Brightness detection method and apparatus, control method and apparatus for photographic apparatus, and medium

A control method for a photographic apparatus, comprising:

• selecting a preset detection group from at least two detection groups in a brightness detection circuit, and determining a first brightness detection result by using the preset detection group, wherein the preset detection group corresponds to a target brightness range, and a ratio of a brightness span value corresponding to the target brightness range to a number N of sampling points meets a preset precision requirement;
• and wherein N digital voltages are used to represent a brightness value corresponding to the target brightness range, and a detection precision of the target brightness range is the ratio of the brightness span value to the number N of the sampling points;
• determining a working mode of the photographic apparatus based on the first brightness detection result;
• wherein the working mode comprises:
• a daytime mode or a night mode;
• and wherein the night mode comprises:
• a night mode with white light supplementation or a night mode without white light supplementation;
• in response to that the working mode of the photographic apparatus is the daytime mode or the night mode with white light supplementation, and an absolute value of a difference value between the first brightness detection result and an upper limit value of the target brightness range corresponding to the preset detection group exceeds a difference threshold, determining an exposure parameter of an image in the photographic apparatus based on the first brightness detection result;
• or
• in response to that the working mode of the photographic apparatus is the daytime mode or the night mode with white light supplementation, and the absolute value of the difference value between the first brightness detection result and the upper limit value of the target brightness range corresponding to the preset detection group is less than the difference threshold, switching from the preset detection group to a third target detection group, determining a second brightness detection result by using the third target detection group, and determining the exposure parameter of the image in the photographic apparatus based on the second brightness detection result, wherein
• the brightness detection circuit comprises:
• a photosensitive diode, a switch, and the at least two detection groups, the switch is connected to the photosensitive diode, and the detection group comprises:
• a sampling resistor and a capacitor connected in parallel;
• wherein the at least two detection groups have corresponding brightness ranges obtained by dividing a preset brightness range;
• and the determining the first brightness detection result by using the preset detection group or the determining the second brightness detection result by using the third target detection group comprises:
• performing voltage detection on the preset detection group or the third target detection group, and performing analog-digital conversion on an obtained voltage detection result to obtain a digital voltage, and determining the first brightness detection result or the second brightness detection result based on the digital voltage.

An electronic device, comprising:

• a processor;
• and
• a memory, having stored thereon an executable code, which, when executed, cause the processor to perform a brightness detection method, wherein a brightness detection circuit is used to perform brightness detection, wherein the brightness detection circuit comprises:
• a photosensitive diode, a switch, and at least two detection groups, the switch is connected to the photosensitive diode, and the detection group comprises:
• a sampling resistor and a capacitor connected in parallel;
• wherein the at least two detection groups have corresponding brightness ranges obtained by dividing a preset brightness range;
• and the method comprises:
• selecting a target detection group from the at least two detection groups;
• controlling the switch to be connected to the target detection group;
• performing voltage detection on the target detection group, and performing analog-digital conversion on a voltage detection result to obtain a digital voltage;
• wherein the analog-digital conversion corresponds to a number N of sampling points;
• wherein the at least two detection groups comprise a preset detection group, the preset detection group corresponds to a target brightness range, and a ratio of a brightness span value corresponding to the target brightness range to the number N of the sampling points meets a preset precision requirement;
• and wherein N digital voltages are used to represent a brightness value corresponding to the target brightness range, and a detection precision of the target brightness range is the ratio of the brightness span value to the number N of the sampling points;
• and
• determining a brightness detection result based on the digital voltage.