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The technology employs an alternate electronic technique for estimating distance and object depth using shuttered CMOS sensors, intended to overcome some practical and technological limitations which affect current technologies and methodologies. Existing systems make use of a method called phase sampling, involving the analysis of phase shifts exhibited by optical signals from a light source. While this is a generally viable method it is prone to three major issues that can affect estimation, phase wrapping, multi-path interference, and accuracy issues in situations with low signal-to-noise ratios. The invention avoids these problems by employing tone and frequency sampling from the dual frequency of a signal, facilitated by an amplitude-modulated light source and measures of incident light recorded on individual pixels.