Classification Quality Control

checking the quality of the unsupervised classification is an extremely important step with all automated mineralogy systems the mineralogy of samples will vary from sample to sample and it is important to identity these changes sometimes these changes may be subtle changes, such as a primary sulphide may develop an alteration aim of a secondary mineral, for example anglesite (pbso4) rim around galena (pbs) grains such rims can affect the flotation recovery of galena and is there important to identify these textures if a mineral library was used without anglesite and the classification threshold allowed it, then anglesite can incorrectly classify as galena due to the similar of the two mineral spectra this results in the failure of identifying the presence of anglesite amics has three useful sub tabs assoicated with the reference tab to help with classification quality control list sub tab list of all the parent groups in the mineral reference list displaying as a simple list view to show classification states (high, normal and low), bse check and energy check parameters bse sub tab shows the bse grey value distribution of a selected spectrum in the mineral reference list reliability sub tab shows the distribution of matching reliability value from 100 to the user set matching threshold limit another useful feature for classication quality control is the particle information sub window which shows the collected spectrum's matching values with spectra in the mineral reference library and if the bse and energy check conditions are met if multiple mineral reference spectrum match, it will show the matches in order from the highest to lowest match to use this feature xray points" overlay needs to be activated the detail button will open the xray spectrum pop up window this pop up window will show the bse (grey value) assigned to the segmented region this x ray spectrum is assoicated with this window will allow you to carefully examine the collected spectrum by holding down the shift key and selecting a region with the right mouse click button the energy range can also be manually defined by entering the values in the range box the percentage is then the percentage of the x ray spectrum in the defined range (excluding the classify zero peak (ev) region) this is the value used for energy check classification