Function format_compare_result

Test/astc_test_image.py:151–193

Format a metrics string for a comparison result. Args: image: The image being tested. reference: The reference result to compare against. result: The test result. Return: The metrics report.

(image: TestImage, reference: Record,
                          result: Record)

def format_compare_result(image: TestImage, reference: Record,
                          result: Record) -> str:
    '''
    Format a metrics string for a comparison result.

    Args:
        image: The image being tested.
        reference: The reference result to compare against.
        result: The test result.

    Return:
        The metrics report.
    '''
    psnr_diff = result.psnr - reference.psnr

    try:
        total_time_rel = reference.total_time / result.total_time
    except ZeroDivisionError:
        total_time_rel = float('NaN')

    try:
        coding_time_rel = reference.coding_time / result.coding_time
    except ZeroDivisionError:
        coding_time_rel = float('NaN')

    name = f'{result.block_size:>5} {result.name}'
    psnr = f'{result.psnr:2.3f} dB ({psnr_diff:1.3f} dB)'
    total_time = f'{result.total_time:.3f} s ({total_time_rel:1.2f}x)'
    coding_time = f'{result.coding_time:.3f} s ({coding_time_rel:1.2f}x)'
    coding_rate = f'{result.coding_rate:.3f} MT/s'
    result_status = determine_result(image, reference, result)

    fields = (
        f'{name:<32}',
        f'{psnr:>22}',
        f'{total_time:>15}',
        f'{coding_time:>15}',
        f'{coding_rate:>11}',
        f'{coding_rate:>11}',
        result_status.name
    )

    return ' | '.join(fields)


def run_test_image(encoder: te.EncoderBase, reference: Optional[ResultSet],