A digital image capturing and processing system including an image formation and detection (IFD) subsystem having a linear image sensing array and optics providing a field of view (FOV) on the linear image sensing array. A spectral-mixing based illumination subsystem produces a first field of visible laser illumination produced from an array of visible VLDs, and a second field of invisible laser illumination produced from an array of IR laser diodes (LDs) that spatially overlap and intermix with each other so as to produce a composite planar laser illumination beam which is substantially with the FOV of the linear image sensing array. An illumination control subsystem controls the spectral mixing of visible and invisible laser illumination produced from the spectral-mixing based illumination subsystem, by adaptively controlling the relative power ratio (VIS/IR) of said fields of visible and invisible laser illumination. An image capturing and buffering subsystem captures and buffers images from the image sensing array. An automatic object detection subsystem automatically detects the an object moving through at least a portion of the FOV of the linear image sensing array, and generation a control activation signal. A control subsystem, responsive to the control activation signal, controls the operations of the subsystems within the illumination and imaging station.