PDF4me

Comprehensive PDF and document processing: generate barcodes, convert files, extract data, manipulate images, and automate workflows with the PDF4ME API

Actions80

Overview

This node operation "Rotate Image By EXIF Data" processes an image file to automatically rotate it according to its embedded EXIF orientation metadata. This is useful when images are taken with devices that store orientation information in EXIF tags rather than physically rotating the pixels, which can cause images to appear sideways or upside down in some viewers.

Common scenarios include:

Automatically correcting the orientation of photos uploaded from cameras or smartphones before further processing or display.
Preparing images for consistent presentation in workflows that involve image manipulation, storage, or sharing.
Ensuring that rotated images maintain correct orientation without manual intervention.

For example, a user might upload a batch of photos from a smartphone where some images are rotated incorrectly due to device orientation. Using this node operation, all images can be normalized to their correct upright orientation based on EXIF data.

Properties

Name	Meaning
Input Data Type	Choose how to provide the image file to rotate by EXIF data: - Binary Data (from previous node) - Base64 String (base64 encoded image content) - URL (link to image file)
Input Binary Field	Name of the binary property containing the image file (used only if Input Data Type is Binary Data)
Base64 Image Content	Base64 encoded string of the image content (used only if Input Data Type is Base64 String)
Image URL	URL to the image file to rotate by EXIF data (used only if Input Data Type is URL)
Output File Name	Desired filename for the output rotated image file
Async	Enable asynchronous processing (true/false)
Binary Data Output Name	Custom name for the binary data field in the node's output

Output

The node outputs the rotated image as binary data under the specified binary data output name (default: "data"). The output contains the image file correctly oriented according to its EXIF metadata.

The JSON output includes metadata about the processed item, and the binary data holds the actual rotated image file ready for downstream nodes or export.

Dependencies

Requires access to image data either as binary input, base64 string, or via a URL.
No explicit external API keys or services are indicated; the rotation logic is handled internally.
If using URL input, the node must have network access to fetch the image.
Asynchronous processing can be enabled for potentially improved performance.

Troubleshooting

Image not rotated correctly: Ensure the input image actually contains valid EXIF orientation metadata. Some images may lack this data, resulting in no rotation.
Invalid input data errors: Verify that the input matches the selected Input Data Type (e.g., binary data exists in the specified binary property, base64 string is properly formatted, or URL is accessible).
Network errors when using URL: Confirm the URL is reachable and returns a valid image file.
Output file name issues: Use valid filename characters and extensions compatible with the image format.
Asynchronous processing problems: If enabled async causes unexpected behavior, try disabling it to check for differences.