Manipulate Bitmap in DSP Code

[kortezzzz]

Thanks for the fix, martin. Really great little module.

A question:

I mentioned that as the size of the loaded image increases, the loading times for new loaded image (after pressing the "do" trigger) increase as well. Considering the size of the generated arrays, its quite expected, but a 300X300 png that being loaded after 5 minutes?... that's lot of time. Is there any trick to decrease those loading times? As I'v understood from trog's explanation a while a go, Ruby won't do the trick as she's much slower then green with generating arrays.

[martinvicanek]

Thanks for the feedback, kortezzzz. I did some trigger engineering and got the following benchmarks for a 512x512 pixel image;

loading time: 3s
processing time: 1s

That's not great but certainly better than 5 min. Perhaps an external DLL would help, but then it is sort of pointless to use FS in the first place, no?

[RJHollins]

mmm .... getting a Ruby ERROR in the 'Trigger Rate Limiter' module. Undefined method: scheduleMethod

[tulamide]

If you want to access examples that are made with Ruby, you should update to 3.0.6
That's because there were significant improvements to the Ruby implementation. From 3.0.6 to 3.0.8 they were of cosmetic character only, so 3.0.6 will give you access to all Ruby codes, that were posted here up until 3.0.9 is published (I'm already frightened of that day. No easy exchange of schematics anymore )

[tulamide]

As I'v understood from trog's explanation a while a go, Ruby won't do the trick as she's much slower then green with generating arrays.

Might be a misunderstanding, because the opposite is true.

http://prntscr.com/b8wt2y
The green floats output the time needed to create the arrays in seconds

[aronb]

Martin,

That is amazing !!!

My stuff is simple (I think ) in comparison to your work - I don't even know how you think up stuff like that in Flowstone, but I'm learning thanks to the great teachers here on the forum !

I am trying to load a bitmap, then with X and Y inputs access the pixel at that point, just like the "GetPix" primitive BUT AS FAST AS POSSIBLE.

For one project I need only about 128 x 128 pixel resolution, so at 44100 that allows me to traverse the full array (if needed) in about (128 x 128) / 44100 or 0.4 seconds. But I really only need to access about 2048 pixels per array traverse (random lookup) so that is even faster at about 2048 / 44100 or 0.05 sec (20Hz). Eventually I will get a low resolution video image and look only at certain areas (pixel locations) but I have to do it fast - again "GetPix" is too slow unfortunately

You could even use this to scan a BMP Image out to an RGB LED XY Pixel Array, maybe even with slow video at low resolution - that would be cool to. But that is yet another project...

(For another project I need to access larger resolutions say up to 4096 x 4096, but that is for a different time, much later)

Just a Fast Version of GetPix is Needed

QikPix.JPG (17.89 KiB) Viewed 24920 times

Think of it like Blue (Stream) inputs and outputs instead of Green (GUI Speed) inputs and outputs

I don't need color (C) out even, just RGB & Alpha, or even just RGB, or maybe HSB.

Hope that is a bit clearer, and thank you for the great discussion !

Aron

[kortezzzz]

Thanks for the feedback, kortezzzz. I did some trigger engineering and got the following benchmarks for a 512x512 pixel image;

loading time: 3s
processing time: 1s

Really great, matrin. That's faster then enough . I'm trying to do an interesting experiment which saves the image into a wav. file, and to do it right, I've used the "append" primitive to add the whole 4 arrays + image size info into 1 monstrous array that would contain all the data needed for extraction and finally, connected it to the "float to mem" prim' that is connected to the "save vav" primitive. By that, I've saved saved the image into the wave. file and was able to re-load by extracting the data from the file (very painful process... ). It works. But unfortunately, the "trigger blocker" trick doesn't works when appending arrays for some reason.

Might be a misunderstanding, because the opposite is true

@ tulamide, that's very interesting. Would love to see the ruby looper in action in martin's example!
If you find the time to show us how, where, why with a little schematic, that would be wonderful.

By the way, If speaking about ruby arrays: there are 2 things I've needed to do with ruby and I have no idea where to start. I'm sure that would decrease the whole process duration dramatically considering tulamide's statement.

1) How to append arrays in ruby in to one?
2) How to split any kind of array with ruby on a given index (we have only one split prim' in FS which splits only string arrays...)?

Great post, people. Thanks!

[tulamide]

1) How to append arrays in ruby in to one?
2) How to split any kind of array with ruby on a given index (we have only one split prim' in FS which splits only string arrays...)?

(1)

Code: Select all

array1 = array1 + array2

or alternatively

Code: Select all

array1 = array1.concat(array2)

(2)

Code: Select all

array2 = array1.pop(number_of_elements)

Say, array one has 20 elements, then after
array2 = array1.pop(10)
the first array will contain the first 10 elements and array2 the last 10 elements. There are other ways as well.

[kortezzzz]

Thanks a lot, tulamide. I'll try this

edit:

Is there any difference between string arrays, int arrays and float arrays when spliting\appending or it works with any of them?

[martinvicanek]

I am trying to load a bitmap, then with X and Y inputs access the pixel at that point, just like the "GetPix" primitive BUT AS FAST AS POSSIBLE.
[...]
Think of it like Blue (Stream) inputs and outputs instead of Green (GUI Speed) inputs and outputs

Like this?

StreamGetPixel.fsm

(170.65 KiB) Downloaded 993 times

@tulamide: very interesting comparison and for me a surprising result! But how do you keep the loop inside Ruby for the task at hand? You would need Ruby commands for getPixel and color2RGBA. Not sure if those are available in FS Ruby?