Light source spectrum obtaining method and device
An acquisition method and light source technology, which are applied in branch equipment, color signal processing circuits, TVs, etc., can solve the problem of low spectral accuracy of light sources, and achieve the effect of improving user experience.
Pending Publication Date: 2022-05-24
HUAWEI TECH CO LTD
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[0004] However, the light source spectrum obtained by the above method is essentially the integral result of the light source spectrum, object material reflectance spectrum and response function, not a pure light source spectrum, and the accuracy of the light source spectrum obtained by the above method is not high
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[0060] figure 1 This is an application scenario diagram provided by this embodiment of the present application. see figure 1 As shown, when the user takes a picture, the light emitted by the light source irradiates the subject, and the reflected light from the subject enters the camera. see figure 2 As shown, a Color Filter Array (CFA) and an RGB sensor are arranged in the camera. The CFA is set on the RGB sensor. The CFA includes three color filters of red, green and blue. The three color filters can be figure 2 Arranged as shown, the RGB sensor is divided into multiple pixels, and the filters on the CFA correspond one-to-one with the pixels on the RGB sensor. see image 3 As shown, taking a red filter as an example, assuming that the red filter corresponds to pixel A, after filtering by the red filter, only red light can reach pixel A, so the color channel corresponding to pixel A is the red channel . The RGB sensor is used to record the light intensity of the light...
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The invention provides a light source spectrum obtaining method and device. The method comprises the following steps: acquiring first information in a current shooting scene, wherein the first information comprises at least one of the following: a first image generated by an RGB sensor or the light intensity of light received by each pixel on a first multispectral sensor; inputting the first information into a first model to obtain the probability that the light source in the current shooting scene belongs to various light sources; and determining the spectrum of the light source in the current shooting scene according to the probability that the light source in the current shooting scene belongs to the various light sources and the spectrum of the various light sources. The light source spectrum obtained by the method is close to the real light source spectrum, and after white balance processing and color correction processing are performed according to the light source spectrum, the color of the image is closer to the real color of the shot object, so that the user experience is improved.
Description
technical field [0001] The present application relates to the field of terminals, and in particular, to a method and device for acquiring a spectrum of a light source. Background technique [0002] When the user takes a photo, the light intensity recorded by the RGB sensor is the integration result of the light source spectrum, the reflectance spectrum of the object material and the response function. When the light source is different, due to the different spectrum of the light source, the light intensity recorded by the RGB sensor is different, and the color value calculated according to the light intensity is also different, and the color of the visible image is greatly affected by the light source. The influence of the light source can be removed by white balance processing and color correction processing, and the light source spectrum can be used to guide the white balance processing and color correction processing. [0003] In the prior art, a multi-spectral sensor is...
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IPC IPC(8): H04N9/097H04N9/31H04N9/73H04N5/235H04M1/72439H04N23/16
CPCH04N9/3182H04N23/70H04N23/16H04N23/88H04M1/72439H04N9/31G06T1/20G06V10/60G06V10/56G06V10/143G06V10/761G06V10/762G06V10/764G06V10/774G06V10/82G06V20/00G06T7/90G06T2207/20076G06T2207/20081G06T2207/20072G06T2207/10036G06V10/763G06T2207/10024
Inventor 周茂森钱彦霖何名桂钱康杨永兴王妙锋
Owner HUAWEI TECH CO LTD