hashmap and serialization

not sure about the messagepack format, but its fine for now.

Cargo.lock

@@ -235,6 +235,8 @@ name = "image-similarity"
 version = "0.1.0"
 dependencies = [
  "image",
+ "rmp-serde",
+ "serde",
 ]
 
 [[package]]
@@ -368,6 +370,12 @@ version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "86f0b0d4bf799edbc74508c1e8bf170ff5f41238e5f8225603ca7caaae2b7860"
 
+[[package]]
+name = "paste"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1de2e551fb905ac83f73f7aedf2f0cb4a0da7e35efa24a202a936269f1f18e1"
+
 [[package]]
 name = "pin-project"
 version = "1.0.12"
@@ -442,6 +450,28 @@ dependencies = [
  "num_cpus",
 ]
 
+[[package]]
+name = "rmp"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44519172358fd6d58656c86ab8e7fbc9e1490c3e8f14d35ed78ca0dd07403c9f"
+dependencies = [
+ "byteorder",
+ "num-traits",
+ "paste",
+]
+
+[[package]]
+name = "rmp-serde"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c5b13be192e0220b8afb7222aa5813cb62cc269ebb5cac346ca6487681d2913e"
+dependencies = [
+ "byteorder",
+ "rmp",
+ "serde",
+]
+
 [[package]]
 name = "scoped_threadpool"
 version = "0.1.9"
@@ -454,6 +484,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
+[[package]]
+name = "serde"
+version = "1.0.147"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d193d69bae983fc11a79df82342761dfbf28a99fc8d203dca4c3c1b590948965"
+
 [[package]]
 name = "smallvec"
 version = "1.10.0"

Cargo.toml

@@ -7,3 +7,5 @@ edition = "2021"
 
 [dependencies]
 image = "0.24.4"
+serde = "1.0.147"
+rmp-serde = "1.1.1"

src/main.rs

@@ -1,17 +1,36 @@
 use descriptors::{Descriptor, Median};
+use std::collections::HashMap;
+use std::fs;
 
 pub mod descriptors;
 
 fn main() {
+    //Init all descriptors:
     let desc = Median;
-    let img0 = image::open("img/meowl.jpg").unwrap();
-    let img1 = image::open("img/nyameowl.jpg").unwrap();
-    let img2 = image::open("img/armmeowl.jpg").unwrap();
-    let img0_phash = desc.describe(img0);
-    let img1_phash = desc.describe(img1);
-    let img2_phash = desc.describe(img2);
-    println!("{:#x}", img0_phash);
-    println!("{:#x}", img1_phash);
-    println!("{:#x}", img2_phash);
-    println!("meowl and armmeowl are {} different", desc.distance(img0_phash, img2_phash));
+
+    //Pre-allocate hashmap to right size:
+    let count = fs::read_dir("img").unwrap().count();
+    let mut map: HashMap<String, u64> = HashMap::with_capacity(count);
+
+    //Calculate phashes for all images
+    for node in fs::read_dir("img").unwrap() {
+        let file = node.expect("Error walking directory");
+        let img = image::open(file.path()).expect("Unable to open file");
+        let phash = desc.describe(img);
+        let name = file.file_name().into_string().expect("Issue with filename");
+        map.insert(name, phash);
+    }
+
+    for (key, val) in map.iter() {
+        println!("{key}: {val}");
+    }
+
+    //Test (de)serialize to vector with MessagePack:
+    let serialized: Vec<u8> = rmp_serde::to_vec(&map).unwrap();
+
+    let x: HashMap<String, u64> = rmp_serde::from_slice(&serialized).unwrap();
+
+    for (key, val) in x.iter() {
+        println!("{key}: {val}");
+    }
 }