Better auto background detection
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Jay
parent
c63d46a32e
commit
e2472fb9b2
@ -58,92 +58,102 @@ object ImageUtil {
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return ColorDrawable(Color.WHITE)
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val top = 5
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val bot = image.height - 5
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val left = (image.width * 0.025).toInt()
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val left = (image.width * 0.0275).toInt()
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val right = image.width - left
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val midX = image.width / 2
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val midY = image.height / 2
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val topLeftIsDark = isDark(image.getPixel(left,top))
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val topRightIsDark = isDark(image.getPixel(right,top))
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val midLeftIsDark = isDark(image.getPixel(left,midY))
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val midRightIsDark = isDark(image.getPixel(right,midY))
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val topLeftIsDark = isDark(image.getPixel(left, top))
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val topRightIsDark = isDark(image.getPixel(right, top))
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val midLeftIsDark = isDark(image.getPixel(left, midY))
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val midRightIsDark = isDark(image.getPixel(right, midY))
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val topMidIsDark = isDark(image.getPixel(midX, top))
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val botLeftIsDark = isDark(image.getPixel(left,bot))
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val botRightIsDark = isDark(image.getPixel(right,bot))
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val botLeftIsDark = isDark(image.getPixel(left, bot))
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val botRightIsDark = isDark(image.getPixel(right, bot))
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var darkBG = (topLeftIsDark && (botLeftIsDark || botRightIsDark || topRightIsDark || midLeftIsDark || topMidIsDark))
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|| (topRightIsDark && (botRightIsDark || botLeftIsDark || midRightIsDark || topMidIsDark))
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if (pixelIsClose(image.getPixel(left,top), image.getPixel(midX,top)) && // top left & top mid
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pixelIsClose(image.getPixel(midX,top), image.getPixel(right,top)) && //top mid & top right
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pixelIsClose(image.getPixel(right,top), image.getPixel(right,bot)) && // top right & bot right
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pixelIsClose(image.getPixel(right,bot), image.getPixel(midX,bot)) && // bot right & bot mid
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pixelIsClose(image.getPixel(midX,bot), image.getPixel(left,bot))) // bot mid & bot left
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return ColorDrawable(image.getPixel(left,top))
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val blackPixel = when {
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topLeftIsDark -> image.getPixel (left, top)
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topRightIsDark -> image.getPixel(right, top)
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botLeftIsDark ->image.getPixel(left, bot)
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else -> image.getPixel(right, bot)
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}
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if (isWhite(image.getPixel(left,top)).toInt() +
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isWhite(image.getPixel(right,top)).toInt() +
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isWhite(image.getPixel(left,bot)).toInt() +
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isWhite(image.getPixel(right,bot)).toInt() > 2)
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darkBG = false
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var overallWhitePixels = 0
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var overallBlackPixels = 0
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outer@ for (x in intArrayOf(left,right)) {
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var whitePixelsStreak = 0
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var whitePixels = 0
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var blackPixelsStreak = 0
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var blackPixels = 0
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var blackStreak = false
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var whiteStrak = false
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for (y in (0 until image.height step image.height / 25)) {
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val pixel = image.getPixel(x, y)
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if (isWhite(pixel)) {
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if (!isWhite(image.getPixel(left, top)) && pixelIsClose(image.getPixel(left, top), image.getPixel(midX, top)) &&
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!isWhite(image.getPixel(midX, top)) && pixelIsClose(image.getPixel(midX, top), image.getPixel(right, top)) &&
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!isWhite(image.getPixel(right, top)) && pixelIsClose(image.getPixel(right, top), image.getPixel(right, bot)) &&
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!isWhite(image.getPixel(right, bot)) && pixelIsClose(image.getPixel(right, bot), image.getPixel(midX, bot)) &&
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!isWhite(image.getPixel(midX, bot)) && pixelIsClose(image.getPixel(midX, bot), image.getPixel(left, bot)) &&
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!isWhite(image.getPixel(left, bot)) && pixelIsClose(image.getPixel(left, bot), image.getPixel(left, top)))
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return ColorDrawable(image.getPixel(left, top))
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if (isWhite(image.getPixel(left, top)).toInt() +
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isWhite(image.getPixel(right, top)).toInt() +
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isWhite(image.getPixel(left, bot)).toInt() +
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isWhite(image.getPixel(right, bot)).toInt() > 2)
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darkBG = false
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var overallWhitePixels = 0
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var overallBlackPixels = 0
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outer@ for (x in intArrayOf(left, right)) {
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var whitePixelsStreak = 0
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var whitePixels = 0
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var blackPixelsStreak = 0
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var blackPixels = 0
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var blackStreak = false
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var whiteStrak = false
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for (y in (0 until image.height step image.height / 25)) {
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val pixel = image.getPixel(x, y)
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if (isWhite(pixel)) {
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blackPixelsStreak = 0
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whitePixelsStreak++
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whitePixels++
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overallWhitePixels++
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if (whitePixelsStreak > 14) {
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whiteStrak = true
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}
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} else {
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whitePixelsStreak = 0
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if (isDark(pixel)) {
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blackPixels++
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overallBlackPixels++
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blackPixelsStreak++
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if (blackPixelsStreak > 14) {
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blackStreak = true
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}
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} else {
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blackPixelsStreak = 0
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whitePixelsStreak++
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whitePixels++
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overallWhitePixels++
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if (whitePixelsStreak > 14) {
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whiteStrak = true
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}
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}
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else {
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whitePixelsStreak = 0
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if (isDark(pixel)) {
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blackPixels++
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overallBlackPixels++
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blackPixelsStreak++
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if (blackPixelsStreak > 14) {
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blackStreak = true
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}
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}
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else {
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blackPixelsStreak = 0
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}
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}
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}
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when {
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blackPixels > 22 -> { darkBG = true; overallWhitePixels = 0; break@outer }
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blackStreak -> darkBG = true
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whiteStrak || whitePixels > 22 -> darkBG = false
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}
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}
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if (overallWhitePixels > 9 && overallWhitePixels > overallBlackPixels)
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darkBG = false
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if (darkBG)
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{
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if (isWhite(image.getPixel(left,bot)) && isWhite(image.getPixel(right,bot)))
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when {
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blackPixels > 22 -> {
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darkBG = true; overallWhitePixels = 0; break@outer
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}
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blackStreak -> darkBG = true
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whiteStrak || whitePixels > 22 -> darkBG = false
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}
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}
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val blackPixel = when {
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topLeftIsDark -> image.getPixel(left, top)
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topRightIsDark -> image.getPixel(right, top)
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botLeftIsDark -> image.getPixel(left, bot)
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else -> image.getPixel(right, bot)
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}
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if (overallWhitePixels > 9 && overallWhitePixels > overallBlackPixels) {
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darkBG = false
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}
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if (darkBG) {
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if (isWhite(image.getPixel(left, bot)) && isWhite(image.getPixel(right, bot)))
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return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
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intArrayOf(blackPixel, blackPixel, Color.WHITE, Color.WHITE))
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else if (isWhite(image.getPixel(left,top)) && isWhite(image.getPixel(right,top)))
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else if (isWhite(image.getPixel(left, top)) && isWhite(image.getPixel(right, top)))
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return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
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intArrayOf(Color.WHITE, Color.WHITE, blackPixel, blackPixel))
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else
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return ColorDrawable(blackPixel)
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}
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if (topLeftIsDark && topRightIsDark && (topMidIsDark || overallBlackPixels > 9))
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return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
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intArrayOf(blackPixel, blackPixel, Color.WHITE, Color.WHITE))
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else if (botLeftIsDark && botRightIsDark && (isDark(image.getPixel(midX, bot)) || overallBlackPixels > 9))
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return GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
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intArrayOf(Color.WHITE, Color.WHITE, blackPixel, blackPixel))
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return ColorDrawable(Color.WHITE)
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}
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