Frame Interpolation

Example - Interpolated Frames

Uses

• Recreate a damaged or missing frame
• Reveal hidden motion between frames

How it works

1. Drag and drop, or click to upload Before Frame and After Frame PNG files
2. Set Split Count to choose the number of new Between Frames
   • Each split doubles the frame count
3. Click Interpolate
4. The Animated Preview panel will show a GIF of the original and newly created frames
5. The Download box gives access to
   • Animated GIF
   • ZIP of original and interpolated frames
   • TXT report

Understanding Frame Interpolation

Example: 1 Split Creates 1 New Frame:

• B is the Before frame, A is the After frame
  • B-------A
• X is the new frame, splitting the time between B and A @ 50%
  • B---X---A

Example: 3 Splits Create 7 New Frames:

• B is the Before frame, A is the After frame
  • B-------------------------------A
• X is the frame for the first split, dividing the time between B & A @ 50%
  • B---------------X---------------A
• Y & Y are the frames for the second split, dividing the times between B & X and X & A @ 25% and 75%
  • B-------Y-------X-------Y-------A
• Z, Z, Z & Z are the frames for the third split, dividing the times between B & Y, Y & X, X & Y, Y & A @ 12.5%, 37.5%, 62.5% and 87.5%
  • B---Z---Y---Z---X---Z---Y---Z---A

The number of interpolated frames is computed by this formula:

• F=2**S-1, where
• F is the count of interpolated frames
• S is the split count

Tip: It can help to think of time intervals instead of frames

• At first there's 1 time interval between the before and after frames
• The first split divides time into 2 intervals, creating 1 interpolated frame
• A second split divides those into 4 intervals, creating 2 interpolated frames
• A third split divides those into 8 intervals, creating 4 interpolated frames
• The resulting 8 intervals minus the original one equals 7 new intervals / frames