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

Table 4

Estimation errors for observed and image obtained variables averages and standard deviations.

Symbol	Formal expression	Description
𝛿^𝑘𝑙	∑^𝑛𝑘1𝑒^𝑘𝑙𝑗𝑛𝑘	Leaf length average deviation in the group 𝐺𝑘(𝑙).
𝛿^𝑘ℎ	∑^𝑛𝑘1𝑒^𝑘ℎ𝑗𝑛𝑘	Leaf width average deviation in the group 𝐺𝑘(𝑙).
𝛿^𝑘𝑎	∑^𝑛𝑘1𝑒^𝑘𝑎𝑗𝑛𝑘	Leaf area average deviation in the group 𝐺𝑘(𝑙).
𝛿𝑙	∑^𝑛1𝛿^𝑘𝑙𝑛	Leaf length average deviation in 𝐶𝐺.
𝛿ℎ	∑^𝑛1𝛿^𝑘ℎ𝑛	Leaf width average deviation in 𝐶𝐺.
𝜎𝛿𝑙	∑^𝑛𝑘1𝑒^𝑘𝑙𝑗−𝛿^𝑘𝑙^2𝑛𝑘−1^1/2	Standard deviation of 𝑒^𝑘𝑙𝑗.
𝜎𝛿ℎ	∑^𝑛𝑘1𝑒^𝑘ℎ𝑗−𝛿^𝑘ℎ^2𝑛𝑘−1^1/2	Standard deviation of 𝑒^𝑘ℎ𝑗.