Merge branch 'main' into feature/brightness-adjust

Author: saumya1317

.vscode/settings.json

@@ -1,3 +1,6 @@
 {
- "C_Cpp.errorSquiggles": "disabled"
+ "C_Cpp.errorSquiggles": "disabled",
+ "files.associations": {
+ "helpers.h": "c"
+ }
 }

README.md

@@ -129,6 +129,38 @@ If you apply the above algorithm to each pixel in the image, the result should l
 ```sh
 ./filter -v input.bmp output.bmp
 ```
+### 5.) The Vignette Algorithm
+
+The vignette filter gives an image a cinematic look by gradually darkening its corners. 
+
+**Algorithm:**
+1. Compute the center of the image (cx, cy).
+2. Calculate the maximum distance from the center to any corner (max_dis).
+3. For each pixel at (i, j):
+ - Calculate the Euclidean distance from this pixel to the center: dist = sqrt((j - cx)^2 + (i - cy)^2)
+ - Compute a vignette factor: vig = 1.0 - (dist / max_dis)
+ - Clamp vig between 0.0 (fully dark) and 1.0 (original color).
+ - Multiply the pixel's R, G, B values by vig to darken farther-away pixels more thoroughly.
+
+If you apply this algorithm, your resulting image will have gently darkened corners and an undisturbed/sunnier center.
+
+---
+
+### Usage
+
+To apply a filter via command-line:
+- `g`: grayscale
+- `s`: sepia
+- `r`: reflect
+- `b`: blur
+- `i`: invert
+- `v`: vignette
+
+For vignette:
+```
+./filter v input.bmp output.bmp
+```
+You can also chain multiple filters by supplying multiple tags (e.g., `./filter vg input.bmp output.bmp` for vignette then grayscale).
 
 You should not modify any of the function signatures, nor should you modify any other files other than helpers.c.
 

filter.c

@@ -120,7 +120,6 @@ int main(int argc, char *argv[])
  case 's':
  sepia(height, width, image);
  break;
-
  //invert
  case 'i':
  invert(height,width,image);

filter.exe

@@ -138,4 +138,4 @@ void vignette(int height, int width, RGBTRIPLE image[height][width]) {
  image[i][j].rgbtBlue = (int)(image[i][j].rgbtBlue * vig);
  }
  }
-}
+}

helpers.c

@@ -16,4 +16,4 @@ void reflect(int height, int width, RGBTRIPLE image[height][width]);
 void blur(int height, int width, RGBTRIPLE image[height][width]);
 
 // Brightness adjustment filter
-void brightness(int height, int width, RGBTRIPLE image[height][width], int value);
+void brightness(int height, int width, RGBTRIPLE image[height][width], int value);