Techniques for determining a grip layout to improve gun ergonomics
The present disclosure provides systems and techniques for determining a grip layout for a gun. The techniques include obtaining an image depicting a hand, obtaining calibration data associated with the image, calculating a real distance between a first landmark of the hand and a second landmark of the hand, and determining a grip layout for the gun based on the real distance between the first landmark and the second landmark. Calibration data may include a scale for the image or data that may be used to derive the scale, such as an object of known dimensions, an angular field of view, or a distance between the device used to capture the image and the hand. The grip layout may include a backstrap size, a sensor size, a sensor location on the gun, or any combination thereof.
1. A method of determining a grip layout for a gun, the method comprising:
obtaining an image depicting a hand and a fiducial marker indicating a scale;
calculating, based on the fiducial marker indicating the scale, a real distance between a first landmark of the hand and a second landmark of the hand;
determining that the real distance between the first landmark of the hand and the second landmark of the hand satisfies a size threshold; and
determining a backstrap size for the gun based on the real distance between the first landmark and the second landmark satisfying the size threshold.
2. The method of claim 1 , further comprising:
determining, based on the real distance between the first landmark and the second landmark, a location on the gun for a sensor.
3. The method of claim 2 , further comprising:
determining a handedness of a customer based on the image depicting the hand, wherein the location on the gun for the sensor is further based on the handedness of the customer.
4. The method of claim 2 , further comprising:
manufacturing the gun with the sensor in the determined location, wherein the gun comprises a firearm.
5. The method of claim 1 , further comprising:
determining a size of a sensor based on the real distance between the first landmark and the second landmark; and
manufacturing the gun with the sensor of the determined size.
6. The method of claim 1 , further comprising:
receiving user-input indicating a number of users permitted to operate the gun, wherein the determining the backstrap size is further based on the user-input.
7. The method of claim 1 , further comprising:
identifying a third landmark of the hand representing a tip of an additional digit, wherein the additional digit comprises a second digit or a fourth digit;
calculating, based on the first landmark representing a tip of a third digit and the third landmark representing the tip of the additional digit, a difference in length of the third digit and the additional digit; and
determining that the difference in length of the third digit and the additional digit satisfies a finger difference threshold, wherein the backstrap size is further based on the difference in length satisfying the finger difference threshold.
8. The method of claim 7 , wherein a probability of a randomly selected hand satisfying the finger difference threshold is less than 25 percent.
9. The method of claim 1 , further comprising:
storing an indication of the backstrap size in a database system, wherein the gun is assembled with a backstrap component of the determined backstrap size based on the indication of the backstrap size.
10. The method of claim 1 , further comprising:
obtaining a second image depicting a second hand and a second fiducial marker indicating a second scale;
calculating, based on the second fiducial marker indicating the second scale, a second real distance between a first landmark of the second hand and a second landmark of the second hand; and
determining that the second real distance between the first landmark of the second hand and the second landmark of the second hand satisfies a second size threshold, wherein the determining the backstrap size for the gun is further based on the second real distance between the first landmark of the second hand and the second landmark of the second hand satisfying the second size threshold.
11. The method of claim 1 , wherein the first landmark represents a tip of a third digit and wherein the second landmark represents a base of the hand.
12. The method of claim 1 , wherein the hand depicted in the image comprises a three-dimensional hand or a two-dimensional hand profile.
13. The method of claim 1 , wherein the fiducial marker comprises a grid of known dimensions or an icon of known dimensions.
14. The method of claim 1 , wherein the real distance between the first landmark and the second landmark represents a size of the hand.
15. The method of claim 1 , further comprising:
calculating an in-image distance between the first landmark and the second landmark; and
converting the in-image distance to the real distance based on the scale indicated by the fiducial marker.