Whether the camera aperture, shutter time and brightness value in the image are

[verger]

When the light is strong, the automatic shutter system selects a lower shutter time and a smaller aperture, but when the UAV takes a large number of photos, the automatic shutter time causes the object's brightness to be inconsistent, which makes photo stitching difficult.
So I wondered if it would be possible to calculate a constant based on the aperture and shutter time of the camera, multiply the constant by the photo, and make all objects appear the same brightness?

[Phil Harvey]

ExifTool calculates the LightValue for an image as a Composite tag.  LightValue accounts for changing shutter speed, aperture and ISO.  Presumably you could use some image editor like ImageMagick to normalize these values for a series of images by multiplying the image data by the appropriate constant.

- Phil