Crop: Express Cropping Tool with Switchable Luminance and Chroma Preview

An image with a green square with crosshairs
Cropping is as easy as clicking and dragging with the mouse

The crop module is an easy-to-use image cropping tool with quick aspect ratio presets and switchable luminance and chroma preview modes.

The module was designed to quickly find and eliminate stacking artefacts across luminance and chrominance data, as well as help with framing your object(s) of interest.


The Crop module user interface
The Crop module has a simple interface with 8 popular aspect ratio presets.

Using the crop module is fairly straightforward. The desired crop is created by clicking and dragging with the mouse the area to retain. Fine-tuning can be accomplished by changing the X1, Y1 and X2, Y2 coordinate pair parameters.

8 preset crops are available. Their names ('3:2', '2:3', '16:9', 9:16') denote the aspect ratio, while the smaller or greater sign prefix denotes their behaviour;

  • Presets with the greater-than ('>') sign will grow the current selection to achieve the selected aspect ratio
  • Presets with the smaller-than ('<') sign will shrink the current selection to achieve the selected aspect ratio

A 'Color' button is available, which functions much like the Color button in the Wipe module. It is only available when Compose mode is engaged (e.g. luminance and chroma are being processed separately, yet simultaneously) and allows you to switch the view between the luminance and chroma datasets that are being processed in parallel. The later is useful if, for example, you need to crop stacking artefacts that only exist in the chroma dataset, but not in the luminance dataset. Because chrominance data always remains linear and is never stretched like the luminance dataset, a courtesy (non-permanent) AutoDev is applied, so you can better see what is in the chrominance dataset.