Captain Wes Morgan was incorrectly penalised for handling when the ball struck his face while Pearson felt the decision against Danny Simpson for the second spot-kick was also harsh.
Steven Gerrard scored both penalties and although Leicester fought back with two goals in 100 seconds after the break from substitute David Nugent and Jeffrey Schlupp, the Foxes boss was unhappy they found themselves in a difficult position due to officiating errors from Mike Jones.
Pearson said: "I see what everyone sees, things happen very quickly.
"It is going to fuel the debate again about use of technology because we (the Leicester dugout) have the benefit of being able to see it in a few seconds and know what has happened and it is unfortunate to have to deal with two occasions like that in the first half.
"I am not going to go down the route of being ultra-critical because at the end of the day the game could be a lot easier by utilising what is available to us, but we don't."
On Simpson's penalty he added: "It hit his hand but it is how the rules are interpreted and whether there is a level of consistency.
"You can see from the player's reaction it is unintentional but I fully accept it hits his hand.
"There were other occasions at both ends where you could say if that one is given why aren't the others.
"This is the problem the game has. It exposes human beings to making errors - that is not a criticism of the officials but we could make it much easier for everyone concerned if technology was utilised.
"It takes a couple of seconds. Even when the whistle has gone and players are remonstrating with the officials it could be reviewed instantaneously.
"It (introduction of technology) is not inevitable but do I think it should be there, yes."