Monotone Data Visualization Using Rational Trigonometric Spline Interpolation

Figure 8

𝐶¹ monotone rational trigonometric bicubic function with 𝛼_𝑖,𝑗=12,  𝛿_𝑖,𝑗=12,  𝛼_𝑖,𝑗+1=13,  𝛿_𝑖,𝑗+1=14,  𝛼_𝑖,𝑗=10,  𝛿_𝑖,𝑗=10,  𝛼_𝑖+1,𝑗=15,  𝛿_𝑖+1,𝑗=13.