Day-mode-night-mode switching method and related monitoring camera apparatus

A day-mode-night-mode switching method applied to a monitoring camera apparatus in several color temperatures for switching the monitoring camera apparatus into a day mode or a night mode, the monitoring camera apparatus being electrically connected to a supplemental lighting apparatus adapted to emit a light within a specific spectrum for light compensation, the day-mode-night-mode switching method comprising:

• acquiring an equivalent exposure parameter of the monitoring camera apparatus;
• determining whether the equivalent exposure parameter conforms to a first mode switching condition when the monitoring camera apparatus is in the night mode;
• computing a light compensation exposure parameter of image content acquired by the monitoring camera apparatus and relevant to the specific spectrum of the supplemental lighting apparatus when the equivalent exposure parameter conforms to the first mode switching condition;
• computing a light compensation weight of the light compensation exposure parameter in each of the color temperatures to generate a compensation parameter;
• utilizing the compensation parameter to transform the equivalent exposure parameter into a predicted exposure parameter;
• and
• determining whether the predicted exposure parameter conforms to the first mode switching condition, and then keeping the monitoring camera apparatus in the night mode or switching the monitoring camera apparatus into the day mode according to a determination result.