Legacy ImageMagick Discussions Archive

ok... I got it.

It is working, man! I am pretty much there... I will share what I got here later...

Ok! thank you for your patience!

Actually I also want the *.png output.

Ok...

I will check that.

Now I am facing another issue:

When I do the following in PHP, $compara is null:


$compara=shell_exec("compare -fuzz 5% -metric AE /home/".$key."/".$dir[$key]."/".$average." ".$imagem_atual." s_".$key."_".date("Y_m_d-H_i_s").".png");


How could I get the average ...

You are right. I understand perfectly that.

However, JPG is the way these D-Link cameras save their images. So I need to find some way to deal with the information I have within the jpg format.

Right now I am using the -fuzz filter. I wonder if there could be something better?

Moreover, now I ...

A quick test I just did:

If I add -fuzz 8% to compare, as follows:


compare -fuzz 5% -metric AE r1.png r2.png s1.png


the result is that I get "zero" as a numerical indication of how close the images are (the images are almost identical). But this seems a bit artificial for me... Isn't there a ...

Note that you previously suggested to substitute "compare" by "convert -compose difference"


convert r1.png r2.png -compose difference -composite s1.png


But in this case, I am not able to use -metric AE, which is important for me.

If I include -metric to the convert command, it doesn't show ...

I am still facing issues related to the "lossy" characteristic of "jpg" images.

I had two original jpg files: r1.jpg and r2.jpg.

I converted those to png using the following command:


convert r1.jpg r1.png
convert r2.jpg r2.png


This is the r1.png file I got:

[img]
http://i1039.photobucket ...

Not very easy to find documentation on -evaluate-sequence.

I tried -list evaluate, but it gives only a list of reserved words, with no explanation.

Ok...

I will not use -average.

Regarding the jpg/png issue, my camera generates jpg. Converting jpg to png would be enough? Is IM capable of doing this conversion?

Funny...

I am testing IM with regard to averaging images.

I did the following:

convert origin.jpg -verbose -average media.jpg
compare -metric AE media.jpg origin.jpg teste.jpg


I got a very large number as a result for the comparison: 41965

It makes no sense, right? The file teste.jpg also ...

In order to test that I need to discover how to trigger a ftp upload from the camera using PHP.

If I set the camera to upload periodicaly, my WIFI will be jammed. I need to combine motion triggered upload with a few periodical uploads, triggered by my server.

D-Link cameras have no documentation ...

I am considering to use something like:

I finally tried the technique you proposed, that is, using connected components to separate the different features.

It works, but there is something I forgot to tell you: I have a streaming of images. The camera is already set for detecting movement, and it keeps sending images to the server for ...

I was reading the nice tutorial of Fred Weinhaus on Fourier Transforms:

www.imagemagick.org/Usage/fourier/#fourier_transform

It is very clear, but I didn't catch was what is the difference between +ift/+fft and -fft/-ift.

Thanks!

I used the following way:

viewtopic.php?t=24284