normalization - Manipulating Gyroscope / Accelerometer Values obtained from iPhone 4 -

-

I am developing a project for my university, which manipulate gyroscope / accelerometer values ​​from iPhone 4 . But I got stuck with a math problem and I hope you guys can help me.

What example do I give you about this:

  1. Your iPhone is of face and you
  2. The face of your iPhone is correct and you At the bar X axis, this time the axis (when you have rotated the iPhone 90 degrees). For the second time, the computer has said that I have transferred the iPhone to the right, but it is wrong. I have taken it up, but my eyes were rotated because the face of the iPhone was right.

    What do I want? I need to virtually withdraw the iPhone face (where 3 axis is correct) and each axis gives the right movement.

    If the iPhone has been 90 degrees, I can easily switch the XJ axis and its right but I want to work it for any angle of rotation.

    If someone can help me with some kind of pseudo-algorithm or mathematical description, then I would be truly grateful.

    Note: I just need to replenish all the three axes along with the iPhone rotation.

    Update:

    I do not need exact values, because I am making a graph contrast between all the records obtained from the ziroscope. I will make it clear.

    - & gt; You just take a letter by taking the iPhone into the air and my application will recognize the letter you attract. The method I use is based on the TFT algorithm, and records a database with sample values ​​that I have already attracted.

    I have to say: or what they represent. All I need is that all the graphs are equal, even if the iPhone is on a different position. It is very difficult to clarify, but if you make 'P' in UP with the iPhone, the graph will be different if you come to 'P', then the iPhone took the right steps.

    So I need to replenish the axis for my original orientation, in this way I'll always get the same graph.

    This post was before IOS5 was released. For any person coming here, FYI shows the way to change the relative acceleration values ​​to the earth for iOS 5 and above.

Comments

Post a Comment

Popular posts from this blog

qt - switch/case statement in C++ with a QString type -

-
I want to use switch-case in my program but the compiler generates an error. How can I use the switch statement with QString ? The compiler gives me this error: The expression of the switch type 'QString' is invalid My code is as follows : boolStopWord (the word QString) {bool flag = false; Switch (word) {case "the": flag = true; break ; "On" case: flag = true; break ; Case "in": flag = true; break ; Case "your": flag = true; break ; Case "near": flag = true; break ; Case "all": flag = true; break ; Case "this": flag = true; break ; } Return flag; } How do I use the switch statement with a Caststring ? You can not use the switch statement in C ++ language with integral or enum types. You can formally enter the square type of object in the switch statement, but this means that the compiler will look for a user-defined conversion to convert it to an integral or enum type.
Read more

python - sqlite3.OperationalError: near "REFERENCES": syntax error - foreign key creating -

-
I'm trying to create a predefined key after checking the manual and I wrote it: Db.execute ("create table" Table 2 (id, integer primary key, somedata integer) "db.execute" (table creation table 2 does not exist (name text, maintain reference (id) ") and found this: sqlite 3. Operation error: near" references ": syntax error Your second ligne is wrong db.execute ("create table if table does not exist 2 (name text, my_id integer, foreign key (my_id) reference Maintenance (ID)) ") as explained
Read more

Python's equivalent for Ruby's define_method? -

-
What is a Python equivalent for Ruby's define_method , which is the dynamic generation of class methods will allow? (As can be seen in Wikipedia) Functions are first-class objects in Python and assign them The properties of a class or an example can be a way of doing the same thing as a Wikipedia example: colors = {"black": "000", "red": "F00", "green": "0f0", "yellow": "ff0", "blue": "00f", "magenta": "fff", "cyan": "0ff", "white": " FFF "} Class MyStream (ARR): Pass for Name, Code in colors.iteritems (): def _in_colour ( W code = code): return '& lt; Span style = "color:% s" & gt;% s & lt; / Span & gt; ' % (Code, self) setter (histrive, "in_" + name, _in_ color)
Read more