Compressed sensing based color imaging device and compressed sensing based color imaging method

Abstract

The invention discloses a compressed sensing based color imaging device and a compressed sensing based color imaging method. The compressed sensing based color imaging device comprises a PC (personal computer), a DLP (digital light projector), a target image, a single-pixel photon detector and a data collection and control module. The PC, the DLP and the single-pixel photon detector are connected with the data collection and control module. The PC generates a two-dimensional random binary projected intensity image. The data collection and control module controls the DLP to perform binary intensity image projection on the target image under red, green, blue and white structured light sequentially to acquire digital signals of the red, green, blue and white structured light respectively and send the digital signals to the PC, reconstructs the signals of the red, green, blue and white structured light through compressed sensing to acquire four monochrome gray level images, and performing color fusion on the four monochrome gray level images to acquire a final color image. The compressed sensing based color imaging device and the compressed sensing based color imaging method have the advantages that light filters are not needed, and simple structure and low cost are achieved; sampling frequency can be reduced, and color fidelity can be guaranteed without reduction of image resolution.

Description

technical field [0001] The invention belongs to color imaging technology, in particular to a color imaging device and method based on compressed sensing. Background technique [0002] DLP (digital light projector) mainly uses DMD (digital micromirror chip) for projection, which includes a DMD and LEDs of three different colors: red, green, and blue ([1] Tian Wenchao, Jia Jianyuan. DMD and DLP display technology [J] .Journal of Instrumentation, 2005(z2):358-359.). DMD arranges a matrix composed of microlenses (precise, miniature mirrors) on a semiconductor chip, each microlens controls a pixel in the projection screen, and the number of microlenses matches the resolution of the projection screen. These micromirrors can change the angle quickly under the control of digital driving signals. Once the corresponding signal is received, the micromirrors will be tilted by 10°, thereby changing the reflection direction of the incident light. A micromirror in the projecting state is...

AI Technical Summary

Problems solved by technology

However, the three colors are stored at the same resolution, and the amount of data is still very large

Moreover, since human eyes have different resolution capabilities for brightness and color, if the brightness and color signals are sampled and reconstructed with the same resolution, there will be a large measurement redundancy, and a lot of waste will be wasted in the subsequent signal processing process. time and memory

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