/
goImageBrightnessExample.go
79 lines (69 loc) · 2.55 KB
/
goImageBrightnessExample.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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
package main
import (
"flag"
"log"
"time"
"github.com/rhutzel/goImageBrightness"
)
func main() {
flagSamplingPtr := flag.Bool("sampling", false, "Linear brightness averaging of small image fixture sampling.")
flagLinearPtr := flag.String("linear", "", "Linear brightness averaging of large image.")
flagThreadedPtr := flag.String("threaded", "", "Threaded brightness averaging of large image.")
flag.Parse()
switch {
case *flagSamplingPtr:
doSampling()
return
case len(*flagLinearPtr) > 0:
doLargeLinear(flagLinearPtr)
return
case len(*flagThreadedPtr) > 0:
doLargeThreaded(flagThreadedPtr)
return
}
flag.PrintDefaults()
}
func doSampling() {
img, imgType, err := goImageBrightness.ImageFromFile("sampleImageAllWhite.png")
if err != nil {
log.Fatalf("Failed to decode [%s] image.", imgType)
}
brightnessPercentage := goImageBrightness.AnalyseImage(img)
log.Printf("Total relative luminance is %d%%.", brightnessPercentage)
img, imgType, err = goImageBrightness.ImageFromFile("sampleImageMostlyBrightGreen.png")
if err != nil {
log.Fatalf("Failed to decode [%s] image.", imgType)
}
brightnessPercentage = goImageBrightness.AnalyseImage(img)
log.Printf("Total relative luminance is %d%%.", brightnessPercentage)
img, imgType, err = goImageBrightness.ImageFromFile("sampleImageSlightlyBrightGreen.png")
if err != nil {
log.Fatalf("Failed to decode [%s] image.", imgType)
}
brightnessPercentage = goImageBrightness.AnalyseImage(img)
log.Printf("Total relative luminance is %d%%.", brightnessPercentage)
img, imgType, err = goImageBrightness.ImageFromFile("sampleImageAllBlack.png")
if err != nil {
log.Fatalf("Failed to decode [%s] image.", imgType)
}
brightnessPercentage = goImageBrightness.AnalyseImage(img)
log.Printf("Total relative luminance is %d%%.", brightnessPercentage)
}
func doLargeLinear(pngPath *string) {
start := time.Now()
img, imgType, err := goImageBrightness.ImageFromFile(*pngPath)
if err != nil {
log.Fatalf("Failed to decode [%s] image.", imgType)
}
brightnessPercentage := goImageBrightness.AnalyseImage(img)
log.Printf("Linear total relative luminance is %d%%. (%d ms)", brightnessPercentage, time.Since(start) / 1000000)
}
func doLargeThreaded(pngPath *string) {
start := time.Now()
img, imgType, err := goImageBrightness.ImageFromFile(*pngPath)
if err != nil {
log.Fatalf("Failed to decode [%s] image.", imgType)
}
brightnessPercentage := goImageBrightness.ParallelAnalyseImage(img, 4)
log.Printf("Threaded total relative luminance is %d%%. (%d ms)", brightnessPercentage, time.Since(start) / 1000000)
}