Information communication method
An information communication method and information acquisition technology, applied in image communication, television, short-distance systems, etc., can solve problems such as difficult cost and insufficient computing power
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Embodiment approach 1
[0634] figure 1 It is a figure which shows the principle of Embodiment 1. Figure 2 to Figure 14 It is a figure which shows an example of the operation|movement of Embodiment 1.
[0635] figure 1The exposure time of each row 1 of the image sensor shown in (a) is delayed for each row. At normal shutter speeds, since the lines overlap in time, the optical signals at the same time are mixed in the lines, making it impossible to distinguish. Here, in the case of shortening the shutter opening time, if the exposure time is shortened below a certain shutter speed, then as figure 1 (a) Since there is no overlapping, the optical signals can be read out by temporally separating the optical signals for each row.
[0636] If given in this state figure 1 The optical signal of "1011011" as in the upper part of (a), the first optical signal of "1" enters the light during the shutter opening time of line 1, so it is photoelectrically converted in line 1, as figure 1 "1" of the electric...
Embodiment approach 2
[0695] (signal transmission via phase modulation)
[0696] Figure 15 It is a time chart of the transmission signal of the information communication apparatus of Embodiment 2.
[0697] exist Figure 15 Among them, the reference waveform (a) is a clock signal of period T, and is a reference of the timing of the transmission signal. Transmission symbol (b) represents a symbol sequence created based on the transmitted data sequence. Here, as an example, the case of 1 bit per 1 symbol is shown, so it is the same as the binary number of the transmission data. The transmission waveform (c) is a transmission waveform obtained by phase-modulating the reference waveform according to the transmission symbol, and the transmission light source is driven according to this waveform. The phase modulation is performed by shifting the phases of the reference waveforms according to the symbols. In this example, symbol 0 is allocated with a phase of 0° and symbol 1 with a phase of 180°.
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Embodiment approach 3
[0718] Embodiment 3 will be described below.
[0719] (Observation of brightness of light emitting part)
[0720] There is proposed an imaging method that does not expose all imaging elements at the same timing when capturing one image, but starts and ends exposure at different timings for each imaging element. Figure 21 This is an example in which the imaging elements arranged in one row are simultaneously exposed, and the exposure start timings are shifted in the order of the row from the closest to the farthest, and images are taken. Here, it is called an exposure line of an imaging element exposed at the same time, and a line of pixels on an image corresponding to the imaging element is called a bright line.
[0721] When using this imaging method to image a flashing light source on the entire surface of the imaging element, as in Figure 22 In this way, bright lines (lines of brightness and darkness of pixel values) along the exposure line appear on the captured image....
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