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Visualize the possibile tempered zones

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esimov
2018-04-19 14:00:36 +03:00
parent f77495a2d4
commit ebce2ea02a
1 changed files with 9 additions and 4 deletions
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13
main.go
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@@ -18,7 +18,7 @@ const (
BlockSize int = 4 BlockSize int = 4
DistanceThreshold = 0.4 DistanceThreshold = 0.4
OffsetThreshold = 72 OffsetThreshold = 72
ForgeryThreshold = 220 ForgeryThreshold = 250
) )
var q4x4 = [][]float64{ var q4x4 = [][]float64{
@@ -194,11 +194,16 @@ func main() {
simBlocks := getSuspiciousBlocks(vectors) simBlocks := getSuspiciousBlocks(vectors)
forgedBlocks, result := filterOutNeighbors(simBlocks) forgedBlocks, result := filterOutNeighbors(simBlocks)
forgedImg := image.NewRGBA(img.Bounds())
overlay := color.RGBA{255, 0, 0, 255}
for _, bl := range forgedBlocks { for _, bl := range forgedBlocks {
background := color.RGBA{255, 0, 0, 255} draw.Draw(forgedImg, image.Rect(bl.xa, bl.ya, bl.xa+BlockSize*2, bl.ya+BlockSize*2), &image.Uniform{overlay}, image.ZP, draw.Over)
draw.Draw(output, image.Rect(bl.xa, bl.ya, bl.xa+BlockSize, bl.ya+BlockSize), &image.Uniform{background}, image.ZP, draw.Src)
} }
final := StackBlur(imgToNRGBA(forgedImg), 10)
draw.Draw(output, img.Bounds(), final, image.ZP, draw.Over)
out, err := os.Create("output.png") out, err := os.Create("output.png")
if err != nil { if err != nil {
fmt.Printf("Error creating output file: %v", err) fmt.Printf("Error creating output file: %v", err)
@@ -310,7 +315,7 @@ func filterOutNeighbors(vect []vector) (newVector, bool) {
// and make sure the distance is greater than a predefined threshold. // and make sure the distance is greater than a predefined threshold.
if dist > ForgeryThreshold { if dist > ForgeryThreshold {
forgedBlocks = append(forgedBlocks, vector{ forgedBlocks = append(forgedBlocks, vector{
vect[i].xa, vect[i].ya, vect[i].xb, vect[i].yb, vect[i].offsetX, vect[i].offsetY, blockA.xa, blockA.ya, blockA.xb, blockA.yb, blockA.offsetX, vect[i].offsetY,
}) })
// We need to verify if an image is forged only once. // We need to verify if an image is forged only once.
if !isForged { if !isForged {