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International Journal of Bioprinting Bacteriorhodopsin-embedded hydrogel device

Figure 7. Pattern recognition of images containing Latin letters. (A) Schematic of image pattern recognition. An image containing the letter “T” was
pixelized into a 5 × 5 pixel array, and each row of pixels was encoded into a series of Boolean values. The pixel values were transformed into a square wave
signal, where “0” corresponded to a low voltage level and “1” corresponded to a high voltage level. The signal was then sent to the laser generator, and the
photocurrent response was recorded. (B) Pattern recognition results of Latin letters. The letter combination “THU” was pixelized, encoded, and used as
the light stimulus. A total of 15 photocurrent response signals were utilized to reconstruct the image pattern.

encoding the image pattern, it is possible to transform it brightness within the photocurrent produced by the br-
into a light signal with varying light intensity for binary embedded hydrogel. The amplitude and the temporal
or grayscale images using TTL or AC modulation of a layout of the electrical stimuli can be customized by
laser generator. This process converts spatial-encoded modulating the light source’s intensity, while the spatial
brightness information into temporal-encoded brightness
information. The varying light intensity aligns effectively layout can be achieved through alterations in the shape of
with the differential response characteristics of the br, the br-embedded hydrogel structure and the concentration
thereby encoding the information regarding changes in of br.

Volume 10 Issue 6 (2024) 527 doi: 10.36922/ijb.4454