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ii-pix
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kris 2022-07-16 22:00:42 +01:00
parent 99aa394196
commit e71352490d
1 changed files with 5 additions and 0 deletions
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common.pyx
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@ -5,14 +5,19 @@
cdef float clip(float a, float min_value, float max_value) nogil:
"""Clip a value between min_value and max_value inclusive."""
return min(max(a, min_value), max_value)
cdef inline float[::1] convert_rgb_to_cam16ucs(float[:, ::1] rgb_to_cam16ucs, float r, float g, float b) nogil:
"""Converts floating point (r,g,b) valueto 3-tuple in CAM16UCS colour space, via 24-bit RGB lookup matrix."""
cdef unsigned int rgb_24bit = (<unsigned int>(r*255) << 16) + (<unsigned int>(g*255) << 8) + <unsigned int>(b*255)
return rgb_to_cam16ucs[rgb_24bit]
cdef inline double colour_distance_squared(float[::1] colour1, float[::1] colour2) nogil:
"""Computes Euclidean squared distance between two floating-point colour 3-tuples."""
return (colour1[0] - colour2[0]) ** 2 + (colour1[1] - colour2[1]) ** 2 + (colour1[2] - colour2[2]) ** 2