diff --git a/.gitignore b/.gitignore
index 0e29822..ba93173 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,71 +1,6 @@
-# Built application files
-*.apk
-*.ap_
-*.aab
+# Ignore Windows reserved files
+NUL
 
-# Files for the ART/Dalvik VM
-*.dex
-
-# Java class files
-*.class
-
-# Generated files
-bin/
-gen/
-out/
-
-# Gradle files
+# Android/ Gradle build outputs (optional for CI, can be kept locally if desired)
+**/build/
 .gradle/
-build/
-
-# Local configuration file (sdk path, etc)
-local.properties
-
-# Proguard folder generated by Eclipse
-proguard/
-
-# Log Files
-*.log
-
-# Android Studio Navigation editor temp files
-.navigation/
-
-# Android Studio captures folder
-captures/
-
-# IntelliJ
-*.iml
-.idea/
-
-# Keystore files
-*.jks
-*.keystore
-
-# External native build folder generated in Android Studio 2.2 and later
-.externalNativeBuild
-.cxx/
-
-# Google Services (API key)
-google-services.json
-
-# Freeline
-freeline.py
-freeline/
-freeline_project_description.json
-
-# fastjson
-fastjson/
-
-# Test folder
-test/
-tests/
-
-# Python
-__pycache__/
-*.py[cod]
-*$py.class
-
-# Airtest
-*.log
-*.png
-report/
diff --git a/app/src/main/java/com/inspection/camera/util/PuzzleMerge.kt b/app/src/main/java/com/inspection/camera/util/PuzzleMerge.kt
new file mode 100644
index 0000000..df0f363
--- /dev/null
+++ b/app/src/main/java/com/inspection/camera/util/PuzzleMerge.kt
@@ -0,0 +1,59 @@
+package com.inspection.camera.util
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.Rect
+import android.net.Uri
+
+object PuzzleMerge {
+    // Merge up to 4 images into a single 2x2 bitmap
+    fun mergeToBitmap(context: Context, imageUris: List<Uri>, targetSize: Int = 1000): Bitmap? {
+        if (imageUris.isEmpty()) return null
+        val size = targetSize
+        val half = size / 2
+        val merged = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888)
+        val canvas = Canvas(merged)
+        val paint = Paint(Paint.ANTI_ALIAS_FLAG)
+
+        val targets = arrayOf(
+            Rect(0, 0, half, half),        // TL
+            Rect(half, 0, size, half),     // TR
+            Rect(0, half, half, size),     // BL
+            Rect(half, half, size, size)    // BR
+        )
+
+        val toUse = imageUris.take(4)
+        for (i in toUse.indices) {
+            val bmp = loadBitmap(context, toUse[i], half, half)
+            if (bmp != null) {
+                val scaled = Bitmap.createScaledBitmap(bmp, half, half, true)
+                canvas.drawBitmap(scaled, null, targets[i], paint)
+                bmp.recycle()
+                scaled.recycle()
+            }
+        }
+
+        // Optional: fill empty cells with placeholder color if needed
+        return merged
+    }
+
+    // Load bitmap from URI with sampling to fit within maxW x maxH
+    private fun loadBitmap(context: Context, uri: Uri, maxW: Int, maxH: Int): Bitmap? {
+        return try {
+            val opts = BitmapFactory.Options().apply { inJustDecodeBounds = true }
+            context.contentResolver.openInputStream(uri).use { ins ->
+                BitmapFactory.decodeStream(ins, null, opts)
+            }
+            val inSample = maxOf(1, max(opts.outWidth / maxW, opts.outHeight / maxH))
+            val opts2 = BitmapFactory.Options().apply { inSampleSize = inSample }
+            context.contentResolver.openInputStream(uri).use { ins ->
+                BitmapFactory.decodeStream(ins, null, opts2)
+            }
+        } catch (e: Exception) {
+            null
+        }
+    }
+}
diff --git a/test/airtest/test_puzzle_merge.py b/test/airtest/test_puzzle_merge.py
new file mode 100644
index 0000000..50cbc2d
--- /dev/null
+++ b/test/airtest/test_puzzle_merge.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+"""
+AirTest Script: Puzzle Merge - 2x2 large image composition
+"""
+
+from airtest.core.api import *
+auto_setup(__file__)
+
+def main():
+    start_app("com.inspection.camera")
+    sleep(2)
+    width, height = device().get_current_resolution()
+    # 进入拼图页入口（假设在屏幕右侧）
+    touch((width * 2 / 3, height - 150))
+    sleep(2)
+    snapshot("puzzle_merge_page.png")
+    print("Saved puzzle_merge_page.png")
+
+if __name__ == "__main__":
+    main()