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Testing threshold values

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esimov
2018-04-16 18:18:14 +03:00
parent 295119f489
commit f06d36908a
1 changed files with 12 additions and 6 deletions
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18
main.go
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@@ -16,9 +16,9 @@ import (
const ( const (
BlockSize int = 4 BlockSize int = 4
MagnitudeThreshold = 0.5 MagnitudeThreshold = 0.2
SymmetryThreshold = 30 SymmetryThreshold = 72
NeighboringBlocksThreshold = 0.5 NeighboringBlocksThreshold = 25
) )
// pixel struct contains the discrete cosine transformation R,G,B,Y values. // pixel struct contains the discrete cosine transformation R,G,B,Y values.
@@ -178,8 +178,12 @@ func main() {
vectors = append(vectors, *result) vectors = append(vectors, *result)
} }
} }
simBlocks := getSuspiciousBlocks(vectors) simBlocks := getSuspiciousBlocks(vectors)
_, result := filterOutNeighbors(simBlocks) _, result := filterOutNeighbors(simBlocks)
//fmt.Println(len(vectors))
//fmt.Println(len(simBlocks))
fmt.Println("\n", result) fmt.Println("\n", result)
fmt.Printf("Features length: %d", len(features)) fmt.Printf("Features length: %d", len(features))
@@ -259,6 +263,7 @@ func getSuspiciousBlocks(vect []vector) newVector {
}) })
} }
} }
fmt.Println(suspiciousBlocks)
return suspiciousBlocks return suspiciousBlocks
} }
@@ -269,8 +274,9 @@ func filterOutNeighbors(vect []vector) (newVector, bool) {
for i := 0; i < len(vect)-1; i++ { for i := 0; i < len(vect)-1; i++ {
blockA, blockB := vect[i], vect[i+1] blockA, blockB := vect[i], vect[i+1]
// Check if two regions are neighbors.
if blockA.xa == blockB.xa-1 && blockA.ya == blockB.ya-1 { // Continue only if two regions are not neighbors.
if blockA.xa != blockB.xa && blockA.ya != blockB.ya {
// Calculate the euclidean distance between both regions. // Calculate the euclidean distance between both regions.
dx := float64(blockA.xa - blockB.xa) dx := float64(blockA.xa - blockB.xa)
dy := float64(blockA.ya - blockB.ya) dy := float64(blockA.ya - blockB.ya)
@@ -278,8 +284,8 @@ func filterOutNeighbors(vect []vector) (newVector, bool) {
// Evaluate the euclidean distance distance between two regions // Evaluate the euclidean distance distance between two regions
// and make sure the distance is greater than a predefined threshold. // and make sure the distance is greater than a predefined threshold.
// TODO verify threshold value
if dist > NeighboringBlocksThreshold { if dist > NeighboringBlocksThreshold {
fmt.Println(dist)
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, vect[i].xa, vect[i].ya, vect[i].xb, vect[i].yb, vect[i].offsetX, vect[i].offsetY,
}) })