-
Notifications
You must be signed in to change notification settings - Fork 9
Expand file tree
/
Copy pathExtensions.cs
More file actions
126 lines (114 loc) · 4.54 KB
/
Extensions.cs
File metadata and controls
126 lines (114 loc) · 4.54 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
// Copyright (c) TensorStack. All rights reserved.
// Licensed under the Apache 2.0 License.
using System.Drawing;
using System.Drawing.Imaging;
using System.Threading.Tasks;
using TensorStack.Common;
using TensorStack.Common.Tensor;
namespace TensorStack.Image
{
public static class Extensions
{
/// <summary>
/// Converts ImageTensor to Bitmap.
/// </summary>
/// <param name="imageTensor">The image tensor.</param>
/// <returns>Bitmap.</returns>
public static Bitmap ToImage(this ImageTensor imageTensor)
{
return imageTensor.ToBitmapImage();
}
/// <summary>
/// Converts ImageTensorBase to ImageTensor.
/// </summary>
/// <param name="imageTensor">The image tensor.</param>
/// <returns>ImageTensor.</returns>
public static ImageInput ToImageInput(this ImageTensor imageTensor)
{
return new ImageInput(imageTensor);
}
/// <summary>
/// Saves the ImageTensor.
/// </summary>
/// <param name="imageTensor">The image tensor.</param>
/// <param name="filename">The filename.</param>
/// <returns>Task.</returns>
public static Task SaveAsync(this ImageTensor imageTensor, string filename)
{
return Task.Run(() =>
{
using (var image = imageTensor.ToImageInput())
{
image.Save(filename);
}
});
}
/// <summary>
/// Saves the ImageInput.
/// </summary>
/// <param name="imageTensor">The image tensor.</param>
/// <param name="filename">The filename.</param>
/// <returns>Task.</returns>
public static Task SaveAsync(this ImageInput imageTensor, string filename)
{
return Task.Run(() => imageTensor.Save(filename));
}
/// <summary>
/// Converts Bitmap to Tensor.
/// </summary>
/// <param name="bitmap">The bitmap.</param>
/// <returns>Tensor<System.Single>.</returns>
internal static ImageTensor ToTensor(this Bitmap bitmap)
{
var width = bitmap.Width;
var height = bitmap.Height;
bitmap.ConvertFormat(PixelFormat.Format32bppArgb);
var tensor = new ImageTensor(height, width);
var bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
unsafe
{
for (int y = 0; y < height; y++)
{
byte* pixelRow = (byte*)bitmapData.Scan0 + (y * bitmapData.Stride);
for (int x = 0; x < width; x++)
{
tensor[0, 3, y, x] = pixelRow[x * 4 + 3].NormalizeToFloat(); // A
tensor[0, 0, y, x] = pixelRow[x * 4 + 2].NormalizeToFloat(); // R
tensor[0, 1, y, x] = pixelRow[x * 4 + 1].NormalizeToFloat(); // G
tensor[0, 2, y, x] = pixelRow[x * 4 + 0].NormalizeToFloat(); // B
}
}
bitmap.UnlockBits(bitmapData);
}
return tensor;
}
/// <summary>
/// Converts Tensor to Bitmap.
/// </summary>
/// <param name="tensor">The tensor.</param>
/// <returns>Bitmap.</returns>
internal static Bitmap ToBitmapImage(this ImageTensor tensor)
{
var height = tensor.Dimensions[2];
var width = tensor.Dimensions[3];
var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
var bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
unsafe
{
for (int y = 0; y < height; y++)
{
byte* pixelRow = (byte*)bitmapData.Scan0 + (y * bitmapData.Stride);
for (int x = 0; x < width; x++)
{
pixelRow[x * 4 + 0] = tensor[0, 2, y, x].DenormalizeToByte(); // B
pixelRow[x * 4 + 1] = tensor[0, 1, y, x].DenormalizeToByte(); // G
pixelRow[x * 4 + 2] = tensor[0, 0, y, x].DenormalizeToByte(); // R
pixelRow[x * 4 + 3] = tensor[0, 3, y, x].DenormalizeToByte(); // A
}
}
}
bitmap.UnlockBits(bitmapData);
return bitmap;
}
}
}