TYPE: COP
TITLE: Radial Blur COP

This operation does a radial or angular blur on the input image.

A Radial blur appears to blur away or towards a central point. An angular blur
blurs around a central point. Both operations can be done simultaneously to
produce a corkscrew-like effect.

This operation is implemented in VEX. Right click on the dialog '?' help for 
more help on VEX. 

Parameters
    Quality           - Affects the smoothness of the blur. Higher qualities
                        take more samples per pixel to blur.
    Radial Blur       - The amount of radial blur to apply. 1 = half the
                        diagonal length of the image, 0 = none.
    Angular Blur      - The amount of angular blur to apply, in degrees.
    Angular Bias      - The bias of the rotation. '0' blurs the image from the
                        current orientation N degrees. '1' blurs the image from
                        the current orientation minus N degrees to the current
                        orientation. '0.5' centers the blur around the current
                        orientation.
    Center            - The center point of the blur.
    Start Blur Scale  - The start blur factor. The first blurred pixel is
                        multiplied by this value.
    End Blur Scale    - The end blur factor. The last blurred pixel is
                        multiplied by this value.
    Blur Dropoff      - The interpolation function for pixel samples in
                        between the start and end pixels.
    Filtering         - The pixel sampling filter.
	None          - Quick, low quality filter.
	Bilinear      - Medium quality filter.
	Full Filtered - Slow, high quality filter.

    Correct for Image Aspect - If on, the blur is adjusted so it appears
			       circular if the image aspect ratio isn't square.
    Outside Bounds    - Specifies the sampling method for pixels outside the
                        image.

   Mask & Plane Scope, Frame Scope page:
        Overview - See extra help (Middle click on the dialog '?' help).

Local Variables:
    L   - Sequence length
    S   - Start of sequence
    E   - End of sequence
    IL  - Input sequence length
    SR  - Sequence frame rate
    NP  - Number of planes in sequence
    W,H - Width and height of image
    I   - Image index (0 at start frame)
    IT  - Image time (0 at start frame)
    AI  - Current plane array index
    PI  - Current plane index
    PC  - Num of channels in current plane

See Also: Edge Blur (edgeblur), Blur, Sharpen
