Hi neophyte1,
Some meanings for parameters are as below.
initial_weight (float): Initial weight that will be assigned to this objective's cost.
weight_target (float): Target weight that will be assigned to this objective's cost.
class_weight (float): Weight assigned to this target class's cost (all objectives combined).
coverage_foreground_weight (float): Relative weight associated with the cost of cells where there is a foreground instance (i.e. the presence of what this TargetClass represents).Value should be in the range (0,1)
objectives (list): Each item is a cost_function_parameters.Objective instance which contains the cost configuration options for this target class's objectives.