How to apply random "random seed" value to multiple images

Question

So, I am in a weird situation, have been surfing the net for the solution for over a day now and can't really find the solution.

What is it?

Its a small school project which I have chosen and cant really find a way to do it.

What I want to achieve?

I have an image and I want to have like 50 variations of it.

What I did?

I loaded up an image, recorded an action which applies the filter called "Wave", the the wave dialog box I selectedMinimum and Maximum range for values.

Problem I am having:

I made 50 copies of the same image, and then I applied the action via batch processing to these 50 images. However, it applies the exact same settings/values which I recorded. It doesnt really use the range i.e maximum and minimum values I selected in the wave dialog box. It looks like when I closed hte wave dialog box, the action creates a new value called "Random seed" when recording and perhaps this random seed number tells photoshop what to choose from the min and max range supplied by the user.

So is there any way so that when I run the action, it will pick up a new random value from the supplied min and max range?

Thanks

Marolina

Michael_L_Hale · Accepted Answer

Hi guys, sorry for the late reply, I got the extension, now I have to submit it on Monday.

I am using the following range for Wave filter:

Number of generator: 1

Wavelenght: 93 to 198

Amplitude: 5 to 35

Scale 100% 100%

Type: Sine

Undefined area: Repeat edge

I downloaded the script listener plugin (I am using trial version of CS6), took a quick look over the pdf file, but it looks a lot, I was thinking of it as some type of maro recorder, but first I would need to learn the hmm syntax?

I am in Btech, and we were given the choice to make a project on any topic, and I selected the topic in which I want to prove that if we take a screenshot of the text, and run it through a s/w like photoshop, we can make 100s of different variations like twists etc (just like recaptcha does), to make it harder for the ocr programme to read it.

Basically, I want to show that OCR will become obsolute if we twist (apply other effects too) the text enough, but still it would be readable by the humans.

Save the script below in plain text with the .jsx extension. Replace the wave filter step in your action with a step that runs the script. The rest of the action can remain the same.

// seed range detemined by running the filter with the desired settings 10 times
// and getting the lower and upper range from the scriptlistener log
// the seed seems to depend on the other values. In another test the seed was
// a 8 digit number
var seed = Math.floor((192000-186000)*Math.random()) + 186001;
app.activeDocument.activeLayer.applyWave(1,93,198,5,35,100,100,WaveType.SINE,UndefinedAreas.REPEATEDGEPIXELS,seed);

Michael_L_Hale · Answer

I think it is more likely that Random seed is used to determine where along the waveform to start. The waveform itself is defined by the other values in the dialog.

Unless you want to toggle the display for the wave step in the actions panel and click ok 50 times during the batch to generate a new Random seed you will need to replace the wave step in the action with a step that runs a script to apply the wave filter.

If you post the setting you used in the wave filter dialog( or a screenshot of the dialog with your settings ) I will try to create the script for you.

If you want to create the script yourself you can install the scriptlistener plug-in if it is not installed and run the wave filter several time to get an idea of the seed range. For example when I tried this using my setting the seed was a 8 digit number that started with 1763. You can use Math.random and Math.round to generate the other four digits.

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