To measure the actual size of the object, through the parameters in fc1 calibration matlab toolbox, fc2, cc1, cc2;
The fc1=f/dx; Fc2=f/dy;
Dx said x direction represent the actual distance of each pixel; I feel just calculate a dx, dy can measure the actual object distance (according to the pixel points and each pixel corresponding to the actual distance of dx, dy)
But after the parameter matrices of the matlab and how to evaluate dx, dy

CodePudding user response:

Wait for a great god reply, I also want to use this recently, strives for the pixel in the image corresponding to the actual physical distance

CodePudding user response:

Know the object and camera, the distance to the camera sensor parameter is the junior middle school mathematics, of course, to eliminate the error of distortion, etc

CodePudding user response:

Matlab can be used on visual programming?

CodePudding user response:

reference xiaogui592308244 reply: 3/f

matlab can be used on visual programming?

Matlab do mathematical model for processing image, function is very powerful

CodePudding user response:

Pixel length and the ratio of physical length we used to call K value, the unit is mm/pixel, for unit conversion; Project on commonly used the following ways are used to calculate K value:
1) calculated using regular calibration block: such as cylindrical, rectangular products, after the camera like with FindCircle (center and radius), PairEdgeDistance (edge to the distance, the side length) and the diameter or length of A pixel length, with A caliper measuring the length of the actual B, calculation can be concluded that K=A/B;
Number 2) known to the camera itself, such as 0.3 MP to 640 MP is 1600 * 1200 * 480, 2, and then measure the length of the camera FOV, with the latter, divided by the former can also be concluded that K value;

CodePudding user response:

Upstairs reply very incisive, educated

CodePudding user response:

Pixel length and the ratio of physical length we used to call K value, the unit is mm/pixel, for unit conversion; Project on commonly used the following ways are used to calculate K value:
1) calculated using regular calibration block: such as cylindrical, rectangular products, after the camera like with FindCircle (center and radius), PairEdgeDistance (edge to the distance, the side length) and the diameter or length of A pixel length, with A caliper measuring the length of the actual B, calculation can be concluded that K=A/B;
Number 2) known to the camera itself, such as 0.3 MP to 640 MP is 1600 * 1200 * 480, 2, and then measure the length of the camera FOV, with the latter, divided by the former can also be concluded that K value;

CodePudding user response:

Want to ask next, due to the camera installation error, measuring plane is not perpendicular with the camera, then how to get the

CodePudding user response:

It is concluded that after the K value?