initial commit and version 1.0

moviepy/video/fx/LumContrast.py

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+from dataclasses import dataclass
+
+from moviepy.Clip import Clip
+from moviepy.Effect import Effect
+
+
+@dataclass
+class LumContrast(Effect):
+    """Luminosity-contrast correction of a clip."""
+
+    lum: float = 0
+    contrast: float = 0
+    contrast_threshold: float = 127
+
+    def apply(self, clip: Clip) -> Clip:
+        """Apply the effect to the clip."""
+
+        def image_filter(im):
+            im = 1.0 * im  # float conversion
+            corrected = (
+                im + self.lum + self.contrast * (im - float(self.contrast_threshold))
+            )
+            corrected[corrected < 0] = 0
+            corrected[corrected > 255] = 255
+            return corrected.astype("uint8")
+
+        return clip.image_transform(image_filter)