diff --git a/lib/JpegToBmpConverter/JpegToBmpConverter.cpp b/lib/JpegToBmpConverter/JpegToBmpConverter.cpp
index 1be189e1..9613767c 100644
--- a/lib/JpegToBmpConverter/JpegToBmpConverter.cpp
+++ b/lib/JpegToBmpConverter/JpegToBmpConverter.cpp
@@ -8,6 +8,7 @@
 #include <cstring>
 
 #include "Bitmap.h"
+#include "Dithering.h"
 
 // Context structure for picojpeg callback
 struct JpegReadContext {
@@ -31,191 +32,6 @@ constexpr int TARGET_MAX_WIDTH = 480;   // Max width for cover images (portrait
 constexpr int TARGET_MAX_HEIGHT = 800;  // Max height for cover images (portrait display height)
 // ============================================================================
 
-// Atkinson dithering - distributes only 6/8 (75%) of error for cleaner results
-// Error distribution pattern:
-//     X  1/8 1/8
-// 1/8 1/8 1/8
-//     1/8
-// Less error buildup = fewer artifacts than Floyd-Steinberg
-class AtkinsonDitherer {
- public:
-  AtkinsonDitherer(int width) : width(width) {
-    errorRow0 = new int16_t[width + 4]();  // Current row
-    errorRow1 = new int16_t[width + 4]();  // Next row
-    errorRow2 = new int16_t[width + 4]();  // Row after next
-  }
-
-  ~AtkinsonDitherer() {
-    delete[] errorRow0;
-    delete[] errorRow1;
-    delete[] errorRow2;
-  }
-
-  uint8_t processPixel(int gray, int x) {
-    // Apply brightness/contrast/gamma adjustments
-    gray = adjustPixel(gray);
-
-    // Add accumulated error
-    int adjusted = gray + errorRow0[x + 2];
-    if (adjusted < 0) adjusted = 0;
-    if (adjusted > 255) adjusted = 255;
-
-    // Quantize to 4 levels
-    uint8_t quantized;
-    int quantizedValue;
-    if (adjusted < 43) {
-      quantized = 0;
-      quantizedValue = 0;
-    } else if (adjusted < 128) {
-      quantized = 1;
-      quantizedValue = 85;
-    } else if (adjusted < 213) {
-      quantized = 2;
-      quantizedValue = 170;
-    } else {
-      quantized = 3;
-      quantizedValue = 255;
-    }
-
-    // Calculate error (only distribute 6/8 = 75%)
-    int error = (adjusted - quantizedValue) >> 3;  // error/8
-
-    // Distribute 1/8 to each of 6 neighbors
-    errorRow0[x + 3] += error;  // Right
-    errorRow0[x + 4] += error;  // Right+1
-    errorRow1[x + 1] += error;  // Bottom-left
-    errorRow1[x + 2] += error;  // Bottom
-    errorRow1[x + 3] += error;  // Bottom-right
-    errorRow2[x + 2] += error;  // Two rows down
-
-    return quantized;
-  }
-
-  void nextRow() {
-    int16_t* temp = errorRow0;
-    errorRow0 = errorRow1;
-    errorRow1 = errorRow2;
-    errorRow2 = temp;
-    memset(errorRow2, 0, (width + 4) * sizeof(int16_t));
-  }
-
-  void reset() {
-    memset(errorRow0, 0, (width + 4) * sizeof(int16_t));
-    memset(errorRow1, 0, (width + 4) * sizeof(int16_t));
-    memset(errorRow2, 0, (width + 4) * sizeof(int16_t));
-  }
-
- private:
-  int width;
-  int16_t* errorRow0;
-  int16_t* errorRow1;
-  int16_t* errorRow2;
-};
-
-// Floyd-Steinberg error diffusion dithering with serpentine scanning
-// Serpentine scanning alternates direction each row to reduce "worm" artifacts
-// Error distribution pattern (left-to-right):
-//       X   7/16
-// 3/16 5/16 1/16
-// Error distribution pattern (right-to-left, mirrored):
-// 1/16 5/16 3/16
-//      7/16  X
-class FloydSteinbergDitherer {
- public:
-  FloydSteinbergDitherer(int width) : width(width), rowCount(0) {
-    errorCurRow = new int16_t[width + 2]();  // +2 for boundary handling
-    errorNextRow = new int16_t[width + 2]();
-  }
-
-  ~FloydSteinbergDitherer() {
-    delete[] errorCurRow;
-    delete[] errorNextRow;
-  }
-
-  // Process a single pixel and return quantized 2-bit value
-  // x is the logical x position (0 to width-1), direction handled internally
-  uint8_t processPixel(int gray, int x, bool reverseDirection) {
-    // Add accumulated error to this pixel
-    int adjusted = gray + errorCurRow[x + 1];
-
-    // Clamp to valid range
-    if (adjusted < 0) adjusted = 0;
-    if (adjusted > 255) adjusted = 255;
-
-    // Quantize to 4 levels (0, 85, 170, 255)
-    uint8_t quantized;
-    int quantizedValue;
-    if (adjusted < 43) {
-      quantized = 0;
-      quantizedValue = 0;
-    } else if (adjusted < 128) {
-      quantized = 1;
-      quantizedValue = 85;
-    } else if (adjusted < 213) {
-      quantized = 2;
-      quantizedValue = 170;
-    } else {
-      quantized = 3;
-      quantizedValue = 255;
-    }
-
-    // Calculate error
-    int error = adjusted - quantizedValue;
-
-    // Distribute error to neighbors (serpentine: direction-aware)
-    if (!reverseDirection) {
-      // Left to right: standard distribution
-      // Right: 7/16
-      errorCurRow[x + 2] += (error * 7) >> 4;
-      // Bottom-left: 3/16
-      errorNextRow[x] += (error * 3) >> 4;
-      // Bottom: 5/16
-      errorNextRow[x + 1] += (error * 5) >> 4;
-      // Bottom-right: 1/16
-      errorNextRow[x + 2] += (error) >> 4;
-    } else {
-      // Right to left: mirrored distribution
-      // Left: 7/16
-      errorCurRow[x] += (error * 7) >> 4;
-      // Bottom-right: 3/16
-      errorNextRow[x + 2] += (error * 3) >> 4;
-      // Bottom: 5/16
-      errorNextRow[x + 1] += (error * 5) >> 4;
-      // Bottom-left: 1/16
-      errorNextRow[x] += (error) >> 4;
-    }
-
-    return quantized;
-  }
-
-  // Call at the end of each row to swap buffers
-  void nextRow() {
-    // Swap buffers
-    int16_t* temp = errorCurRow;
-    errorCurRow = errorNextRow;
-    errorNextRow = temp;
-    // Clear the next row buffer
-    memset(errorNextRow, 0, (width + 2) * sizeof(int16_t));
-    rowCount++;
-  }
-
-  // Check if current row should be processed in reverse
-  bool isReverseRow() const { return (rowCount & 1) != 0; }
-
-  // Reset for a new image or MCU block
-  void reset() {
-    memset(errorCurRow, 0, (width + 2) * sizeof(int16_t));
-    memset(errorNextRow, 0, (width + 2) * sizeof(int16_t));
-    rowCount = 0;
-  }
-
- private:
-  int width;
-  int rowCount;
-  int16_t* errorCurRow;
-  int16_t* errorNextRow;
-};
-
 inline void write16(Print& out, const uint16_t value) {
   out.write(value & 0xFF);
   out.write((value >> 8) & 0xFF);