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Why is image classification used to identify bird species within an object detection pipeline?
Prepare for the AI-900 exam by understanding the difference between image classification and object detection. Learn why image classification is the specific computer vision task used to identify the species of individual birds once they have been located in an image.
Question
You have an app that identifies birds in images. The app performs the following tasks: Identify the location of the birds in the image Identify the species of the birds in the image Which type of computer vision would you use to identify the species of individual birds?
A. Image classification
B. Automated captioning
C. Object detection
D. Optical character recognition (OCR)
Answer
A. Image classification
Explanation
The correct type of computer vision is A. Image classification. While the overall process sounds like object detection, the question specifically asks about the task of identifying the species of an individual bird, which is a classification task.
Understanding the Two-Part Process
The app described performs two distinct steps, which are often combined in a single object detection model:
- Locate the birds: This first step involves finding where the birds are in the image, typically by drawing a bounding box around each one.
- Identify the species: This second step, which is the focus of the question, takes the content within each of those bounding boxes and assigns it a label (the species).
This second step is fundamentally an image classification task. The model is treating the sub-image inside each bounding box as a separate image and classifying it into a predefined category (e.g., “Robin,” “Sparrow,” “Blue Jay”).
Why Not Object Detection?
While C. Object detection is the correct answer for the entire solution (locate + identify), the question isolates the identification component. An object detection model can be thought of as a system that first proposes regions of interest and then runs a classifier on those regions. Since the question specifically asks how you would “identify the species of individual birds,” it is drilling down into the classification part of that larger process. For the AI-900 exam, understanding these component tasks is crucial.
Why Other Options Are Incorrect
B. Automated captioning: This generates a descriptive sentence for the entire image (e.g., “A blue jay is perched on a fence”). It does not identify the species of each individual bird.
D. Optical character recognition (OCR): This is used to read text from images and is not relevant for identifying animals.
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