| // Copyright 2018 Google Inc. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at: |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| /// Parameters that determine the mapping of quantized values to real values. Quantized values can |
| /// be mapped to float values using the following conversion: |
| /// `realValue = scale * (quantizedValue - zeroPoint)`. |
| public struct QuantizationParameters: Equatable, Hashable { |
| /// Difference between real values corresponding to consecutive quantized values differing by 1. |
| /// For example, the range of quantized values for `UInt8` data type is [0, 255]. |
| public let scale: Float |
| |
| /// Quantized value that corresponds to the real 0 value. |
| public let zeroPoint: Int |
| |
| /// Creates a new quantization parameters instance. |
| /// |
| /// - Parameters: |
| /// - scale: Scale value for asymmetric quantization. |
| /// - zeroPoint: Zero point for asymmetric quantization. |
| init(scale: Float, zeroPoint: Int) { |
| self.scale = scale |
| self.zeroPoint = zeroPoint |
| } |
| } |
