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36 lines
1.1 KiB
36 lines
1.1 KiB
package com.sothr.imagetools.hash
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import grizzled.slf4j.Logging
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/**
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* Created by dev on 1/22/14.
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*/
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object DHash extends PerceptualHasher with Logging {
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def getHash(imageData: Array[Array[Int]]): Long = {
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debug("Generating DHash")
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val width = imageData.length
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val height = imageData(0).length
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debug(s"Image data size: ${width}x${height}")
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var hash = 0L
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for (row <- 0 until width) {
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//println(f"Row: $row%d")
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var previousPixel = imageData(row)(0)
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var previousLocation = (row, 0)
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//process each column
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for (col <- 0 until height) {
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debug(s"previousPixel: $previousPixel previousLocation: $previousLocation")
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//println(f"Column: $col%d")
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hash <<= 1
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val pixel = imageData(row)(col)
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//binary or the current bit based on whether the value
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//of the current pixel is greater or equal to the previous pixel
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if (pixel >= previousPixel) hash |= 1 else hash |= 0
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debug(s"hash: hash")
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previousPixel = pixel
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previousLocation = (row, col)
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}
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}
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hash
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}
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}
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