Here we show how to get Google Vision to run OCR on a PDF in Google Storage using NodeJS.
Firstly, install the SDK.
npm install --save @google-cloud/vision
Here’s the code. It will grab the PDF (or TIFF - the other supported format) from the location gcsSourceUri and once completed, put the OCR JSON in the location gcsDestinationUri.
const vision = require('@google-cloud/vision')
function ocr() {
const gcsSourceUri = `gs://your-bucket-name/path/to/the.pdf`
const gcsDestinationUri = `gs://your-bucket-name/path/to/ocr.json`
const inputConfig = {
// Supported mime_types are: 'application/pdf' and 'image/tiff'
mimeType: 'application/pdf',
gcsSource: {
uri: gcsSourceUri
}
}
const outputConfig = {
gcsDestination: {
uri: gcsDestinationUri
}
}
const features = [{ type: 'DOCUMENT_TEXT_DETECTION' }]
const request = {
requests: [
{
inputConfig: inputConfig,
features: features,
outputConfig: outputConfig
}
]
}
return client.asyncBatchAnnotateFiles(request)
.then(([operation]) => operation.promise())
.then(([filesResponse]) => {
return filesResponse
})
}
The response filesResponse contains some more details about the completed operation, but you can now find your OCR result in Google Storage at the defined location.