/
image.go
59 lines (51 loc) · 1.32 KB
/
image.go
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
package utils
import (
"errors"
"fmt"
"github.com/okieraised/gotritron/opencv"
"image/jpeg"
"os"
)
// ConvertImageToOpenCV converts the raw image into OpenCV Matrix
func ConvertImageToOpenCV(bImage []byte) (*opencv.Mat, error) {
dstMat := opencv.Mat{}
srcMat, err := opencv.IMDecode(bImage, opencv.IMReadUnchanged)
if err != nil {
return &opencv.Mat{}, err
}
// Add the rows, columns, and number of channel to the dimension
dimension := []int{}
dimension = append(dimension, srcMat.Size()...)
dimension = append(dimension, srcMat.Channels())
if len(dimension) < 3 {
return &dstMat, errors.New(fmt.Sprintf("invalid number of dimension: %d", len(dimension)))
}
if dimension[2] == 4 { // RGBA
opencv.CvtColor(srcMat, &dstMat, opencv.ColorBGRAToBGR)
} else if dimension[2] == 1 { // Grayscale
opencv.CvtColor(srcMat, &dstMat, opencv.ColorGrayToBGR)
} else {
dstMat = srcMat
}
return &dstMat, nil
}
func OpenCVImageToJPEG(fPath string, jpegQuality int, opencvImg opencv.Mat) error {
outImg, err := opencvImg.ToImage()
if err != nil {
return err
}
f, err := os.Create(fPath)
if err != nil {
return err
}
defer f.Close()
// Specify the quality, between 0-100. Higher is better
opt := jpeg.Options{
Quality: jpegQuality,
}
err = jpeg.Encode(f, outImg, &opt)
if err != nil {
return err
}
return nil
}