Focusing method and camera equipment based on shooting scene
A technology for shooting scenes and camera equipment, which is applied in the field of focusing methods and camera equipment based on shooting scenes, and can solve problems such as dead focus and easy occurrence of virtual focus.
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Embodiment 1
[0109] The schematic flow chart of the focusing method based on the low-illuminance scene in Embodiment 1 of the present invention is as follows figure 1 shown, including the following steps:
[0110] S101: The imaging device determines a sensitivity gain value when acquiring the image data for the acquired image data.
[0111] Specifically, the imaging device converts the optical signal into an analog electrical signal through its photosensitive device, such as a CCD (Charge Coupled Device, charge coupled device) or a CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor) device, etc. before shooting; Convert the analog electrical signal to digital image data, such as the data in the RAW format file. Image data includes data of a plurality of pixels.
[0112] The imaging device can determine the sensitivity ISO when the image data is acquired, and then determine the gain value for gaining the sensitivity. Preferably, the camera device can u...
Embodiment 2
[0140] A schematic flow chart of the focusing method based on a simple scene in Embodiment 2 of the present invention is as follows figure 2 shown, including the following steps:
[0141] S201: For the acquired image data, the imaging device determines the number of feature components whose frequency is higher than a specified frequency among the focus feature values of the image data.
[0142] Specifically, the imaging device converts the image data into the frequency domain to obtain a plurality of frequency feature components of each pixel of the image data; according to a preset high-pass filter, the frequency feature components of each pixel are extracted from the frequency feature components of each pixel. a plurality of high-frequency characteristic components; according to the plurality of high-frequency characteristic components of each pixel, the focus characteristic value of the image data is determined.
[0143] Preferably, the imaging device determines a focus...
Embodiment 3
[0162] The flowchart of the focusing method based on the point light source scene provided by Embodiment 3 of the present invention is as follows: image 3 shown, including the following steps:
[0163] S301: The imaging device determines a focus characteristic value of the acquired image data.
[0164] Specifically, the imaging device converts the acquired image data into the frequency domain to obtain a plurality of frequency characteristic components of each pixel of the image data; according to a preset high-pass filter, from each frequency characteristic component of each pixel of the image data A plurality of high-frequency characteristic components of each pixel is extracted; and a focus characteristic value of the image data is determined according to the plurality of high-frequency characteristic components of each pixel.
[0165] Preferably, the imaging device determines a focus feature value of the image data, such as focus_value, according to the high-frequency fe...
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