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DMD control method in high dynamic range imaging

A technology with high dynamic range and control method, which is applied in the direction of image communication, color TV parts, TV system parts, etc., can solve the problems of multiple micromirror flipping, achieve the effect of improving accuracy and reducing light pollution

Inactive Publication Date: 2014-12-03
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The present invention provides a method for controlling DMD in high dynamic range imaging in order to solve the problem that the existing DMD light intensity modulation technology easily leads to multiple micromirror flips in one frame of light intensity modulation

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  • DMD control method in high dynamic range imaging
  • DMD control method in high dynamic range imaging
  • DMD control method in high dynamic range imaging

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specific Embodiment approach 1

[0022] Specific implementation mode 1. Combination Figure 1 to Figure 3 In this embodiment, the control method of DMD in high dynamic range imaging includes constraints on light intensity modulation weights and constraints on the duration of each bit of the binary value of DMD light intensity modulation weights within one frame time;

[0023] Constraints on light intensity modulation weights:

[0024] In high dynamic light intensity modulation, dimming a certain saturated pixel only needs to adjust its pixel value to the sensitive response range of the image detector itself, which is generally the critical saturation value and 1 / 2 critical saturation of the image detector Between values, this is a wide interval, and there is a double relationship between the upper limit and the lower limit of the interval, so the step of the light intensity modulation weight can adopt a double relationship, and the light intensity modulation weight can be set to several fixed values. Set the...

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Abstract

The invention relates to a DMD control method in high dynamic range imaging, relates to DMD light intensity modulation and control manners in the imaging detection field of high-dynamic-range radiation scenes, and aims at solving the problem that a present DMD light intensity modulation technology tends to cause multiple times of micromirror overturn in one frame of light intensity modulation. The DMD control method comprises the steps of limiting a light intensity modulation weight, and limiting the continuous time of each bit of a binary value of the light intensity modulation weight within one frame. The DMD control method can reduce the overturn times of the DMD in the imaging detection of high-dynamic-range radiation scenes, and improves the DMD light modulation precision.

Description

technical field [0001] The invention relates to the field of imaging detection of high dynamic radiation scenes, and relates to a DMD (Digital Micromirror Device) light intensity modulation method, specifically a method capable of reducing the number of flips of DMD in imaging detection of high dynamic radiation scenes and improving the dimming of DMD. Precision DMD control mode. Background technique [0002] Micromirror array DMD spatial light modulator combined with image sensor can solve the problem of simultaneous detection of strong and weak targets in high dynamic radiation scene imaging detection, obtain high dynamic image data, and expand the dynamic range of photoelectric imaging equipment to more than 130db. [0003] The DMD’s light intensity modulation of the incident light at a certain pixel needs to adjust the switching state and switching time of the micro-mirror at the corresponding position on the DMD to achieve the purpose of adjusting the light intensity of...

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Application Information

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IPC IPC(8): H04N5/235H04N5/232
Inventor 王延杰孙宏海李静宇陈怀章
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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