Spectral Filter for Grayscale Colony Detection
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Solution Overview
Problem
Current colony analysis systems equipped with grayscale image detectors struggle to reliably distinguish between colonies of different colors, often missing or incorrectly identifying certain types due to the lack of wavelength or color information in the detected light.
Innovation Solution
A system is introduced that includes a spectral filter in the optical path from a light source to a grayscale image detector, configured to enhance the intensity difference between spectrally distinct colonies, allowing for their identification and robotic picking. The filter increases the visibility of specific colony types by altering the light intensity, enabling better differentiation in grayscale images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a grayscale image detector is used to detect colonies, then the system is simpler and less expensive, but the system cannot reliably distinguish between colonies of different colors
Solution Approach 1:
A spectral filter is introduced as an intermediary component in the optical path between the light source and the grayscale image detector. The filter selectively transmits certain wavelengths of light while blocking others, creating enhanced intensity differences between colonies of different colors. This allows the simple grayscale detector to indirectly detect color differences that would otherwise be invisible to it.
Solution Approach 2:
The system changes the optical parameters (wavelength transmission characteristics) by introducing a spectral filter with specific transmission properties. The filter is configured to transmit light wavelengths that maximize the intensity difference between spectrally distinct colonies, thereby transforming the grayscale detector's limited capability into an effective color differentiation tool through parameter optimization.
2Device complexity
If no spectral filter is used, then the optical path is simpler, but spectrally distinct colonies cannot be reliably distinguished
Solution Approach 1:
The spectral filter serves as a mediating element that enhances the contrast between different colony types by selectively transmitting wavelengths that maximize intensity differences. This intermediary component enables reliable colony identification without requiring a complex color-sensitive detector.
Solution Approach 2:
By changing the spectral transmission parameters of the optical path through the filter, the system optimizes the intensity contrast for distinguishing spectrally distinct colonies. The filter's transmission characteristics are specifically chosen to improve reliability of colony differentiation while maintaining optical path simplicity.
3Productivity
If a grayscale detector measures only light intensity without wavelength information, then the detection process is faster and simpler, but colonies of different colors may be missed or misidentified
Solution Approach 1:
The spectral filter acts as a pre-processing intermediary that encodes color information into intensity differences before the light reaches the grayscale detector. This allows the fast, simple detector to indirectly capture color-based colony differentiation without sacrificing detection speed.
Solution Approach 2:
The spectral filter performs preliminary spectral separation and intensity enhancement before the detection step. By pre-enhancing the intensity differences between spectrally distinct colonies in the optical path, the system enables accurate colony identification using a simple grayscale detector, maintaining high detection speed while improving accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively identifies and isolates spectrally distinct colonies by enhancing the intensity contrast, allowing for accurate identification and robotic picking, even when colonies would otherwise be indistinguishable in grayscale images.
Implementation Method 1
A filter may be received in an optical path extending from a light source to a grayscale image detector. The filter may be configured to detect an intensity difference between a first type of colony and a spectrally distinct second type of colony.
Data Source
AI summary
System, including methods and apparatus, for identifying and picking spectrally distinct colonies. In an exemplary method, a filter may be received in an optical path extending from a light source to a grayscale image detector. The filter may be configured to increase an intensity difference between a first type of colony and a spectrally distinct second type of colony. Colonies including both types may be received in the optical path. An image of the colonies may be obtained with the grayscale image detector. At least one of the types of colony may be identified in the image. One or more colonies of the at least one type may be picked robotically.