diff --git a/app/src/androidTest/java/org/mydomain/myscan/DocumentDetectionTest.kt b/app/src/androidTest/java/org/mydomain/myscan/DocumentDetectionTest.kt
new file mode 100644
index 0000000..e8eb4f6
--- /dev/null
+++ b/app/src/androidTest/java/org/mydomain/myscan/DocumentDetectionTest.kt
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2025 Pierre-Yves Nicolas
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.mydomain.myscan
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.util.Log
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+import org.opencv.android.OpenCVLoader
+import java.io.File
+import java.io.FileOutputStream
+
+@RunWith(AndroidJUnit4::class)
+class DocumentDetectionTest {
+    @Test
+    fun extractDocumentFromImage() {
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("org.mydomain.myscan", appContext.packageName)
+
+        val context = ApplicationProvider.getApplicationContext<Context>()
+        val segmentationService = ImageSegmentationService(context)
+        segmentationService.initialize()
+        OpenCVLoader.initLocal()
+
+        listOf("img01.jpg", "img02.jpg", "img03.jpg").forEach { imageFileName ->
+            val inputStream = context.assets.open("uncropped/$imageFileName")
+            val bitmap = BitmapFactory.decodeStream(inputStream)
+            var outputBitmap: Bitmap? = null
+
+            val segmentationResult = segmentationService.runSegmentationAndReturn(bitmap, 0)
+            if (segmentationResult != null) {
+                val mask = segmentationResult.segmentation.toBinaryMask()
+                val quad = detectDocumentQuad(mask)
+                if (quad != null) {
+                    val resizedQuad =
+                        quad.scaledTo(mask.width, mask.height, bitmap.width, bitmap.height)
+                    outputBitmap = extractDocument(bitmap, resizedQuad)
+                    val file = File(context.getExternalFilesDir(null), imageFileName)
+                    FileOutputStream(file).use {
+                        outputBitmap.compress(Bitmap.CompressFormat.JPEG, 95, it)
+                    }
+                    Log.i("DocumentDetectionTest", "Image saved to ${file.absolutePath}")
+                }
+            }
+            if (outputBitmap == null) {
+                fail("Failed to extract document from image $imageFileName")
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/androidTest/java/org/mydomain/myscan/ExampleInstrumentedTest.kt b/app/src/androidTest/java/org/mydomain/myscan/ExampleInstrumentedTest.kt
deleted file mode 100644
index cc9892e..0000000
--- a/app/src/androidTest/java/org/mydomain/myscan/ExampleInstrumentedTest.kt
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2025 Pierre-Yves Nicolas
- *
- * This program is free software: you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation, either version 3 of the License, or (at your option)
- * any later version.
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- * You should have received a copy of the GNU General Public License along with
- * this program. If not, see <https://www.gnu.org/licenses/>.
- */
-package org.mydomain.myscan
-
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.ext.junit.runners.AndroidJUnit4
-
-import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-@RunWith(AndroidJUnit4::class)
-class ExampleInstrumentedTest {
-    @Test
-    fun useAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("org.mydomain.myscan", appContext.packageName)
-    }
-}
\ No newline at end of file
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