Think of it this way: your eye is already doing this, converting photons into neural impulses. We just made the process visible. Somewhere between the lens and the brain, light becomes electricity -- a continuously varying signal that carries the shape, brightness, and color of everything you see.
The first television engineers understood this intuitively. They built machines that could scan a scene line by line, top to bottom, converting each point of light into a proportional voltage. Bright areas produced high voltages. Dark areas produced low ones. And the signal that emerged -- that undulating, complex waveform -- contained the image in the same way a vinyl groove contains a symphony.
What makes this remarkable is not the technology itself but the translation. An image, which exists in two dimensions of space, is collapsed into a single dimension of time. Every frame becomes a sequence. Every pixel becomes a moment. The waveform monitor -- that green trace sweeping endlessly left to right -- shows you this translation happening in real time.
If you've never watched a waveform monitor, you're missing something beautiful. It's the image stripped of its pretense, reduced to pure information. Peaks where the highlights burn. Valleys where the shadows pool. And in between, the infinitely complex topology of a visual field rendered as a single continuous line.