Create README.md

README.md

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+## ImageHandler
+### 初始化 - new ImageHandler("影像路徑")
+````java
+ImageHandler image_handler = new ImageHandler("影像路徑");
+````
+### 讀取影像 - loadImage()
+````java
+BufferedImage origin_image = image_handler.loadImage();
+````
+### 儲存影像 - outputImage(影像檔, 影像名稱)
+````java
+String image_path = "影像路徑";
+ImageHandler image_handler = new ImageHandler(image_path);
+image_handler.outputImage(影像檔, "測試輸出");
+
+````
+## Filter
+### Gray : 灰階化
+````java
+Filter.toGray(影像檔);
+````
+### toNegative : 負片效果
+````java
+Filter.toNegative(影像檔);
+````
+
+### setGamma : 設定 gamma
+````java
+Filter.setGamma(影像檔, gamma 值);
+````
+
+### saltpepper : 胡椒鹽雜訊
+````java
+Filter.saltpepper(影像檔);
+````
+
+### median_filter : 3 * 3 中值濾波器
+````java
+Filter.median_filter(影像檔);
+````
+
+### mean_filter : 3 * 3 平均濾波器
+````java
+Filter.mean_filter(影像檔);
+````
+
+### sobel_filter : Sobel 取邊緣
+````java
+Filter.sobel_filter(影像檔)
+````
+### scale_2_binary : 二值化（取平均做門檻值）
+````java
+Filter.scale_2_binary(影像檔);
+````