<p>Detects custom labels in a supplied image by using an Amazon Rekognition Custom Labels model. </p> <p>You specify which version of a model version to use by using the <code>ProjectVersionArn</code> input parameter. </p> <p>You pass the input image as base64-encoded image bytes or as a reference to an image in an Amazon S3 bucket. If you use the AWS CLI to call Amazon Rekognition operations, passing image bytes is not supported. The image must be either a PNG or JPEG formatted file. </p> <p> For each object that the model version detects on an image, the API returns a (<code>CustomLabel</code>) object in an array (<code>CustomLabels</code>). Each <code>CustomLabel</code> object provides the label name (<code>Name</code>), the level of confidence that the image contains the object (<code>Confidence</code>), and object location information, if it exists, for the label on the image (<code>Geometry</code>). </p> <p>To filter labels that are returned, specify a value for <code>MinConfidence</code>. <code>DetectCustomLabelsLabels</code> only returns labels with a confidence that's higher than the specified value. The value of <code>MinConfidence</code> maps to the assumed threshold values created during training. For more information, see <i>Assumed threshold</i> in the Amazon Rekognition Custom Labels Developer Guide. Amazon Rekognition Custom Labels metrics expresses an assumed threshold as a floating point value between 0-1. The range of <code>MinConfidence</code> normalizes the threshold value to a percentage value (0-100). Confidence responses from <code>DetectCustomLabels</code> are also returned as a percentage. You can use <code>MinConfidence</code> to change the precision and recall or your model. For more information, see <i>Analyzing an image</i> in the Amazon Rekognition Custom Labels Developer Guide. </p> <p>If you don't specify a value for <code>MinConfidence</code>, <code>DetectCustomLabels</code> returns labels based on the assumed threshold of each label.</p> <p>This is a stateless API operation. That is, the operation does not persist any data.</p> <p>This operation requires permissions to perform the <code>rekognition:DetectCustomLabels</code> action. </p> <p>For more information, see <i>Analyzing an image</i> in the Amazon Rekognition Custom Labels Developer Guide. </p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}