[0.5.1] Added: Pixel3DArrayToRGBChannelArray

InBinaryWorld · Oct 29, 2021 · 054dbb4 · 054dbb4
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diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
@@ -7,18 +7,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
+## [[0.5.1]] - 2021-10-29 _(MJ)_
+
+###### _([diff: 0.5.0-0.5.1])_
+
+Added:
+
+- `pixel3DArrayToChannelArray()` implementation in [`histogram-shifting.js`](../src/algorithms/histogram-shifting.js)
+
 ## [[0.5.0]] - 2021-10-26 _(JW)_
 
 ###### _([diff: 0.4.1-0.5.0])_
 
 Added:
 
- - [_Reversible Data Hiding_](./docs/papers/Reversible_data_hiding.pdf) - a paper on histogram shifting
- - Directory `/src/algorithms/` with three javascript files containg basic structure of three chosen encryption methods
+- [_Reversible Data Hiding_](./docs/papers/Reversible_data_hiding.pdf) - a paper on histogram shifting
+- Directory `/src/algorithms/` with three javascript files containg basic structure of three chosen encryption methods
 
- Changed:
+Changed:
 
- - `main.js` now invokes the (not yet finished) encryption methods of the `/src/algorithms/` directory instead of the sample methods from `/src/algorithms.js` (which was removed)
+- `main.js` now invokes the (not yet finished) encryption methods of the `/src/algorithms/` directory instead of the sample methods from `/src/algorithms.js` (which was removed)
 
 ## [[0.4.1]] - 2021-10-26 _(MJ)_
 
@@ -147,6 +155,7 @@ Added:
 - Created [**`CHANGELOG.md`**](../docs/CHANGELOG.md) for the project that contains the history of changes for this project.
 - Created [**`README.md`**](../README.md) for the project that contains various useful information, requirements and instructions in order ot run the program.
 
+[diff: 0.5.0-0.5.1]: https://github.com/Luzkan/CryptoImage/compare/0.5.0...0.5.1
 [diff: 0.4.1-0.5.0]: https://github.com/Luzkan/CryptoImage/compare/0.4.1...0.5.0
 [diff: 0.4.0-0.4.1]: https://github.com/Luzkan/CryptoImage/compare/0.4.0...0.4.1
 [diff: 0.3.0-0.4.0]: https://github.com/Luzkan/CryptoImage/compare/0.3.0...0.4.0
@@ -155,6 +164,7 @@ Added:
 [diff: 0.1.0-0.1.1]: https://github.com/Luzkan/CryptoImage/compare/0.1.0...0.1.1
 [diff: 0.0.1-0.1.0]: https://github.com/Luzkan/CryptoImage/compare/0.0.1...0.1.0
 [diff: 0.0.0-0.0.1]: https://github.com/Luzkan/CryptoImage/compare/0.0.0...0.0.1
+[0.5.0]: https://github.com/Luzkan/CryptoImage/releases/tag/0.5.1
 [0.5.0]: https://github.com/Luzkan/CryptoImage/releases/tag/0.5.0
 [0.4.1]: https://github.com/Luzkan/CryptoImage/releases/tag/0.4.1
 [0.4.0]: https://github.com/Luzkan/CryptoImage/releases/tag/0.4.0

diff --git a/src/algorithms/histogram-shifting.js b/src/algorithms/histogram-shifting.js
@@ -7,14 +7,39 @@ function histogramShiftingEncrypt(pixel3DArray) {
 
     channelArray.forEach(encryptInChannel)
 
-    return channelArrayToPixel3DArray(channelArray)
+    return channelArrayToPixel3DArray(pixel3DArray)
+    // return channelArrayToPixel3DArray(channelArray)
 }
 
-function pixel3DArrayToChannelArray(pixel3DArray) {
 
-    // convert pixel 3D array to three arrays representing R, G and B pixel values
+class RGB {
+    constructor(idx, red, green, blue, transparency) {
+        this.idx = idx;
+        this.red = red;
+        this.green = green;
+        this.blue = blue;
+        this.transparency = transparency;
+    }
+}
+
+function pixel3DArrayToChannelArray(pixel3DArray) {
+    let RGBChannelArray = [];
+    let pixelIterator = 0;
+
+    for (let channel in pixel3DArray) {
+        for (let pixel in pixel3DArray[channel]) {
+            RGBChannelArray.push(new RGB(
+                pixelIterator,
+                pixel3DArray[channel][pixel][0],
+                pixel3DArray[channel][pixel][1],
+                pixel3DArray[channel][pixel][2],
+                pixel3DArray[channel][pixel][3]
+            ));
+            pixelIterator += 1;
+        }
+    }
 
-    return [[], [], []];
+    return RGBChannelArray;
 }
 
 function encryptInChannel(channel) {
@@ -60,6 +85,6 @@ function channelArrayToPixel3DArray(channelArray) {
 
     // convert three channel arrays to a pixel 3D array
 
-    const temporaryUpsideDownImage = pixel3DArray.reverse();
+    const temporaryUpsideDownImage = channelArray.reverse();
     return encodeBMPFrom3dData(temporaryUpsideDownImage);
 }