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Better auto background detection

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pull/2497/head
Jay 6 years ago
parent c63d46a32e
commit e2472fb9b2
1 changed files with 75 additions and 65 deletions
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140
app/src/main/java/eu/kanade/tachiyomi/util/ImageUtil.kt
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@ -58,92 +58,102 @@ object ImageUtil {
return ColorDrawable(Color.WHITE) return ColorDrawable(Color.WHITE)
val top = 5 val top = 5
val bot = image.height - 5 val bot = image.height - 5
val left = (image.width * 0.025).toInt() val left = (image.width * 0.0275).toInt()
val right = image.width - left val right = image.width - left
val midX = image.width / 2 val midX = image.width / 2
val midY = image.height / 2 val midY = image.height / 2
val topLeftIsDark = isDark(image.getPixel(left,top)) val topLeftIsDark = isDark(image.getPixel(left, top))
val topRightIsDark = isDark(image.getPixel(right,top)) val topRightIsDark = isDark(image.getPixel(right, top))
val midLeftIsDark = isDark(image.getPixel(left,midY)) val midLeftIsDark = isDark(image.getPixel(left, midY))
val midRightIsDark = isDark(image.getPixel(right,midY)) val midRightIsDark = isDark(image.getPixel(right, midY))
val topMidIsDark = isDark(image.getPixel(midX, top)) val topMidIsDark = isDark(image.getPixel(midX, top))
val botLeftIsDark = isDark(image.getPixel(left,bot)) val botLeftIsDark = isDark(image.getPixel(left, bot))
val botRightIsDark = isDark(image.getPixel(right,bot)) val botRightIsDark = isDark(image.getPixel(right, bot))
var darkBG = (topLeftIsDark && (botLeftIsDark || botRightIsDark || topRightIsDark || midLeftIsDark || topMidIsDark)) var darkBG = (topLeftIsDark && (botLeftIsDark || botRightIsDark || topRightIsDark || midLeftIsDark || topMidIsDark))
|| (topRightIsDark && (botRightIsDark || botLeftIsDark || midRightIsDark || topMidIsDark)) || (topRightIsDark && (botRightIsDark || botLeftIsDark || midRightIsDark || topMidIsDark))
if (pixelIsClose(image.getPixel(left,top), image.getPixel(midX,top)) && // top left & top mid
pixelIsClose(image.getPixel(midX,top), image.getPixel(right,top)) && //top mid & top right
pixelIsClose(image.getPixel(right,top), image.getPixel(right,bot)) && // top right & bot right
pixelIsClose(image.getPixel(right,bot), image.getPixel(midX,bot)) && // bot right & bot mid
pixelIsClose(image.getPixel(midX,bot), image.getPixel(left,bot))) // bot mid & bot left
return ColorDrawable(image.getPixel(left,top))
val blackPixel = when {
topLeftIsDark -> image.getPixel (left, top)
topRightIsDark -> image.getPixel(right, top)
botLeftIsDark ->image.getPixel(left, bot)
else -> image.getPixel(right, bot)
}
if (isWhite(image.getPixel(left,top)).toInt() + if (!isWhite(image.getPixel(left, top)) && pixelIsClose(image.getPixel(left, top), image.getPixel(midX, top)) &&
isWhite(image.getPixel(right,top)).toInt() + !isWhite(image.getPixel(midX, top)) && pixelIsClose(image.getPixel(midX, top), image.getPixel(right, top)) &&
isWhite(image.getPixel(left,bot)).toInt() + !isWhite(image.getPixel(right, top)) && pixelIsClose(image.getPixel(right, top), image.getPixel(right, bot)) &&
isWhite(image.getPixel(right,bot)).toInt() > 2) !isWhite(image.getPixel(right, bot)) && pixelIsClose(image.getPixel(right, bot), image.getPixel(midX, bot)) &&
darkBG = false !isWhite(image.getPixel(midX, bot)) && pixelIsClose(image.getPixel(midX, bot), image.getPixel(left, bot)) &&
var overallWhitePixels = 0 !isWhite(image.getPixel(left, bot)) && pixelIsClose(image.getPixel(left, bot), image.getPixel(left, top)))
var overallBlackPixels = 0 return ColorDrawable(image.getPixel(left, top))
outer@ for (x in intArrayOf(left,right)) {
var whitePixelsStreak = 0 if (isWhite(image.getPixel(left, top)).toInt() +
var whitePixels = 0 isWhite(image.getPixel(right, top)).toInt() +
var blackPixelsStreak = 0 isWhite(image.getPixel(left, bot)).toInt() +
var blackPixels = 0 isWhite(image.getPixel(right, bot)).toInt() > 2)
var blackStreak = false darkBG = false
var whiteStrak = false
for (y in (0 until image.height step image.height / 25)) { var overallWhitePixels = 0
val pixel = image.getPixel(x, y) var overallBlackPixels = 0
if (isWhite(pixel)) { outer@ for (x in intArrayOf(left, right)) {
blackPixelsStreak = 0 var whitePixelsStreak = 0
whitePixelsStreak++ var whitePixels = 0
whitePixels++ var blackPixelsStreak = 0
overallWhitePixels++ var blackPixels = 0
if (whitePixelsStreak > 14) { var blackStreak = false
whiteStrak = true var whiteStrak = false
} for (y in (0 until image.height step image.height / 25)) {
val pixel = image.getPixel(x, y)
if (isWhite(pixel)) {
blackPixelsStreak = 0
whitePixelsStreak++
whitePixels++
overallWhitePixels++
if (whitePixelsStreak > 14) {
whiteStrak = true
} }
else { } else {
whitePixelsStreak = 0 whitePixelsStreak = 0
if (isDark(pixel)) { if (isDark(pixel)) {
blackPixels++ blackPixels++
overallBlackPixels++ overallBlackPixels++
blackPixelsStreak++ blackPixelsStreak++
if (blackPixelsStreak > 14) { if (blackPixelsStreak > 14) {
blackStreak = true blackStreak = true
}
}
else {
blackPixelsStreak = 0
} }
} else {
blackPixelsStreak = 0
} }
} }
when { }
blackPixels > 22 -> { darkBG = true; overallWhitePixels = 0; break@outer } when {
blackStreak -> darkBG = true blackPixels > 22 -> {
whiteStrak || whitePixels > 22 -> darkBG = false darkBG = true; overallWhitePixels = 0; break@outer
} }
blackStreak -> darkBG = true
whiteStrak || whitePixels > 22 -> darkBG = false
} }
if (overallWhitePixels > 9 && overallWhitePixels > overallBlackPixels) }
darkBG = false
if (darkBG) val blackPixel = when {
{ topLeftIsDark -> image.getPixel(left, top)
if (isWhite(image.getPixel(left,bot)) && isWhite(image.getPixel(right,bot))) topRightIsDark -> image.getPixel(right, top)
botLeftIsDark -> image.getPixel(left, bot)
else -> image.getPixel(right, bot)
}
if (overallWhitePixels > 9 && overallWhitePixels > overallBlackPixels) {
darkBG = false
}
if (darkBG) {
if (isWhite(image.getPixel(left, bot)) && isWhite(image.getPixel(right, bot)))
return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
intArrayOf(blackPixel, blackPixel, Color.WHITE, Color.WHITE)) intArrayOf(blackPixel, blackPixel, Color.WHITE, Color.WHITE))
else if (isWhite(image.getPixel(left,top)) && isWhite(image.getPixel(right,top))) else if (isWhite(image.getPixel(left, top)) && isWhite(image.getPixel(right, top)))
return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
intArrayOf(Color.WHITE, Color.WHITE, blackPixel, blackPixel)) intArrayOf(Color.WHITE, Color.WHITE, blackPixel, blackPixel))
else else
return ColorDrawable(blackPixel) return ColorDrawable(blackPixel)
} }
if (topLeftIsDark && topRightIsDark && (topMidIsDark || overallBlackPixels > 9))
return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
intArrayOf(blackPixel, blackPixel, Color.WHITE, Color.WHITE))
else if (botLeftIsDark && botRightIsDark && (isDark(image.getPixel(midX, bot)) || overallBlackPixels > 9))
return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
intArrayOf(Color.WHITE, Color.WHITE, blackPixel, blackPixel))
return ColorDrawable(Color.WHITE) return ColorDrawable(Color.WHITE)
} }

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