I have a photoshop script that is cutting up layers of a PSD file into tiles (it's for a parallax game engine). This works well, but now I want to be able to create regions (rectangles) in the PSD that can be detected by the script and exported as json data.
Can anyone suggest a good way in Photoshop to a) visually create this information in the PSD and b) the script that would write out this data?
Any help would be greatly appreciated - this would remove about 3 manual, error prone steps from our current process if we can solve it...
If it's just rectangles that will hold the data for you then that's easy. You can just create a layer with a unique name, select the area that you need the data for, fill that with a single colour - say bright orange or something that will stand out. So now you have a layer with your region data. In your script get the layer by name
app.documents.getByName("Data_for_Region_1");
...and then you can then export that layer's data (co-ordinates - presumably) as a JSON file with layer bounds.
var x = parseFloat(app.activeDocument;.activeLayer.bounds[0])
var y = parseFloat(app.activeDocument;.activeLayer.bounds[1])
var x1 = parseFloat(app.activeDocument;.activeLayer.bounds[2])
var y1 = parseFloat(app.activeDocument;.activeLayer.bounds[3])
Hope this helps
Related
I'm using python to build an application by PyQt5, the main idea is to display images from a directory and for each image some masks show up next to it to select one of them (i.e. for each image there are different number of masks). So, I want to display these masks in a "container" that can handle this dynamically.
I tried QlistWidget in a scroll area and the masks are displayed as icons in it, but I want to use something else to handle them easier and retrieve any mask as Qpixmap or QImage to use it in another operations without convert it multiple times (which slows down the program)
this is the part that displays the masks (this is the only way that worked with me)
for ann in annotations:
mask = self.coco.annToMask(ann)
mask_img = Image.fromarray((mask*255).astype(np.uint8))
qt_img = ImageQt.ImageQt(mask_img) # convert Image to ImageQt
icon = QtGui.QIcon(QtGui.QPixmap.fromImage(qt_img))
item = QtWidgets.QListWidgetItem(icon, f"{annIndex}")
self.listWidget.addItem(item)
annIndex += 1
I am trying to write a pine script with two indicators one overlaid on the chart (EMA) and another on its own?(Stoch) I cannot seem to find any info on how to separate these (Visually) but keep them within 1 pine script, ie to be able to take trading decisions based on these.
The earlier answer from Luc is right, unfortunately. Each script can either create plots that are overlaid on the default price chart, or shown in a different pane, but not both. But there is a workaround.
Suppose you've made some non-trivial calculation in your script and you'd like to put it in different pane. E.g. the next code:
//#version=4
study(title="Stochastic", shorttitle="Stoch", format=format.price, precision=2)
periodK = input(14, title="K", minval=1)
periodD = input(3, title="D", minval=1)
smoothK = input(3, title="Smooth", minval=1)
k = sma(stoch(close, high, low, periodK), smoothK)
d = sma(k, periodD)
plot(k, title="%K", color=color.blue)
plot(d, title="%D", color=color.orange)
h0 = hline(80)
h1 = hline(20)
fill(h0, h1, color=color.purple, transp=75)
// This next plot would work best in a separate pane
someNonTrivialCalculatedSeries = close
plot(ema(someNonTrivialCalculatedSeries, 25), title="Exporting Plot")
Because they have different scale, one of them most likely will break another indicator's scale.
So you'd like show Stoch in different pine, whereas ema() should be overlayed with the main chart. For that you should make the next steps:
Turn off in the study's the extra plot to return scale to normal:
Apply to the chart the next script:
//#version=4
study("NonOverlayIndicator", overlay=true)
src = input(defval=close, type=input.source)
plot(src)
Choose in the second's script inputs source required plot from the first script:
And voilà - you got the plots in different pines:
But if you want split the plots because you have retrictions on amount of studies you allowed to apply (e.g. 3 for free-account) - that won't help you.
It cannot be done. A script runs either in overlay=true mode on the chart, in which case it cannot direct plots elsewhere, or in a separate pane when overlay=false (the default).
When the script is running in a pane, it can change the color of the chart bars using barcolor(), but that's the only way it can modify the chart.
It is possible to rescale signals so that multiple bounded (e.g., 0-100, -1 to +1) signals generated by one script appear one on top of the other, but this is typically impossible in overlay mode, as the vertical scale varies with the bars on the chart. The only way for an overlay script to work with its own scale is when it uses No scale, but this prevents the indicator's plots to plot relative to price, and so the chart's bars.
Nice workaround from Michael.
Unfortunately, this only seems to work to pass data for one plot.
I would like to pass data for 3 different plots to the stock price graph.
If I try this, for 'input.source' I can only select the standard sources: "open, high, low, close ...". I can not select the data from other indicators.
If I remove plots 2 and 3, it works as Michael described.
Anybody has a workaround for the workaround..? ;-)
How can I change in Photoshop CC a greyscaled jpg or pdf to just black and white (no grey and no color)?
I googled around but found nothing in that direction!
THANK YOU!!!
There are multiple ways you can achieve this:
Method 1 - Two color PNG
Open your grayscale image in Photoshop
Go File > Save for Web
Set the file type as PNG-8, Colors: 2
Then you can play with No Dither, Diffusion, Pattern, Noise to achieve different effects
Save...
Method 2 - Use a filter
(I'm using CS6)
Open grayscale image in Photoshop
Go Filter > Filter Gallery > Artistic > Sketch > Stamp
Method 3 - Threshold
(as supplied by Mark Setchell)
Image->Adjustments->Threshold
Alternate Illustrator Method
Open grayscale image in Illustrator
Select the image on the stage, then go Object > Image trace > Make
In the toolbar, there will be an Image Trace Panel button/icon, if you click this you will have options you can play with (Threshold)
one more method:
GO image> adjustment> levels.
In input level collide the three sliders together.
you get different pattern depending on the position of the three sliders.
I have this interactive chart here. As its data change depending on selected time period I wish to set the date range from Nov-10 to Jul-14, no matter the data. I know that I must use overrideMax on x axis, but I can't make it to work. I guess it's a matter of date formatting. Every single combination I've tried gives the following as result.
What is the right formatting? Thanks a lot.
EDIT: Thank you very much on your quick response, John. Now it is working. I'm loving Dimple more and more!
I have another question regarding this chart. Is there any way to arrange drawing order of series? I would like 'Previsión' to be sent to back. Now it is drawn depending on time period.
EDIT 2: Based on this other question I think I figured out a solution. With a 50ms delay after the chart is drawn I simple erase the circles and paths I wish to be at the front and then append them to the chart svg object.
setTimeout(function () {
var datoCircles = svg.selectAll('circle[id*=Dato]:not([id*=futuro])');
var prevCircles = svg.selectAll('circle[id*=Prev]');
var prevPaths = svg.selectAll('path[class*=Prev]');
datoCircles.remove();
prevCircles.remove();
prevPaths.remove();
// Convertimos la seleción d3 a objetos jQuery
$(svg.selectAll('svg > g')[0])
.append($(prevPaths[0]))
.append($(prevCircles[0]))
.append($(datoCircles[0]));
}, 50);
They need to be set with JavaScript date objects, as native date parsing in JavaScript causes cross browser problems, I recommend using the d3 method:
x.overrideMax = d3.time.format("%Y-%m-%d").parse("2014-05-09");
With this approach you can use whichever date format suits you.
I am having issues re-writing one of the default logo scripts in GIMP(using Script-fu based on scheme). For one thing the alpha layer is not shown in the layer browser after the image is shown. I am re-writing the Create Neon Logo script(neon-logo.scm) and I want it to do the following before it displays the new image:
add an alpha channel
change black(background color) to transparent via colortoalpha
return the generated image as an object to be used in another python script(using for loops to generate 49 images)
I have tried modifying the following code to the default script:
(gimp-image-undo-disable img)
(apply-neon-logo-effect img tube-layer size bg-color glow-color shadow) *Generates neon logo
(set! end-layer (car (gimp-image-flatten img))) *Flattens image
(gimp-layer-add-alpha end-layer) *Adds alpha layer as last layer in img(img=the image)
(plug-in-colortoalpha img 0 (255 255 255)) *Uses color to alpha-NOT WORKING
(gimp-image-undo-enable img) *Enables undo
(gimp-display-new img) *Displays new image
For number 3 my python code is this:
for str1 in list1:
for color1 in list3:
img = pdb.script_fu_neon_logo(str1,50,"Swis721 BdOul BT",(0,0,0),color1,0)
But img is a "Nonetype" object. I would like to make it so that instead of displaying the generated image in a new window, it just returns the generated image for use with my python script.
Can anyone help?
Maybe to keep everything more managaeable and readable, you should translate theoriginal script into Python - that way you willhaveno surprises on otherwiser trivial things as variable assignment, picking elements from sequences and so on.
1 and 2) your calls are apparantly correct to flaten an "add an alpha channel " (not "alpha layer",a s you write, please) to the image - but you are calling color-to-alpha to make White (255 255 255) transparemt not black. Trey changing that to (0 0 0) - if it does not work, make]
each of the calls individually, either on script-fu console or on python console, and check what is wrong.
3) Script-fu can't return values to the caller (as can be seen by not having a "return value type" parameter to the register call. That means that scripts in scheme in GIMP can only render thigns on themselves and not be used to compose more complex chains.
That leaves you with 2 options: port the original script to Python-fu (and them just register it to return a PF-IMAGE) - or hack around the call like this, in Python:
create a set with all images opened, call your script-fu, check which of your images currently open is not on the set of images previously opened - that will be your new image:
The tricky part with this is that: there is no unique identifier to an image when you see it from Python-fu - so you 'dhave to compose a value like (name, number_of_layers, size) to go on those comparison sets and even that might not suffice - or youg could juggle with "parasites" (arbitrary data that can be attached to an image). As you can see, having the original script-fu rewriten in Python, since all the work is done by PDB calls, and these translate 1:1, is preferable.