class to be discriminated at the second stage of the discriminators, wherein the first range, the second range, and the combined range are in a same discriminating space.

2. The information processing method according to claim 1, wherein the class which is set in the second stage of the discriminators includes a class that identifies an orientation of the object.

3. The method according to claim 1, wherein a class set to the second stage of the discriminators includes a plurality of classes, and the plurality of classes set different partial spaces respectively.

4. An information processing apparatus that uses a plurality of stages of discriminators to identify a class of an object, the apparatus comprising:

an acquisition unit that acquires, as a plurality of candidate classes, a plurality of classes discriminated at a first stage of the discriminators; and

a setting unit that sets in a second stage of the discriminators, a class of the second stage of the discriminators, which is defined as a combined partial space which is formed by combining a first partial space which shows a first range of each of the plurality of candidate classes and a second partial space which shows a second range different from the first range used in discriminating each of the plurality of candidate classes at the first stage of the discriminators, as a class to be discriminated at the second stage of the discriminators, wherein the first range, the second range, and the combined range are in a same discriminating space.

5. A non-transitory computer-readable recording medium that stores a program for causing a computer to function as the units of the information processing apparatus according to claim 4.