High Level Trigger for Electrons and Photons in CMS

The CMS experiment will take data at the LHC proton proton collider, running at a centre-of-mass energy of 14 TeV. The CMS electromagnetic calorimeter (ECAL) is made of about 76000 PbWO4 crystals. The possibility to use the measured events for the physics studies relies on the robustness and efficiency of the triggering procedure. In this report, the ElectronPhoton package of the ORCA framework (Object oriented Reconstruction for CMS Analysis) is presented and results from full simulation studies of the High Level Trigger procedures to reconstruct and select electrons and photons are given.