Method of sketch profiling with spline curves for footwear design

Abstract

The method of profiling sketches with spline curves with curvilinear guide paths is proposed in the work. The variants of possible combinations of types of spline sections are considered, all necessary variants of point positions for detection of a spline curve are given. The advantages of the developed method are the simplification of the design procedure of the proposed type of curves while providing more accurate representation of the real details, the mobility in controlling the shapes of curvilinear curves of sketch parts with a decrease in the order of the curve, including the curvature of different directions, which is in particular of first importance for all curves of the characteristic of shoe last sketches and conditional unfolding of the shoe last. KEYWORDS: method of profiling, sketch, spline, designing, footwear METODĂ DE TRASARE A SCHIŢELOR UTILIZÂND CURBE SPLINE PENTRU PROIECTAREA ÎNCĂLŢĂMINTEI REZUMAT. În lucrare se propune o metodă de trasare a schiţelor utilizând curbele spline cu traiectorii curbilinii. Sunt luate în considerare variante ale posibilelor combinaţii de tipuri de secţiuni spline şi sunt date toate variantele necesare ale poziţiilor punctelor pentru detectarea unei curbe spline. Avantajele metodei dezvoltate sunt: simplificarea procedurii de proiectare a tipului de curbe propus oferind în acelaşi timp o reprezentare mai precisă a detaliilor reale, mobilitatea în controlul formelor curbelor de tip curbiliniar ale părţilor schiţei cu o scădere în ordinea curbei, inclusiv curbarea în direcţii diferite, care are o mare importanţă pentru toate curbele specifice schiţei calapodului şi desfăşurarea condiţională a calapodului.

Shoe Last Customization: A Systematic Review

“…One method of using anthropometric data is to create a shoe last gradation system through direct construction based on a virtual middle foot [40]. Based on standard feet, the method of morphological gradation was derived.…”

“…The first concerns the modeling of the shoe last for healthy feet, and the second considers the dysfunctions that occur with the feet, caused by poor sizing or congenital foot diseases, among other factors. Shoe last for healthy feet is modeled in the works [30][31][32][33][34][36][37][38][39][40][41][42]. The study by Pang et al [37] included adaptation to the athlete's foot.…”

“…This research question aims to acquire knowledge that includes an overview of data acquisition methods for creating a shoe last model. As a rule, this is anthropometric data including basic measurements of the client's feet -lengths, girths, and, in some cases, consideration of biomechanical, ergonomic, and aesthetic parameters [34][35][36][38][39][40]. Data can be acquired manually using a ruler or a Brannock instrument when capturing customer foot measurements.…”

“…The second method involves creating algorithms or using machine learning, neural network, or artificial intelligence [33,36] to create shoe lasts based on curvatures that match the human foot as closely as possible. The last method is surface modeling based on the foot model from scan [30,35,40,[42][43].…”

The Design of Individual Orthopedic Insoles for the Patients with Diabetic Foot Using Integral Curves to Describe the Plantar Over-Pressure Areas

“…The description of complex geometric shapes using mathematical research methods is considered in the works of scientists. Objects with complex geometric shapes—foot and boot-tree—are of the greatest complexity for design [ 10 , 11 ]. The description of the geometric shapes of the boot-tree is presented in the works [ 12 , 13 ].…”