How to use the Android camera measurement ruler (advanced Ruler Pro)

Http://www.cnblogs.com/sinojelly/archive/2010/08/13/1799341.html

Advanced Ruler Pro is an Android mobile app that can measure the length of objects that are much larger than the size of a mobile phone. It supports three measurement methods, distance, height, length, the first two are very easy to use, the length of the measurement is more difficult to use some. The Distance ruler uses the distance ruler to measure the length of the room: (1) measure the height of the eyes from the ground (usually height *92%) (2) Click Camera Height to set the camera height. (When measuring, the body stands upright, the camera is placed in front of the right eye, easy to Aim) (3) tilt the camera, so that the sights are aligned to the measured position, click on the sighting device, distance display is measured position distance from the standing position of the horizontal distance. The same method is used to measure the width of the room: two, height ruler measure the length of the room with a high ruler: (1) Click Camera Height to set the camera altitude. (When measuring, the body stands upright, the camera is placed in front of the right eye, easy to aim, and the same as before) (2) tilt the camera downward, so that the target is aligned to the bottom of the object being measured, click on the sighting device. (3) Tilt the camera upward so that the sight is aligned to the top of the object being measured and click on the sighting device. Third, the length of ruler is more complex, first to understand the screen elements: note: Click on either end of the measurement ruler, turn red, then it can be dragged. The measurement steps are as follows: 1, select a reference (for example: I choose a business card, length 9cm), put it to the object to be measured, it and the measured object to the camera distance consistent. (Note: If the distance is known, or measured with distance first, you can measure the length of the object by distance, it can be used without reference) 2, away from the object being measured, so that the object is integrated into the camera lens. 3. Use the measuring ruler (measuring tape) in the lens to measure the reference. (if the object being measured is vertical, then keep the horizontal ball in the center to improve accuracy) 4, sliding length slider (length sliders), so that the length of the following reading is 9cm, the right distance reading is the distance of the measured object distance from the camera. 5. Measure the length of the measurement with the measuring ruler in the lens, and the reading of length is the measured one. (distance will not change during the measurement) (1) Measure the screen length of the notebook computer. (35.77cm) (2) Measure the screen width of the notebook computer. (20.85cm) (3) measure the screen diagonal length of the notebook computer. (40.34cm)

How to use the Android camera measurement ruler (advanced Ruler Pro)