refactor into modules

src/descriptors/mod.rs

@@ -0,0 +1,64 @@
+pub trait Descriptor {
+    fn info(&self) -> String {
+        "Descriptor".to_string()
+    }
+    fn resize(&self, img: image::DynamicImage) -> image::DynamicImage {
+        img.grayscale().thumbnail_exact(8, 8)
+    }
+    fn describe(&self, img: image::DynamicImage) -> u64;
+    fn distance(&self, a: u64, b: u64) -> u64 {
+        (a^b).count_ones().into()
+    }
+}
+
+/// Interprets a 64-element array as an 8x8 matrix
+/// returns a nicely printable string
+fn print_matrix<T: ToString>(array: [T; 64]) -> String {
+    let mut output = String::new();
+    for x in 0..8 {
+        for y in 0..8 {
+            output.push_str(&array[x*8+y].to_string());
+            output.push_str(",\t");
+        }
+        output.push('\n');
+    }
+    output
+}
+
+pub struct DCT {
+    quantization_matrix: [u8; 64],
+}
+
+pub mod dct;
+
+// fn median64<T: Ord + Copy>(values: &[T]) -> T {
+//     let mut sorted_values = values.to_vec();
+//     sorted_values.sort();
+//     let len = sorted_values.len();
+//     sorted_values[len/2]
+// }
+
+
+// pub struct Median;
+
+// impl Descriptor for Median {
+//     fn describe(&self, img: image::DynamicImage) -> u64 {
+//         let img = self.resize(img);
+//         let mut values: [u8; 64] = [0; 64];
+//         let mut i: usize = 0;
+//         for (_, _, pix) in img.pixels() {
+//             values[i] = pix[0];
+//             i = i+1;
+//         }
+//         let median = median64(&values);
+//         let mut mask: u64 = 0;
+//         img.save("debug.png").unwrap();
+//         for (_, _, pix) in img.pixels() {
+//             if pix[0] > median {
+//                 mask += 1;
+//             }
+//             mask = mask << 1;
+//         }
+//         mask
+//     }
+// }