I do not know the real name of this type of "QR" they are used in augmented reality and other tracking applications.
Here is a image of what it looks like.
I want to build a vb.net program that finds as many of this in a image. I do not need to get angels and so. Only a number.
The marker need to handler +10K of numbers and tolerate rotation.
I did use https://github.com/jcmellado/js-aruco as a template to solve my problem.
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The problem occurs, when I baked lightings & reflections via Principled-BSDF (Cycles) on an "Image Texture"-Node repeatedly. The first times I get excpected solutions and then suddenly the mesh seams to be broken as it keeps showing future bakings incorrectly (image below).
Also when I move an island in the UV-Map nothing seams to changes on the Mesh in the 3D-Viewport. The UV-Texture looks unchanged no matter what I do. Like it has frozen or something.
My Blender Version is: 2.92. Im getting the same problem with 2.83.
I keep getting this problem over and over and I just can't find a solution. Even if I exported the mesh in another project. It just "infects" the other project and I get the same problem there.
I only can repair it if I completely start over.
Please help me. I'm really frustrated with this. This has defeated my blender project now for like the 4th time... :/
> Screenshot example here <
It appears as if the generated texture coordinates are being used for some reason instead of the UVMap coordinates. If the vector socket of the of the image texture node is unconnected it should use the current selected UVMap.
This may actually be a bug if it's happening after multiple uses of the baking tool.
You should first try connecting the image vector input to the uv output of a texture coordinate node to see if it has any effect. Alternatively try to connect a UVMap node
I have a set of pixel perfect icons which I want to use on toolbar (NSToolbar) of my app. Toolbar is configurable thus I need to provide icons in four sizes: small, standard, small#2x, standard#2x.
I could not find any official information about the size of those icons, but unofficial information (confirmed by my tests) is the following:
small is 24px, normal is 32px.
Thus I need to add four different images: 24x24px, 32x32px, 48x48px, 64x64px to my image set.
As for now I could not find a correct way for that.
I have tried a dozen of different methods but could not find one which preserves pixel perfect quality of all four images.
I believe, I can load right size of the image manually each time it has to be changed, but I am wondering if where is a correct way for that.
Does anyone has a good solution for that?
And yes, I clean build folder before each test.
See the Apple Developer site Human Interface guidelines for formats and sizes. The requirements are different for the different devices, and quite detailed.
For a quick & dirty solution if you're not ready to ship and just want nice looking graphics for testing, I've found that one 512 x 512 pdf, labeled "image#2x" works pretty well. You need to set the
imageScaling = .scaleProportionallyDown
and Cocoa will take care of the rest. But it's definitely not ready for prime-time.
The NSToolbar.sizeModes are enum: small and regular. Small is 24x24 and regular is 32x32; additionally the retina options allow for #2x (48x48 and 64x64) and potentially #3x future-forward.
Apple documentation on these sizes can be found here and here
Make sure to use enum Regular not "Standard", which is undocumented.
There are several examples in the API, but for some reason, what I think the biggest feature is eluding me for some reason. I have a list of points and each point needs to be represented by a different icon. I also may have layers that use the same icon which I can find, just not the option for different icons/markers. An example of this would be greatly appreciated!!
I found out how to use the Graphic option to add an array of points that have a different url for their markers (symbols). This used the Picture Marker type. The beauty of JSON!!
Recently I am trying to attach an event listener to a live display so as to acquire a series of images automatically and the even map used is "data_value_changed". In TEM mode everything is fine and the 3D stack can be properly obtained. Unfortunately, while applying this to a live STEM image from the DigiScan, the script failed completely. Later on I just realized that in such a mode, the image is updated pixel by pixel with the scanning rather than frame by frame. Another event map "data_changed" was further tested but still ended up with failure.
With DM2.0 or later version, it seems to be much easier to acquire a series of customerized STEM images, since the DigiScan controlling can be conveniently accessable via scripting. Unfortunately, our microscope is quite old and only with DM 1.5 installed.
Is there any event map sepcific to this purpose or the approach of event handler is not suitable at all?
Thanks in advance
The data changed event handler is suitable, but there is no event for a particular frame/complete event.
Instead, your event-handling code needs to be creative and deal with the situation that you get more events than you want. You are really only interested in the event which (also) change the last pixel in an image (as the frame is sequentially filled), but you do get events whenever sub-parts of the image change.
So you need to "filter" those events out - as quickly and CPU-conservative as possible.
The easiest way is to gather the last pixel's value at each event and compare it to a stored value. If the value changed, then this pixel was changed, indicating the frame is "complete" and you want to use the event. Otherwise, just return without further action.
There is a very slim chance ( - for scanned images - ) that a "new" frame has the numerically identical value than the frame before, so this in most cases is all yoou need to do.
If this isn't enough for you, you may look at longer - but also more CPU cycles consuming - checks like each time computing a Boolean change map betwee "now" and "buffered" and keeping track of the "last" change. Then, if there is a "jump over" to an earlier index, you know that your "buffered" last image actually wa a full frame.
(Note, that you will always see the data update once at the end of frame. Hence this will work.)
There is an example of this type of script in this answer here. If this isn't working for you, please comment or rephrase your question for more details on where you run into issues.
Been playing with StudioJS wrapper for ImageResizer. Can ImageResizer adjust the white balance relative to a color? Ultimately, I want the user to be able to click an area in the image that should be white, and the rest of the image adjusts.
I see the Auto Balance functionality that uses the AdvancedFilters plugin, I guess I want to take it a step further.
No, ImageResizer doesn't current support adjusting relative to a color. However, if you wanted to implement said feature, it would not be difficult.
You could modify AdvancedFilters.cs, inserting an IF statement near line 150, and add support for a new command, such as "&a.white=rrggbb".
Simply provide the RGB values to the LinearLevels class to perform the scaling on the image.
http://www.aforgenet.com/framework/docs/html/29bf1191-47c9-314b-eb8d-bea3f903ac28.htm
If you like the result, and want to share it, send me a pull request on GitHub or e-mail me the code snippet. If it passes testing, it might make it into the next release.
Client side, you might find this library helpful for selecting a color from an image.