Trouble processing files > x3000px on macOS

Perhaps its the management of memory, but my average-processing-power MacBook seems to not be able to handle large-resolution files. If I convert the file and reduce the width (or likely the issue is file size), ./lenticular will run.

The program does not stop until later, and the error message I get is:

```
RECONSTRUCTING COLORS...
Computing image dimensions for color reconstructed frame...
rgbFrame.width = -1, rgbFrame.height = 1
ERROR: Won't allocate memory because 'width < 1 || heigth < 1'.
```