A modification method of the image brightness of the photographing system, wherein the photographing system comprises an image capturing device, a moving object detection device, and a processing device;
- the image capturing device has an image capturing range;
- the moving object detection device has a detection range;
- the image capturing range partially overlaps with the detection range;
- the modification method of the image brightness of the photographing system comprises the following steps:
- step A:
- providing a corresponding relationship data, wherein the corresponding relationship data has a plurality of predetermined location data corresponding to a plurality of predetermined locations in the detection range of the moving object detection device;
- each of the plurality of predetermined location data comprises a predetermined image coordinate area corresponding to each of the plurality of predetermined locations;
- step B:
- detecting a location data of a moving object in the detection range by the moving object detection device;
- step C:
- obtaining the predetermined image coordinate area of one of the plurality of predetermined location data, which corresponds to the location data, from the corresponding relationship data by the processing device according to the location data;
- step D:
- controlling the image capturing device by the processing device for obtaining a first image captured by the image capturing device;
- step E:
- calculating a first global exposure parameter of a whole of the first image and calculating a first local exposure parameter of a first local image, which corresponds to the predetermined image coordinate area, of the first image by the processing device;
- step F:
- controlling the image capturing device by the processing device for obtaining another image captured by the image capturing device, wherein a whole of the another image has a global exposure parameter;
- a local image of the another image corresponding to the predetermined image coordinate area has a local exposure parameter, wherein the local exposure parameter is closer to an ideal exposure parameter than the first local exposure parameter;
- and
- Step G:
- outputting the another image as a frame of a video by the processing device;
- wherein in step A, each of the plurality of the predetermined location data of the corresponding relationship data comprises a predetermined distance and a predetermined angle;
- in step B, the location data comprises a detection distance and a detection angle;
- in step C, the processing device selects one of the plurality of predetermined location data, which comprises the predetermined distance corresponding to the detection distance and the predetermined angle corresponding to the detection angle, from the corresponding relationship data and then obtains the predetermined image coordinate area corresponding to the predetermined location data according to the predetermined location data being selected;
- wherein in step A, the predetermined distance of each of the plurality of predetermined location data of the corresponding relationship data has a predetermined distance range corresponding to the predetermined distance;
- the predetermined angle of each of the plurality of predetermined location data has a predetermined angle range corresponding to the predetermined angle;
- in step C, when the processing device determines that the detection distance of the location data is between the predetermined distance of adjacent two of the plurality of predetermined location data, the predetermined distance corresponding to the predetermined distance range which covers the detection distance is selected;
- when the processing device determines that the detection angle of the location data is between the predetermined angle of adjacent two of the plurality of predetermined location data, the predetermined angle corresponding to the predetermined angle range which covers the detection angle is selected.