Use smart cropping

smartCrop(optional, boolean || object) - Activates the smart cropping feature for an original image. If the value is true, then the feature returns the first face detected from the original image with no additional options. For example:

const imageRequest = JSON.stringify({
    bucket: "<myImageBucket>",
    key: "<myImage.jpeg>",
    edits: {
        smartCrop: true
    }
})

The following smartCrop variables are shown in the following code sample:

smartCrop.faceIndex(optional, number) - Specifies which face to focus on if multiple are present within an original image. The solution indexes detected faces in a zero-based array from the largest detected face to the smallest. If this value isn’t specified, Amazon Rekognition returns the largest face detected from the original image. smartCrop.padding(optional, number) - Specifies an amount of padding in pixels to add around the cropped image. The solution applies the padding value to all sides of the cropped image.

const imageRequest = JSON.stringify({
    bucket: "<myImageBucket>",
    key: "<myImage.jpeg>",
    edits: {
        smartCrop: {
            faceIndex: 1,  // zero-based index of detected faces
            padding: 40,   // padding expressed in pixels, applied to all sides
        }
    }
})