Separate Channels

Extract color channels from a whole folder at once. Switch between RGB and CMYK, tick only the channels you need, and get each one as a separate grayscale file.

How to extract grayscale channels from images using reaConverter

Split RGB images into grayscale channels for red, green, and blue, or delve into CMYK images to extract cyan, magenta, yellow, and black channels. This can be useful for isolating specific color information in an image or for creating special effects.

1. Load Images

Open your images in reaConverter.

2. Separate Channels

In the Image editing tab, click Add action and select Color Adjustments → Separate Channels action.

Here you can choose a color model to separate your images. For RGB images reaConverter will split images into three grayscale images: red, green, and blue. For CMYK images reaConverter will split each image into four grayscale images: cyan, magenta, yellow, and black.

3. Save the Result

Decide where you want to save separated images with individual channels. Finally, choose output format for your images.

Click the Convert button to process all loaded images.

Separate Channels on your PC

The fast and easy way to convert pictures into per-channel grayscale images on your PC is to use reaConverter. The software runs completely offline, keeping your photos safe and private.

Download reaConverter

Separate Channels with command-line tool

You can also extract color channels with command-line interface, either manually or through automated scripts. reaConverter Pro includes a command-line tool called cons_rcp.exe — an advanced feature designed for professional use, available exclusively in the Pro edition.

Separate Channels example:

cons_rcp.exe -s "C:\Path_to\input_file.jpg" -o "C:\Path_to\output_file.png" -separate_rgb r g b

Manual

-separate_rgb (separates rgb channels)
  Optional parameters:
  1. Channens (Syntax: r g b)
     where "r", "g", "b" mean red, green, blue
  Example:
    -separate_rgb r g b

-separate_cmyk (separates cmyk channels)
  Optional parameters:
  1. Channens (Syntax: c m y k)
     where "c", "m", "y", "k" mean cyan, magenta, yellow, black
  Example:
    -separate_cmyk c m y k

You are welcome to contact our technical support when you have any questions about reaConverter.