[course] 日常

未定概率的算术编码
YDX-2147483647 · Jun 19, 2023 · c0f4116 · c0f4116
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diff --git a/docs/course/digital-image-processing.md b/docs/course/digital-image-processing.md
@@ -225,6 +225,8 @@ The multidimensional DFT expresses the input as a superposition of plane waves,
 
   将累积联合概率表示为二进制小数。
 
+  若无确定概率模型，也可依序列中频率动态估计。
+
 - **变换**
 
   变换集中信号，像素解相关，适应心理视觉。编码步骤为分块、正变换、量化、熵编码，解码反之。