godicom/pixel_encode_test.go at main · godicom-dev/godicom · GitHub

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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
package godicom_test

import (
	"bytes"
	"os"
	"path/filepath"
	"testing"

	"github.com/godicom-dev/godicom"
	"github.com/godicom-dev/godicom/pixels"
	"github.com/godicom-dev/godicom/uid"
)

func TestCompressPixelData_RLE_CT_small_roundtrip(t *testing.T) {
	path := filepath.Join("pydicom", "src", "pydicom", "data", "test_files", "CT_small.dcm")
	ds, err := godicom.ReadFile(path, nil)
	if err != nil {
		t.Fatal(err)
	}
	orig, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if err := ds.CompressPixelData(uid.RLELossless); err != nil {
		t.Fatal(err)
	}
	ts, ok := ds.TransferSyntaxUID()
	if !ok || ts != uid.RLELossless {
		t.Fatalf("TS=%q", ts)
	}
	got, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(got, orig) {
		t.Fatalf("RLE roundtrip pixel mismatch: len %d vs %d", len(got), len(orig))
	}

	tmp := filepath.Join(t.TempDir(), "ct_rle.dcm")
	if err := ds.SaveAs(tmp, nil); err != nil {
		t.Fatal(err)
	}
	reread, err := godicom.ReadFile(tmp, nil)
	if err != nil {
		t.Fatal(err)
	}
	got2, err := reread.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(got2, orig) {
		t.Fatal("save/read RLE pixel mismatch")
	}
	info, err := os.Stat(tmp)
	if err != nil {
		t.Fatal(err)
	}
	if info.Size() == 0 {
		t.Fatal("empty output file")
	}
}

func TestCompressPixelData_JPEGLSLossless_CT_small(t *testing.T) {
	path := filepath.Join("pydicom", "src", "pydicom", "data", "test_files", "CT_small.dcm")
	ds, err := godicom.ReadFile(path, nil)
	if err != nil {
		t.Fatal(err)
	}
	orig, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if err := ds.CompressPixelData(uid.JPEGLSLossless); err != nil {
		skipWithoutNativeCodec(t, err)
		t.Fatal(err)
	}
	ts, ok := ds.TransferSyntaxUID()
	if !ok || ts != uid.JPEGLSLossless {
		t.Fatalf("TS=%q", ts)
	}
	got, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(got, orig) {
		t.Fatalf("JPEG-LS lossless roundtrip mismatch: %d vs %d", len(got), len(orig))
	}
}

func TestCompressPixelData_JPEGLossless_CT_small(t *testing.T) {
	path := filepath.Join("pydicom", "src", "pydicom", "data", "test_files", "CT_small.dcm")
	ds, err := godicom.ReadFile(path, nil)
	if err != nil {
		t.Fatal(err)
	}
	orig, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if err := ds.CompressPixelData(uid.JPEGLossless); err != nil {
		skipWithoutNativeCodec(t, err)
		t.Fatal(err)
	}
	got, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(got, orig) {
		t.Fatalf("JPEG lossless roundtrip mismatch: %d vs %d", len(got), len(orig))
	}
}

func TestCompressPixelData_Deflated_MR_small(t *testing.T) {
	path := filepath.Join("pydicom", "src", "pydicom", "data", "test_files", "MR_small.dcm")
	ds, err := godicom.ReadFile(path, nil)
	if err != nil {
		t.Fatal(err)
	}
	orig, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if err := ds.CompressPixelData(uid.DeflatedImageFrameCompression); err != nil {
		t.Fatal(err)
	}
	got, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(got, orig) {
		t.Fatal("deflated frame roundtrip mismatch")
	}
}

func TestCompressPixelData_J2KLossless_CT_small(t *testing.T) {
	path := filepath.Join("pydicom", "src", "pydicom", "data", "test_files", "CT_small.dcm")
	ds, err := godicom.ReadFile(path, nil)
	if err != nil {
		t.Fatal(err)
	}
	orig, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if err := ds.CompressPixelData(uid.JPEG2000Lossless); err != nil {
		skipWithoutNativeCodec(t, err)
		t.Fatal(err)
	}
	ts, ok := ds.TransferSyntaxUID()
	if !ok || ts != uid.JPEG2000Lossless {
		t.Fatalf("TS=%q", ts)
	}
	got, err := ds.PixelBytes(pixels.WithRaw(true))
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(got, orig) {
		t.Fatalf("J2K lossless roundtrip mismatch: %d vs %d", len(got), len(orig))
	}
}