Exposure adjusting method based on target area analysis and acquisition device thereof

[0045] Example 1

[0046] An exposure adjustment method based on target area analysis includes the following steps:

[0047] Step 1: Pre-set the target brightness value and its upper limit and lower limit, the maximum and minimum system gain, and the maximum and minimum system exposure time;

[0048] Step 2: Collect an image through the acquisition device, divide the acquired image into a background area and a target area, determine the weight coefficient of each area based on the comparison of the average brightness of the two areas, and obtain the average brightness of the image;

[0049] (1) Divide the acquired image into several small areas, and divide the small areas into target area and background area according to their contrast;

[0050] Determine the target area and the background area according to the contrast of the vertical and horizontal brightness of two adjacent small areas;

[0051] The calculation formula of the contrast is:

[0052]

[0053] In the formula, ΔB r(i,j) Is the

[0073] Example 2

[0074] An image acquisition device for an exposure adjustment method based on analysis of a target area, comprising a first base 1, a shock absorbing device 23 is symmetrically provided at the bottom of the first base 1, a trough 23 is provided in the middle of the top of the first base 1, and a first base 1 The top of the base 1 is fixedly connected to the second base 2, and the third motor 24 is fixedly connected to the second base 2 and located inside the tank body 23. The output shaft of the third motor 24 is fixedly connected to the turntable 3, and the turntable 3 is symmetrically fixedly connected with The first support plate 7 and the third support plate 20, the third support plate 20 is provided with a first bevel gear 5, the first bevel gear 5 meshes with the second bevel gear 6, and the top of the second bevel gear 6 One end of the first threaded rod 8 is fixedly connected, and the other end of the first threaded rod 8 is placed in the bearing 10 fixed