Increase sensor sample size to 10%

Author: tstromberg

README.md

@@ -71,7 +71,7 @@ The Observer Effect is optimized to run on a wide range of devices, from high-en
 - Camera frames throttled to ~5 FPS to reduce CPU usage by 80%
 - Automatic memory management - pauses detection during low memory conditions
 - Low resolution processing (320×240) for minimal resource usage
-- Efficient pixel sampling (~1000 pixels per frame)
+- Efficient pixel sampling (10% of pixels, ~7,680 samples per frame)
 
 **High-end device features:**
 - Optional app preload for instant appearance (100-300ms vs 2-5 seconds)

app/src/main/kotlin/com/observer/effect/MotionDetector.kt

@@ -227,9 +227,9 @@ class MotionDetector(
 
             previousFrame?.let { prevFrame ->
                 if (data.size == prevFrame.size) {
-                    // Calculate frame difference by sampling ~1000 pixels
+                    // Calculate frame difference by sampling 10% of pixels (~7680 pixels at 320x240)
                     var diff = 0L
-                    val step = maxOf(1, data.size / 1000)
+                    val step = 10
                     for (i in data.indices step step) {
                         diff += abs(data[i].toInt() - prevFrame[i].toInt())
                     }