diff --git a/CHANGELOG.md b/CHANGELOG.md
index e646298..14740e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 0.12.0 (2026-07-31)
+
+### 新增
+- 双三次缩放：`resize_bicubic(w, h)`，Catmull-Rom 4×4 核、中心对齐采样，同尺寸缩放为恒等
+- 感知哈希：`average_hash()` / `difference_hash()` 返回 64 位指纹，`hamming_distance(a, b)` 度量相似度；区域均值缩略图保证跨后端确定性
+- 确定性噪声：`add_gaussian_noise(seed, sigma)`（CLT 12 均匀和）与 `add_salt_pepper(seed, density)`，64 位 LCG 驱动，同 seed 逐字节可重现
+
+### 变更
+- 单元测试从 147 个增加到 163 个（含反相恰好翻转全部 64 位、中值滤波清除 ≥75% 椒盐噪声等强断言）
+
 ## 0.11.0 (2026-07-30)
 
 代码审查驱动的加固（三视角审查后全量修复）：
diff --git a/README.en.md b/README.en.md
index b3eea5a..00ec0a9 100644
--- a/README.en.md
+++ b/README.en.md
@@ -19,7 +19,7 @@ English | [简体中文](README.md)
 
 ## ✨ Features
 
-- **26 filters & geometric transforms**: grayscale, invert, brightness, contrast, gaussian/box blur, sharpen, emboss, Laplacian/Sobel/Scharr/Canny edges, sepia, threshold, pixelate, median denoise, histogram equalization, posterize, gamma, vignette, saturate, hue rotate, horizontal/vertical flips — plus 90° rotation and nearest/bilinear resize.
+- **26 filters & geometric transforms**: grayscale, invert, brightness, contrast, gaussian/box blur, sharpen, emboss, Laplacian/Sobel/Scharr/Canny edges, sepia, threshold, pixelate, median denoise, histogram equalization, posterize, gamma, vignette, saturate, hue rotate, horizontal/vertical flips — plus 90° rotation and nearest/bilinear/bicubic (Catmull-Rom) resize.
 - **Morphology**: 3×3 erode / dilate / open / close.
 - **Image codecs**: PNG (self-implemented full DEFLATE inflate with CRC-32/Adler-32 verification), GIF decoding (variable-width LZW, interlacing, transparency), QOI (complete spec, lossless round trip) and BMP (uncompressed 24/32-bit) — all in pure MoonBit.
 - **Affine transforms**: an `Affine` matrix type (rotate/translate/scale/shear + composition + inversion) rendered by inverse mapping with bilinear sampling; arbitrary-angle `rotate(degrees)`.
@@ -28,7 +28,7 @@ English | [简体中文](README.md)
 - **Unsharp mask**: `unsharp_mask(radius, amount)` reuses the Gaussian to extract and re-add high-frequency detail, sharpening edges.
 - **Crop & pad**: `crop(x, y, w, h)` (clamped to bounds) and `pad(l, t, r, b, color)` (colored borders); `crop∘pad` round-trips losslessly.
 - **Bilateral filter**: `bilateral(radius, σs, σr)` edge-preserving smoothing — denoises flat regions while keeping strong edges sharp.
-- **Image analysis**: Otsu automatic thresholding (between-class variance), Floyd–Steinberg error-diffusion dithering, 4-connected component labeling and counting, chamfer (3,4) distance transform.
+- **Image analysis**: Otsu automatic thresholding (between-class variance), Floyd–Steinberg error-diffusion dithering, 4-connected component labeling and counting, chamfer (3,4) distance transform, perceptual hashes (aHash/dHash + Hamming distance).
 - **Integral image & O(1) box blur**: `integral_image()` builds a summed-area table (Int64, overflow-safe) that drives `box_blur(radius)` at O(1) per pixel for any radius.
 - **Flood fill**: `flood_fill(x, y, color, tolerance)` 4-connected seed fill with per-channel tolerance.
 - **Layer compositing**: `composite(top, mode)` — Porter-Duff source-over with 8 blend modes (multiply, screen, overlay, darken, lighten, difference, add), in rounded integer math.
@@ -36,7 +36,8 @@ English | [简体中文](README.md)
 - **Color spaces**: exact round-trip RGB ↔ HSV and RGB ↔ YCbCr (BT.601) conversions.
 - **Generic convolution engine**: `Kernel` + `Image::convolve` for custom odd-sized kernels.
 - **Image statistics & tone**: `stats()` per-channel min/max/mean (Int64 accumulation), `auto_contrast()` automatic contrast stretch, `levels(black, white, gamma)` tonal remap.
-- **Integer-first, deterministic**: filter math sticks to integers where possible (e.g. luma weights ×1000); results are reproducible and **all 147 unit tests are hand-verified** (including canonical CRC-32/Adler-32 check vectors and a hand-assembled DEFLATE bitstream).
+- **Deterministic noise**: `add_gaussian_noise(seed, σ)` / `add_salt_pepper(seed, density)` driven by a 64-bit LCG — the same seed is byte-identical on every backend.
+- **Integer-first, deterministic**: filter math sticks to integers where possible (e.g. luma weights ×1000); results are reproducible and **all 163 unit tests are hand-verified** (including canonical CRC-32/Adler-32 check vectors and a hand-assembled DEFLATE bitstream).
 - **Zero dependencies**: only `moonbitlang/core`, no third-party libraries.
 - **Multi-backend, zero-copy interop**: on the js backend a `FixedArray[Byte]` *is* a `Uint8Array`, so canvas `Uint8ClampedArray` buffers cross over without copies; the linear-memory wasm backend exports `memory` for bulk pixel access.
 - **Browser Playground**: drag & drop / paste / upload images, stackable filter pipeline, JS/WASM engine switch with benchmarks, an optional **Web Worker background thread** for large images, and PNG downloads produced by the library's **own `png_encode`**.
@@ -62,6 +63,9 @@ pixelforge/
 ├── floodfill.mbt          # flood fill (4-connected seed fill)
 ├── distance.mbt           # chamfer (3,4) distance transform
 ├── stats.mbt              # statistics / auto-contrast / levels
+├── bicubic.mbt            # bicubic resize (Catmull-Rom)
+├── phash.mbt              # perceptual hashes (aHash/dHash + Hamming)
+├── noise.mbt              # deterministic noise (gaussian / salt-pepper)
 ├── bilateral.mbt          # bilateral filter (edge-preserving)
 ├── otsu.mbt               # Otsu automatic threshold
 ├── dither.mbt             # Floyd–Steinberg error diffusion
@@ -75,7 +79,7 @@ pixelforge/
 ├── transform.mbt          # flips, 90° rotation
 ├── resize.mbt             # nearest/bilinear resize
 ├── dispatch.mbt           # Image::apply_filter_id shared dispatch table
-├── *_test.mbt             # 147 deterministic tests (blackbox + whitebox)
+├── *_test.mbt             # 163 deterministic tests (blackbox + whitebox)
 ├── cmd/main/              # native CLI example (moon run cmd/main)
 ├── cmd/ppm/               # PPM output example (moon run cmd/ppm > edges.ppm)
 ├── cmd/showcase/          # capstone demo (drawing+text+filter+PNG round trip)
@@ -94,7 +98,7 @@ pixelforge/
 Install the [MoonBit toolchain](https://www.moonbitlang.com/download/) first.
 
 ```bash
-moon test              # run the 147 unit tests
+moon test              # run the 163 unit tests
 moon run cmd/main      # native example (builds an image, runs filters, prints checksums)
 moon run cmd/ppm > edges.ppm   # emit a Sobel edge-detected PPM image
 ```
@@ -164,7 +168,7 @@ let png_bytes = @pixelforge.png_encode(framed)
 | 21 | Otsu auto threshold | `otsu()` | — |
 | 22 | Floyd–Steinberg dither (mono) | `dither_mono()` | — |
 
-> Size-changing transforms are library APIs rather than dispatch ids: `rotate90()`, `resize_nearest(w, h)`, `resize_bilinear(w, h)`. Likewise for multi-parameter APIs: `box_blur(radius)`, `flood_fill(x, y, color, tol)`, `distance_transform(t)`, `gaussian(radius)`, `unsharp_mask(radius, amount)`, `crop(x, y, w, h)`, `pad(l, t, r, b, color)`, `bilateral(radius, σs, σr)`, `dither_grayscale(levels)`/`dither_mono()`, `otsu_threshold()`, `label_components(t)`/`count_components(t)`, `composite(top, mode)`, `draw_text(...)`, `rotate(deg)`, `translate(dx, dy)`, `affine(t)`, the drawing primitives, `saturate(factor)`, `hue_rotate(deg)`, the morphology operators, `png_encode`/`png_decode`, `gif_decode`, `qoi_encode`/`qoi_decode`, `bmp_encode`/`bmp_decode` and the color-space functions.
+> Size-changing transforms are library APIs rather than dispatch ids: `rotate90()`, `resize_nearest(w, h)`, `resize_bilinear(w, h)`, `resize_bicubic(w, h)`. Likewise for multi-parameter APIs: `average_hash()`/`difference_hash()`/`hamming_distance`, `add_gaussian_noise`/`add_salt_pepper`, `box_blur(radius)`, `flood_fill(x, y, color, tol)`, `distance_transform(t)`, `gaussian(radius)`, `unsharp_mask(radius, amount)`, `crop(x, y, w, h)`, `pad(l, t, r, b, color)`, `bilateral(radius, σs, σr)`, `dither_grayscale(levels)`/`dither_mono()`, `otsu_threshold()`, `label_components(t)`/`count_components(t)`, `composite(top, mode)`, `draw_text(...)`, `rotate(deg)`, `translate(dx, dy)`, `affine(t)`, the drawing primitives, `saturate(factor)`, `hue_rotate(deg)`, the morphology operators, `png_encode`/`png_decode`, `gif_decode`, `qoi_encode`/`qoi_decode`, `bmp_encode`/`bmp_decode` and the color-space functions.
 
 ## 🏗️ Architecture & backends
 
@@ -182,7 +186,7 @@ moon test                 # default backend (wasm-gc)
 moon test --target js     # js backend
 ```
 
-147 tests cover every filter, transform, drawing primitive, blend mode, the font, the analysis algorithms and all four codecs. Every expected value is derived by hand — impulse responses, flat-field invariance, known edges, histogram remapping, exact encoded byte lengths, lossless round trips, canonical CRC-32/Adler-32 check vectors and hand-assembled DEFLATE and GIF LZW bitstreams — and passes on both the wasm-gc and js backends, with GitHub Actions CI.
+163 tests cover every filter, transform, drawing primitive, blend mode, the font, the analysis algorithms and all four codecs. Every expected value is derived by hand — impulse responses, flat-field invariance, known edges, histogram remapping, exact encoded byte lengths, lossless round trips, canonical CRC-32/Adler-32 check vectors and hand-assembled DEFLATE and GIF LZW bitstreams — and passes on both the wasm-gc and js backends, with GitHub Actions CI.
 
 ## 📮 Published on mooncakes.io
 
diff --git a/README.md b/README.md
index af0f891..046b297 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@
 
 ## ✨ 特性
 
-- **26 种滤镜与几何变换**：灰度、反色、亮度、对比度、高斯/盒式模糊、锐化、浮雕、拉普拉斯/Sobel/Scharr/Canny 边缘、棕褐色、二值化、像素化、中值降噪、直方图均衡、色调分离、伽马校正、暗角、饱和度、色相旋转、水平/垂直翻转；另有 90° 旋转与最近邻/双线性缩放。
+- **26 种滤镜与几何变换**：灰度、反色、亮度、对比度、高斯/盒式模糊、锐化、浮雕、拉普拉斯/Sobel/Scharr/Canny 边缘、棕褐色、二值化、像素化、中值降噪、直方图均衡、色调分离、伽马校正、暗角、饱和度、色相旋转、水平/垂直翻转；另有 90° 旋转与最近邻/双线性/双三次 (Catmull-Rom) 缩放。
 - **形态学运算**：3×3 腐蚀 / 膨胀 / 开运算 / 闭运算。
 - **图像编解码**：PNG（自实现完整 DEFLATE inflate + CRC-32/Adler-32 校验）、GIF 解码（变长 LZW、交错、透明索引）、QOI（完整规范，无损往返）与 BMP（无压缩 24/32 位）纯 MoonBit 实现。
 - **仿射变换**：`Affine` 矩阵（旋转/平移/缩放/错切 + 复合 + 求逆），逆映射双线性采样；任意角度 `rotate(degrees)`。
@@ -28,7 +28,7 @@
 - **锐化蒙版**：`unsharp_mask(radius, amount)` 复用高斯模糊提取高频细节并回叠，锐化边缘。
 - **裁剪与填充**：`crop(x, y, w, h)`（自动限幅）与 `pad(l, t, r, b, color)`（颜色边框），`crop∘pad` 可无损往返。
 - **双边滤波**：`bilateral(radius, σs, σr)` 保边平滑——平坦区域降噪，强边缘保持锐利。
-- **图像分析**：Otsu 自动阈值（类间方差最大化）、Floyd–Steinberg 误差扩散抖动、四连通连通域标记与计数、chamfer (3,4) 距离变换。
+- **图像分析**：Otsu 自动阈值（类间方差最大化）、Floyd–Steinberg 误差扩散抖动、四连通连通域标记与计数、chamfer (3,4) 距离变换、感知哈希（aHash/dHash + 汉明距离）。
 - **积分图与 O(1) 盒式模糊**：`integral_image()` 求和面积表（Int64 防溢出）驱动 `box_blur(radius)`，任意半径每像素 O(1)。
 - **泛洪填充**：`flood_fill(x, y, color, tolerance)` 四连通种子填充，逐通道容差。
 - **图层合成**：`composite(top, mode)` Porter-Duff source-over + 8 种混合模式（正片叠底/滤色/叠加/变暗/变亮/差值/线性减淡等），纯整数舍入运算。
@@ -36,7 +36,8 @@
 - **色彩空间**：RGB ↔ HSV、RGB ↔ YCbCr (BT.601) 精确往返转换。
 - **通用卷积引擎**：`Kernel` + `Image::convolve`，可自定义任意奇数尺寸卷积核。
 - **图像统计与色调**：`stats()` 逐通道 min/max/mean（Int64 累加）、`auto_contrast()` 自动对比度拉伸、`levels(black, white, gamma)` 色阶重映射。
-- **纯整数、确定性**：滤镜数学尽量用整数（如亮度权重 ×1000），结果可复现、**147 个单元测试全部手算验证**（含 CRC-32/Adler-32 公开参考向量与手工汇编的 DEFLATE 位流）。
+- **确定性噪声**：`add_gaussian_noise(seed, σ)` / `add_salt_pepper(seed, density)`，64 位 LCG 驱动，同 seed 跨后端逐字节一致。
+- **纯整数、确定性**：滤镜数学尽量用整数（如亮度权重 ×1000），结果可复现、**163 个单元测试全部手算验证**（含 CRC-32/Adler-32 公开参考向量与手工汇编的 DEFLATE 位流）。
 - **零依赖**：只用 `moonbitlang/core`，不引入任何第三方库。
 - **多后端 + 零拷贝互操作**：js 后端下 `FixedArray[Byte]` 就是 `Uint8Array`，与 canvas 的 `Uint8ClampedArray` 零拷贝互通；线性内存 wasm 后端导出 `memory`，宿主直接批量读写像素。
 - **浏览器 Playground**：拖拽 / 粘贴 / 上传图片，滤镜可叠加成管线，JS/WASM 引擎切换与性能对比，可切换到 **Web Worker 后台线程**处理大图不卡 UI，处理结果用**自家 `png_encode`** 一键下载 PNG。
@@ -62,6 +63,9 @@ pixelforge/
 ├── floodfill.mbt          # 泛洪填充（四连通种子填充）
 ├── distance.mbt           # chamfer (3,4) 距离变换
 ├── stats.mbt              # 图像统计 / 自动对比度 / 色阶
+├── bicubic.mbt            # 双三次缩放（Catmull-Rom）
+├── phash.mbt              # 感知哈希（aHash/dHash + 汉明距离）
+├── noise.mbt              # 确定性噪声（高斯 / 椒盐，LCG）
 ├── bilateral.mbt          # 双边滤波（保边平滑）
 ├── otsu.mbt               # Otsu 自动阈值（类间方差最大化）
 ├── dither.mbt             # Floyd–Steinberg 误差扩散抖动
@@ -75,7 +79,7 @@ pixelforge/
 ├── transform.mbt          # 水平/垂直翻转、90° 旋转
 ├── resize.mbt             # 最近邻/双线性缩放
 ├── dispatch.mbt           # Image::apply_filter_id 统一派发（各绑定共用）
-├── *_test.mbt             # 147 个确定性测试（黑盒 + 白盒）
+├── *_test.mbt             # 163 个确定性测试（黑盒 + 白盒）
 ├── cmd/main/              # 原生 CLI 示例（moon run cmd/main）
 ├── cmd/ppm/               # PPM 图像输出示例（moon run cmd/ppm > edges.ppm）
 ├── cmd/showcase/          # 综合展示（绘图+文字+滤镜+PNG 往返自检）
@@ -93,7 +97,7 @@ pixelforge/
 先安装 [MoonBit 工具链](https://www.moonbitlang.cn/download/)。
 
 ```bash
-moon test              # 运行 147 个单元测试
+moon test              # 运行 163 个单元测试
 moon run cmd/main      # 运行原生示例（生成图像并跑滤镜，打印校验和）
 moon run cmd/showcase > showcase.ppm   # 综合展示：绘图+文字+滤镜+PNG 往返自检
 moon run cmd/ppm > edges.ppm   # 生成一张 Sobel 边缘检测的 PPM 图片
@@ -162,7 +166,7 @@ let bytes = out.data // FixedArray[Byte]，长度 = width*height*4
 | 21 | Otsu 自动阈值 | `otsu()` | — |
 | 22 | Floyd–Steinberg 抖动（二值） | `dither_mono()` | — |
 
-> 会改变尺寸的变换不走 id 派发，直接调用库 API：`rotate90()`、`resize_nearest(w, h)`、`resize_bilinear(w, h)`。多参数 / 非图像→图像的 API 同理：`box_blur(radius)`、`flood_fill(x, y, color, tol)`、`distance_transform(t)`、`gaussian(radius)`、`unsharp_mask(radius, amount)`、`crop(x, y, w, h)`、`pad(l, t, r, b, color)`、`bilateral(radius, σs, σr)`、`dither_grayscale(levels)`/`dither_mono()`、`otsu_threshold()`、`label_components(t)`/`count_components(t)`、`composite(top, mode)`、`draw_text(...)`、`rotate(deg)`、`translate(dx, dy)`、`affine(t)`、`draw_line`/`draw_rect`/`draw_circle` 等绘图原语、`saturate(factor)`、`hue_rotate(deg)`、`erode()`/`dilate()`/`morph_open()`/`morph_close()`、`png_encode`/`png_decode`、`gif_decode`、`qoi_encode`/`qoi_decode`、`bmp_encode`/`bmp_decode`、`rgb_to_hsv` 等色彩空间函数。
+> 会改变尺寸的变换不走 id 派发，直接调用库 API：`rotate90()`、`resize_nearest(w, h)`、`resize_bilinear(w, h)`、`resize_bicubic(w, h)`。多参数 / 非图像→图像的 API 同理：`average_hash()`/`difference_hash()`/`hamming_distance`、`add_gaussian_noise`/`add_salt_pepper`、`box_blur(radius)`、`flood_fill(x, y, color, tol)`、`distance_transform(t)`、`gaussian(radius)`、`unsharp_mask(radius, amount)`、`crop(x, y, w, h)`、`pad(l, t, r, b, color)`、`bilateral(radius, σs, σr)`、`dither_grayscale(levels)`/`dither_mono()`、`otsu_threshold()`、`label_components(t)`/`count_components(t)`、`composite(top, mode)`、`draw_text(...)`、`rotate(deg)`、`translate(dx, dy)`、`affine(t)`、`draw_line`/`draw_rect`/`draw_circle` 等绘图原语、`saturate(factor)`、`hue_rotate(deg)`、`erode()`/`dilate()`/`morph_open()`/`morph_close()`、`png_encode`/`png_decode`、`gif_decode`、`qoi_encode`/`qoi_decode`、`bmp_encode`/`bmp_decode`、`rgb_to_hsv` 等色彩空间函数。
 
 ## 🏗️ 架构与多后端
 
@@ -180,7 +184,7 @@ moon test                 # 默认后端（wasm-gc）
 moon test --target js     # js 后端
 ```
 
-147 个测试覆盖每个滤镜、变换、绘图原语、合成模式、字体、分析算法与编解码器，期望值均为手工推导（脉冲响应、平场不变性、已知边缘、直方图重映射、编码字节精确长度、无损往返、CRC-32/Adler-32 公开参考向量、手工汇编的 DEFLATE 与 GIF LZW 位流等），在 wasm-gc 与 js 后端下均通过；GitHub Actions 持续集成。
+163 个测试覆盖每个滤镜、变换、绘图原语、合成模式、字体、分析算法与编解码器，期望值均为手工推导（脉冲响应、平场不变性、已知边缘、直方图重映射、编码字节精确长度、无损往返、CRC-32/Adler-32 公开参考向量、手工汇编的 DEFLATE 与 GIF LZW 位流等），在 wasm-gc 与 js 后端下均通过；GitHub Actions 持续集成。
 
 ## 📮 发布到 mooncakes.io
 
diff --git a/moon.mod b/moon.mod
index 37ab930..246e6a3 100644
--- a/moon.mod
+++ b/moon.mod
@@ -1,6 +1,6 @@
 name = "0717lee/pixelforge"
 
-version = "0.11.0"
+version = "0.12.0"
 
 readme = "README.md"