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https://gitee.com/akwkevin/aistudio.-wpf.-diagram
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104 lines
4.2 KiB
C#
104 lines
4.2 KiB
C#
/*
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* Copyright 2009 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using ZXing.Common;
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namespace ZXing
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{
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/// <summary> This class hierarchy provides a set of methods to convert luminance data to 1 bit data.
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/// It allows the algorithm to vary polymorphically, for example allowing a very expensive
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/// thresholding technique for servers and a fast one for mobile. It also permits the implementation
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/// to vary, e.g. a JNI version for Android and a Java fallback version for other platforms.
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///
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/// <author>dswitkin@google.com (Daniel Switkin)</author>
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/// </summary>
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public abstract class Binarizer
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{
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private readonly LuminanceSource source;
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/// <summary>
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/// Initializes a new instance of the <see cref="Binarizer"/> class.
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/// </summary>
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/// <param name="source">The source.</param>
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protected internal Binarizer(LuminanceSource source)
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{
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if (source == null)
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{
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throw new ArgumentException("Source must be non-null.");
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}
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this.source = source;
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}
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/// <summary>
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/// Gets the luminance source object.
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/// </summary>
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virtual public LuminanceSource LuminanceSource
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{
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get
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{
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return source;
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}
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}
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/// <summary> Converts one row of luminance data to 1 bit data. May actually do the conversion, or return
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/// cached data. Callers should assume this method is expensive and call it as seldom as possible.
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/// This method is intended for decoding 1D barcodes and may choose to apply sharpening.
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/// For callers which only examine one row of pixels at a time, the same BitArray should be reused
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/// and passed in with each call for performance. However it is legal to keep more than one row
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/// at a time if needed.
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/// </summary>
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/// <param name="y">The row to fetch, which must be in [0, bitmap height)</param>
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/// <param name="row">An optional preallocated array. If null or too small, it will be ignored.
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/// If used, the Binarizer will call BitArray.clear(). Always use the returned object.
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/// </param>
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/// <returns> The array of bits for this row (true means black).</returns>
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public abstract BitArray getBlackRow(int y, BitArray row);
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/// <summary> Converts a 2D array of luminance data to 1 bit data. As above, assume this method is expensive
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/// and do not call it repeatedly. This method is intended for decoding 2D barcodes and may or
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/// may not apply sharpening. Therefore, a row from this matrix may not be identical to one
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/// fetched using getBlackRow(), so don't mix and match between them.
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/// </summary>
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/// <returns> The 2D array of bits for the image (true means black).</returns>
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public abstract BitMatrix BlackMatrix { get; }
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/// <summary> Creates a new object with the same type as this Binarizer implementation, but with pristine
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/// state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache
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/// of 1 bit data. See Effective Java for why we can't use Java's clone() method.
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/// </summary>
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/// <param name="source">The LuminanceSource this Binarizer will operate on.</param>
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/// <returns> A new concrete Binarizer implementation object.</returns>
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public abstract Binarizer createBinarizer(LuminanceSource source);
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/// <summary>
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/// Gets the width of the luminance source object.
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/// </summary>
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public int Width
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{
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get { return source.Width; }
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}
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/// <summary>
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/// Gets the height of the luminance source object.
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/// </summary>
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public int Height
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{
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get { return source.Height; }
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}
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}
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} |
