color representing the metric value. (b) CC$_{1/2}$, the green dashed line shows the $q$ for the CC$_{1/2} = 0.5$ cutoff; (c) PRTF, dashed line shows the typical PRTF$=1/e$ cutoff, and (d) FSC, where the metric never went below the standard half-bit criterion. Each plot is the average of 10 random subsets.[]{data-label="fig:split_metrics"}](FSC_combined.pdf "fig:"){width="0.5\columnwidth"}
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In order to summarise the results as a function of resolution for many different photon dilution levels, in Figs. \[fig:split\_metrics\](b)–\[fig:split\_metrics\](d) we plot each metric in grayscale versus both selection fraction and $q$, where color represents the metric value. The green dashed line in Fig. \[fig:split\_metrics\](b) marks the somewhat arbitrarily chosen CC$_{1/2} = 0.5$ cutoff, and shows how the resolution of the intensity reconstruction becomes progressively worse as $p$ is reduced. One cause of this reduction is just the graininess of the reconstruction due to insufficient total signal. Similarly the green line in Fig. \[fig:split\_metrics\](c) represents the the typical PRTF$=1/e$ cutoff. The step decrease in resolution shown by the PRTF in Fig. \[fig:split\_metrics\](c) occurs when the overall PRTF decreases to the point where the next local minima falls below cutoff threshold, Fig. \[fig:full-metrics\]. The resolution estimated by each metric is tabulated in Table \[table:dilution\].

From 