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# Copyright 2020 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import gold_inexact_matching.base_parameter_optimizer as base_optimizer
from gold_inexact_matching import common_typing as ct
# This is an abstract class itself, so it's fine that it doesn't implement
# all of BaseParameterOptimizer's abstract methods.
# pylint: disable=abstract-method
class IterativeParameterOptimizer(base_optimizer.BaseParameterOptimizer):
"""Abstract ParameterOptimizer class for running an iterative algorithm."""
MIN_EDGE_THRESHOLD_STEP = 0
MAX_EDGE_THRESHOLD_STEP = (
base_optimizer.BaseParameterOptimizer.MAX_EDGE_THRESHOLD)
MIN_MAX_DIFF_STEP = MIN_DELTA_THRESHOLD_STEP = 0
MAX_DELTA_THRESHOLD_STEP = (
base_optimizer.BaseParameterOptimizer.MAX_DELTA_THRESHOLD)
@classmethod
def AddArguments(cls, parser: ct.CmdArgParser) -> ct.ArgumentGroupTuple:
common_group, sobel_group, fuzzy_group = super(IterativeParameterOptimizer,
cls).AddArguments(parser)
sobel_group.add_argument(
'--edge-threshold-step',
default=10,
type=int,
help='The amount to change the Sobel edge threshold on each iteration.')
fuzzy_group.add_argument(
'--max-diff-step',
default=10,
type=int,
help='The amount to change the fuzzy diff maximum number of different '
'pixels on each iteration.')
fuzzy_group.add_argument(
'--delta-threshold-step',
default=5,
type=int,
help='The amount to change the fuzzy diff per-channel delta sum '
'threshold on each iteration.')
return common_group, sobel_group, fuzzy_group
def _VerifyArgs(self) -> None:
super()._VerifyArgs()
assert self._args.edge_threshold_step >= self.MIN_EDGE_THRESHOLD_STEP
assert self._args.edge_threshold_step <= self.MAX_EDGE_THRESHOLD_STEP
assert self._args.max_diff_step >= self.MIN_MAX_DIFF_STEP
assert self._args.delta_threshold_step >= self.MIN_DELTA_THRESHOLD_STEP
#pylint: enable=abstract-method
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