{
  "context": "This criteria evaluates how effectively the engineer uses the pillow-heif package to save images in HEIF and AVIF formats. It focuses on proper use of the package's encoding capabilities, quality control features, and format selection options.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Pillow Integration",
      "description": "Uses pillow-heif's Pillow plugin integration (e.g., register_heif_opener() or from pillow_heif import register_heif_opener) to enable HEIF/AVIF saving through PIL.Image.save()",
      "max_score": 25
    },
    {
      "name": "Format Selection",
      "description": "Correctly specifies the output format using the 'format' parameter in save() method (format='HEIF' or format='AVIF') or uses from_pillow() with appropriate format specification",
      "max_score": 20
    },
    {
      "name": "Quality Control",
      "description": "Implements quality control using the 'quality' parameter in the save() method, supporting values from 0-100 and handling the special lossless case (quality=-1)",
      "max_score": 20
    },
    {
      "name": "Lossless Encoding",
      "description": "Properly configures lossless encoding when quality=-1 by also setting appropriate parameters like chroma=444 and matrix_coefficients=0 for true lossless output",
      "max_score": 15
    },
    {
      "name": "Alpha Channel",
      "description": "Preserves alpha channel information by ensuring images with transparency maintain their alpha channel during conversion (RGBA mode support)",
      "max_score": 10
    },
    {
      "name": "File Handling",
      "description": "Uses appropriate image opening methods (PIL.Image.open() or pillow_heif.open_heif()) and properly saves to the output path using the save() method",
      "max_score": 10
    }
  ]
}