feat(hash):基本完成图像感知散列功能。

src/hash/mod.rs

@@ -26,3 +26,24 @@ pub mod sha512 {
         crate::serialize::to_hex(result.as_slice())
     }
 }
+
+pub mod image_hash {
+    pub enum Precision {
+        Low = 2,
+        Medium = 8,
+        High = 18,
+        Detailed = 32,
+    }
+
+    pub fn hash_image<T: image::GenericImage<Pixel = image::Rgb<u8>>>(
+        input: &T,
+        precision: Precision,
+    ) -> String {
+        match precision {
+            Precision::Low => blockhash::blockhash16(input).to_string(),
+            Precision::Medium => blockhash::blockhash64(input).to_string(),
+            Precision::High => blockhash::blockhash144(input).to_string(),
+            Precision::Detailed => blockhash::blockhash256(input).to_string(),
+        }
+    }
+}

src/lib.rs

@@ -1,3 +1,5 @@
+pub extern crate image;
+
 pub mod encryption;
 pub mod hash;
 pub mod serial_code;