Serialization-Deserialization for DynamicImage using PNG and TIFF

CHANGES.md

@@ -6,6 +6,8 @@
 - The color space information of pixels is not clearly communicated.
 
 ## Changes
+- Added Float32 RGB and RGBA image encoding/decoding support for TIFF.
+- Implemented serialization/deserialization for DynamicImage using PNG for uint images, and TIFF for float32 images. The TIFF images are further compressed using Zlib::Deflate to reduce size. The PNG or TIFF-encoded images are stored internally as base64 encoded strings.
 
 ### Version 0.25.1
 

Cargo.toml

@@ -4,6 +4,7 @@ version = "0.25.1"
 edition = "2021"
 resolver = "2"
 
+
 # note: when changed, also update test runner in `.github/workflows/rust.yml`
 rust-version = "1.67.1"
 
@@ -55,13 +56,17 @@ rgb = { version = "0.8.25", optional = true }
 tiff = { version = "0.9.0", optional = true }
 zune-core = { version = "0.4.11", default-features = false, optional = true }
 zune-jpeg = { version = "0.4.11", optional = true }
+base64 = "0.22"
+serde = "1.0"
+flate2 = "1.0.30"
 
 [dev-dependencies]
 crc32fast = "1.2.0"
 num-complex = "0.4"
 glob = "0.3"
 quickcheck = "1"
 criterion = "0.5.0"
+serde_json = "1.0"
 
 [features]
 default = ["rayon", "default-formats"]

README.md

@@ -221,3 +221,20 @@ fn main() {
     image::save_buffer("image.png", buffer, 800, 600, image::ExtendedColorType::Rgb8).unwrap()
 }
 ```
+
+### Serialization and Deserialization
+A `DynamicImage` object can be serialized and deserialized:
+
+```rust,no_run
+fn main() {
+    use image::DynamicImage;
+    let path = "/path/to/image";
+    let img = image::open(&path).expect("Could not find image in path.");
+    let img_string = serde_json::to_string(&img).expect("Could not serialize.");
+    // Send the image
+
+    // Receive an image
+    let recv_json: String = todo!();
+    let recv_img = serde_json::from_str::<DynamicImage>(&recv_json).expect("Could not deserialize");
+}
+```