is there a waitkey table?

waitkey

asked 2016-08-21 12:24:24 -0600

j0h
106 ●4 ●7 ●13

I'd like to give waitkey commands for any given letter. Imagined there would be a table with (letter == N ) on the waitkey API, but I did not see it. what are the numbers for a,s,d,w respectively? Or is there something that says what each key is someplace?

not sure what I mean? Heres the keypress codes for SDL. https://wiki.libsdl.org/SDL_Keycode Im looking for something like that, buy for the OpenCV waitkey codes

Im looking for C++, but python would be good too, if they are not the same.

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I'm not sure to understand.

char c;
c=waitKey();
if (c='N')
....

It's only ASCII code. For key function I think value return is always 0 if use char type with int you have a key code may be platform sensitive.. F1 7340032 for windows10 left arrow 2424832

LBerger ( 2016-08-22 02:57:59 -0600 )edit

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answered 2016-08-21 18:54:05 -0600

Tetragramm

7376 ●13 ●37

updated 2016-08-21 18:54:33 -0600

There is. http://www.asciitable.com/

Use the DEC column.

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Nice, I was off by 32, but i got it now.

j0h ( 2016-08-22 09:25:22 -0600 )edit

If it is off by 32 than that means you did not do waitKey() & 0xFF which is mandatory to get the correct output on every system ;) luckely there is a PR awaiting merging trying to solve this issue through a waitChar() function!