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Store page metadata after capture

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This commit is contained in:
Pierre-Yves Nicolas
2026-01-09 15:24:15 +01:00
parent 0439971e57
commit fcdcea1891
11 changed files with 198 additions and 64 deletions
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21
imageprocessing/src/main/java/org/fairscan/imageprocessing/DocumentDetection.kt
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@@ -32,6 +32,15 @@ interface Mask {
fun toMat(): Mat
}
data class PageAnalysis(
val isColored: Boolean,
)
data class ExtractedDocument(
val image: Mat,
val pageAnalysis: PageAnalysis,
)
fun detectDocumentQuad(mask: Mask, isLiveAnalysis: Boolean, minQuadAreaRatio: Double = 0.02): Quad? {
val mat = mask.toMat()
val (biggest: MatOfPoint2f?, area) = biggestContour(mat)
@@ -117,7 +126,7 @@ fun extractDocument(
quad: Quad,
rotationDegrees: Int,
mask: Mask,
): Mat {
): ExtractedDocument {
val widthTop = norm(quad.topLeft, quad.topRight)
val widthBottom = norm(quad.bottomLeft, quad.bottomRight)
val targetWidth = (widthTop + widthBottom) / 2
@@ -134,14 +143,14 @@ fun extractDocument(
)
val dstPoints = MatOfPoint2f(
org.opencv.core.Point(0.0, 0.0),
org.opencv.core.Point(targetWidth.toDouble(), 0.0),
org.opencv.core.Point(targetWidth.toDouble(), targetHeight.toDouble()),
org.opencv.core.Point(0.0, targetHeight.toDouble())
org.opencv.core.Point(targetWidth, 0.0),
org.opencv.core.Point(targetWidth, targetHeight),
org.opencv.core.Point(0.0, targetHeight)
)
val transform = Imgproc.getPerspectiveTransform(srcPoints, dstPoints)
val outputMat = Mat()
val outputSize = Size(targetWidth.toDouble(), targetHeight.toDouble())
val outputSize = Size(targetWidth, targetHeight)
Imgproc.warpPerspective(inputMat, outputMat, transform, outputSize)
val resized = resize(outputMat, 1500.0)
@@ -149,7 +158,7 @@ fun extractDocument(
val enhanced = enhanceCapturedImage(resized, isColored)
val rotated = rotate(enhanced, rotationDegrees)
return rotated
return ExtractedDocument(rotated, PageAnalysis(isColored))
}
fun resize(original: Mat, targetMax: Double): Mat {