Image Processing Library Performance Specifications

The representative performance specifications that follow are results averaged over many repetitions of each function call. Data is in cache. Results were measured using a 200 MHz Pentium^® processor-based PC with a 256K second-level cache and a 200 MHz Pentium processor with MMX™ technology-based PC with a 256K second-level cache. The tests were run under Windows* 95 and Windows NT. All execution times are expressed in clocks/pixel/plane.

Selected Functions	Execution Times for Pentium® Processor	Execution Times for Pentium® Processor with MMX™ Technology
Add	15	4.2
Alpha Pre-Multiply	20.8	2.9
Alpha Composite	224	10.9
Convolve, 2D (5x5 kernel)	393	84.1
2D FFT, Complex, 64x64	139	130
2D DCT	263	99.9
Equalize Histogram	12.1	11.2
Color Twist	116	47.1
Rotate, 100 degr., nearest neighbor	80	29.3
Rotate, 100 degr., linear interpolation	229	61.1
Decimate by 3/5, nearest neighbor	12	11
Decimate by 3/5, linear interpolation	104	101