Circuit for controlling image capturing device and associated control method
AssigneeXiamen Sigmastar Technology Ltd
InventorChih Hau Hu
Life of this patent
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Abstract
A control method for an image capturing device is disclosed. The image capturing device includes a sensing circuit, an analog gain adjustment circuit using an analog gain, and an analog-to-digital converter (ADC). The control method includes: using a digital gain adjustment circuit to adjust, according to a digital gain, a digital image generated by the ADC to generate an adjusted digital image; generating the analog gain and the digital gain according to the digital image, and calculating intensity information of an infrared component in the digital image; and determining an image adjustment parameter according to the analog gain, the digital gain and the intensity information of the infrared component to perform image processing on the adjusted digital image.
Claims18
A circuit for controlling an image capturing device, the image capturing device comprising a sensing circuit, an analog gain adjustment circuit and an analog-to-digital converter (ADC), the sensing circuit providing an input image having an infrared component, the analog gain adjustment circuit adjusting the input image according to an analog again to generate an adjusted input image, the ADC performing analog-to-digital conversion on the adjusted input image to generate digital image data;
- the circuit comprising:
- a digital gain adjustment circuit, adjusting the digital image data according to a digital gain to generate adjusted digital image data;
- a calculation and control circuit, generating the analog gain and the digital gain according to the digital image data, and calculating intensity information of the infrared component;
- a look-up table (LUT) circuit, determining an image adjustment parameter according to the analog gain, the digital gain, and the intensity information of the infrared component;
- and
- an image processing circuit, performing image processing on the adjusted digital image data according to the image adjustment parameter to generate output image data.
A control method for an image capturing device, the image capturing device comprising a sensing circuit, an analog gain adjustment circuit and an analog-to-digital converter (ADC), the sensing circuit providing an input image having an infrared component, the analog gain adjustment circuit adjusting the input image according to an analog again to generate an adjusted input image, the ADC performing analog-to-digital conversion on the adjusted input image to generate digital image data;
- the control method comprising:
- using a digital gain adjustment circuit to adjust the digital image data according to a digital gain to generate adjusted digital image data;
- generating the analog gain and the digital gain according to the digital image data, and calculating intensity information of the infrared component;
- determining an image adjustment parameter according to the analog gain, the digital gain, and the intensity information of the infrared component;
- and
- performing image processing on the adjusted digital image data according to the image adjustment parameter to generate output image data.
Dependencies are inferred from the claim text.