A Method for Calculating the Area of Zostera marina Leaves from Digital Images with Noise Induced by Humidity Content

Table 3

Approximation errors.

Symbols	Formal expression	Description
𝑒^𝑘𝑙𝑗	𝑙^𝑘𝑜𝑗−𝑙^𝑘𝑑𝑗	Difference of observed and image obtained leaf lengths in group 𝐺𝑘(𝑙).
𝑒^𝑘ℎ𝑗	ℎ^𝑘𝑜𝑗−ℎ^𝑘𝑑𝑗	Difference of observed and image obtained leaf widths in group 𝐺𝑘(𝑙).
𝑒^𝑘𝑎𝑗	𝑎^𝑘𝑜𝑗−𝑎^𝑘𝑑𝑗	Difference of observed and image obtained leaf areas in group 𝐺𝑘(𝑙).
𝑒^𝑘𝑚𝑐j	𝑎^𝑘𝑜𝑗−𝑎^𝑘𝑚𝑐j	Difference of observed and Monte Carlo estimated leaf areas in group 𝐺𝑘(𝑙).