The action Transform image

Purpose

The Image Transformation action applies basic image edits automatically as part of a scenario. Use it to rotate, mirror and resize image files before further processing (saving, OCR with AI, stamping, etc.). Supported input file types: JPG, TIFF, PNG, GIF.

Main options

• Rotation (degrees)
  Enter the rotation angle in degrees (e.g., 90, 180, 270 or any arbitrary angle such as 45). The image is rotated clockwise by the specified amount. Use this to correct orientation of scanned or photographed documents.
• Horizontal mirror (flip)
  Toggle Yes/No. When enabled the image is flipped left-to-right.
• Vertical mirror (flip)
  Toggle Yes/No. When enabled the image is flipped top-to-bottom.
• Resize: Percentage (recommended for simple proportional resizing)
  Set new size as a percentage of the original (e.g., 50% reduces both width and height to half). Set to 100% to keep original size.
• Resize: Pixel dimensions (precise control)
  Choose width and height in pixels. If one dimension is set to 0 then the aspect ratio is preserved automatically and the other dimension is used to compute the proportional size. If both width and height are non-zero the image is resized exactly to those dimensions (may change aspect ratio).

Notes about resize behavior

• Percentage mode and pixel mode are mutually exclusive; select the mode that fits your needs.  
• Using a single non-zero pixel value preserves proportion and is useful to limit one dimension (e.g., set Width=1024, Height=0 to scale proportionally by width).  
• Exact pixel resizing (both non-zero) can distort the image if the original aspect ratio is different — avoid unless distortion is acceptable.

Tips and best practices

• Rotate in multiples of 90° when you only need to correct orientation — this avoids interpolation artifacts that arbitrary-angle rotation can introduce.  
• For photographic images choose larger percentage or resolution; for document images choose lossless formats (PNG/TIFF) if further OCR or archival quality is required.  
• When preparing images for web/display, set JPEG output and reduce percentage to lower file size. For further compression, add a downstream action that controls quality (if available).  

Examples

• Fix scans: Rotation = 90, Horizontal mirror = No, Resize percentage = 100 (only rotation).  
• Create thumbnails: Rotation = 0, Resize percentage = 25% (reduce both dimensions to 25%).  
• Fit to width: Rotation = 0, Pixel Width = 1024, Pixel Height = 0 (scale proportionally so width = 1024).  
• Mirror a photo: Horizontal mirror = Yes (flip left-to-right).

This action provides quick and essential image edits suitable for document workflows, thumbnails, and preprocessing for OCR or archiving.