Look at

(1 10$0) E. image

or

(10 $ 0) E. line

Beware of a previously-reported bug in non-literal E.

Henry Rich

On 2/19/2014 7:04 AM, Joe Bogner wrote:
I can get it aligned, but I'd like to flag the start of the line and not
just when I first detect a line.

For example, I'm saying a line is when 10 consecutive pixels are 0. This
flags the 10th pixel. When I reshape and align, I'm losing the line starts.
I apologize for the poor wording of this. Perhaps a picture and small test
case will help:

http://imgur.com/tvQn6ZD

]lines=: 2 22 $ (0 0), (10 $ 1), (10 $ 0),(5 $ 1), (10 $ 0), (4 $ 1), (6 $
0)
]hlines=:(5 (+/)\"1 lines) = 5
]hlines2=:2 22 {. hlines


(note: the 2nd row only has 1 line since the 2nd block only has 4
consecutive pixels = 1)

    lines
0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0
    hlines
0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
    hlines2
0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

I would like hlines2 to be:

    hlines2
0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

So in this case, I find the 1s and make the next 4 pixels 1. I'm not sure
how to go about that or if this is the right way to solve the problem.

I might be able to trigger the start with Outfixes... <\."1 lines, but that
seems inefficient and only gets me partly there. I only considered a state
machine but that also seems heavy. Thanks for any input



On Tue, Feb 18, 2014 at 9:42 PM, Joe Bogner <[email protected]> wrote:

Raul, thanks! Yes, that solved the mismatched shape problem. Now I just
need to tinker with getting it aligned.

On Tue, Feb 18, 2014 at 9:20 PM, Raul Miller <[email protected]>wrote:

It looks like you are losing 9 pixels from each array.

The easy answer would be to put them back. Ideally, you would try to put
some back on each side so that the result is not too far off center.

Thus:
    hlines2=: 58 157 {. 58 _152  {. hlines
    vlines2=: 58 157 {. _43 157 {. vlines

Note that your matched content will be smaller than the original. That's
also fixable if it's an issue for you.



----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm

----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm

Reply via email to