First of all

Download the latest portable ImageMagick binaries
- C:\cli\magick_utilities.cmd
- C:\cli\magick_utilities.ps1
- C:\cli\bin\magick.exe
Drag and drop folders of images, or image files over magick_utilities.cmd
- See Usage

Usage

Crop with area
- Read ImageMagick Geometry
- Sample: 400x200+20+80
  - Width: 400px
  - Height: 200px
  - Left: 20px
  - Top: 80px
- Starts from left 20px, select a 400px wide area that ends at 420px
- Starts from top 80px, select a 200px high area that ends at 280px
- Crop the image inside the area
Cut off border
- Read ImageMagick Geometry
- Sample: 400x200
  - Width: 400px
  - Height: 200px
- Cut 400px from both left and right of the image
- Cut 200px from both top and bottom of the image
Convert images
- Image Quality: 1 ~ 100
- Default: 90
- For png, it is compress level, which is 10% quality
Darken images
- Minimum color level: 0 ~ 100
- Default: 30
- The larger number, the darker image