| Value | Google Feature | Description | 
|---|---|---|
| iegrWebDetection | WEB_DETECTION | Run web detection | 
| iegrSafeSearchDetection | SAFE_SEARCH_DETECTION | Run Safe Search to detect potentially unsafe or undesirable content | 
| iegrLabelDetection | LABEL_DETECTION | Run label detection | 
| iegrObjectLocalization | OBJECT_LOCALIZATION | Run localizer for object detection | 
| iegrFaceDetection | FACE_DETECTION | Run face detection | 
| iegrLandmarkDetection | LANDMARK_DETECTION | Run landmark detection | 
| iegrLogoDetection | LOGO_DETECTION | Run logo detection | 
| iegrTextDetection | TEXT_DETECTION | Run text detection / optical character recognition (OCR). Text detection is optimized for areas of text within a larger image; if the image is a document, use iegrDocumentTextDetection instead | 
| iegrDocumentTextDetection | DOCUMENT_TEXT_DETECTION | Run dense text document OCR. Takes precedence over iegrTextDetection | 
| iegrCropHintsDetection | CROP_HINTS | Run crop hints | 
| iegrProductSearch | PRODUCT_SEARCH | Run Product Search (Unhandled) | 
| iegrImageProperties | IMAGE_PROPERTIES | Compute a set of image properties, such as the image's dominant colors |