@imgsplit/cli

Install

npm install -g @imgsplit/cli

Usage

Split by Height

Split an image into sections of 256px height (output to default directory):

imgsplit ./xxx.png --height 256

Specify a custom output directory:

imgsplit ./xxx.png --height 256 ./savepath/

Split by Count

Divide an image into 10 equal parts (output to default directory):

imgsplit ./xxx.png --count 10

Split by Custom Regions

Define specific regions using x,y,width,height coordinates (output to default directory):

imgsplit ./xxx.png --item 0,0,512,512 --item 0,512,512,256

Example coordinates:

0,0,512,512: Starts at top-left corner (0,0), creates a 512x512 section

0,512,512,256: Starts at (0,512), creates a 512x256 section

Coordinate Format:

The --item flag supports three parameter patterns:

1. Vertical Splits with Dynamic Height

--item <y>

• First to second-last y: Height = next_y - current_y

• Last y: Height = total_image_height - current_y

• Example:
  For an image with height 4096px:
  imgsplit ./xxx.png --item 512 --item 1024

  1. Region 1:
     • Start: Y=512
     • Height: 1024 - 512 = 512px
     • Covers Y=512 to Y=1024
  2. Region 2:
     • Start: Y=1024
     • Height: 4096 - 1024 = 3072px
     • Covers Y=1024 to Y=4096

2. Height-Based Region

--item <y>,<height>

• Defines a region starting at y with the specified height (full width used).
• Example: --item 200,100 → Creates a 100px-tall region starting at Y=200.

3. Custom Rectangle

--item <x>,<y>,<width>,<height>

• Defines a rectangle region with explicit coordinates.
• Example: --item 50,100,400,300 → Starts at (50,100), creates a 400x300 region.

Key Notes:

• Default output directory: ./${imgname}-splitted/ (automatically created if missing)
• Supported image formats: PNG, JPG. (Other formats will be automatically saved as PNG)
• Use --help to see all options:imgsplit --help