This enumeration specifies types of convolution result.

Values:

IG_CONV_RESULT_RAW	The result is stored as is.
IG_CONV_RESULT_ABS	The absolute value of the signed result is stored.
IG_CONV_RESULT_8BIT_SIGNED	The result is stored as 8-bit signed values.
IG_CONV_RESULT_SIGN_CENTERED	The result is stored as 8-bit signed, but 0 is equal to 0x7F. Positive numbers are from 0x7E to 0x00. Negative numbers are from 0x80 to 0xFF. This is used for images that are to be used as background tiles or watermarks.