ImageInstanceQ

ImageInstanceQ[image,obj]

gives True if image appears to be an instance of the object obj, and gives False otherwise.

ImageInstanceQ[image,obj,cat]

assumes that the image is of something in the category cat.

Details and Options

  • ImageContainsQ tries to identify whether an image is an instance of a given category.
  • Possible forms for both object obj and category cat are:
  • "type"entity type, as used in Interpreter
    "concept"named concept, as used in "Concept" entities
    "word"English word, as used in WordData
    wordspecword sense specification, as used in WordData
    Entity[]any appropriate entity
    instance1|instance2|any of the instancei
  • The following options can be given:
  • AcceptanceThreshold0.5what recognition probability to require
    PerformanceGoalAutomaticfavor algorithms with specific advantages
    RecognitionPrior0.5prior probability for a True result
    TargetDevice"CPU"the target device on which to compute
  • ImageInstanceQ uses machine learning. Its methods, training sets and biases included therein may change and yield varied results in different versions of the Wolfram Language.
  • ImageInstanceQ may download resources that will be stored in your local object store at $LocalBase, and can be listed using LocalObjects[] and removed using ResourceRemove.

Examples

open allclose all

Basic Examples  (2)

Test whether an image is an instance of a particular object:

Perform the test within a specific category:

Options  (2)

AcceptanceThreshold  (1)

Using the default AcceptanceThreshold, an object may not be identified:

Specify a lower threshold to accept a less certain match:

RecognitionPrior  (1)

The default RecognitionPrior is 0.5:

Assign a very low prior probability to the object to be tested for in the image:

Introduced in 2015
 (10.1)