I have Dell XPS 15, I installed LibreOffice only to come across gradient rendering issue. I created a rectangle, filled it with gradient and sent it behind text. I closed and opened document and I have issue of gradient filling partially not rendering:
This happens only for gradients. Is there any setting I could tweak to prevent it?
P.S. I just tried rotating gradient and it breaks depending on angle:
I found a solution for rendering issue of gradients on LibreOffice.
Go to Tools -> Options -> View and untick 'Use Skia for all rendering'
After this there were no more issues with displaying gradients:
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Presently I'm learning the basics of real-time raytracing with the DXR API in DirectX 12 Ultimate. I'm studying the D3D12 raytracing samples on the official GitHub and am using an i9/Intel Iris Xe/RTX3070 laptop and building the programs in VS2022.
Since the samples were written for Windows 10 and I'm using a hybrid graphics PC, a Debug build will run in Windows 11 after adding D3D12_MESSAGE_ID_RESOURCE_BARRIER_MISMATCHING_COMMAND_LIST_TYPE to D3D12_INFO_QUEUE_FILTER during device creation (see DirectX 12 application is crashing in Windows 11). The only trouble is that none of the sample programs change to fullscreen (i.e. borderless windowed) mode when pressing the Alt+Enter key combination. The programs always stay in windowed mode.
This hasn't worried me so far, because I've been copying the raytracing code over to a template (based on DirectX Tool Kit for Windows desktop) where fullscreen toggling works properly. In this way, I was able to run the HelloWorld and SimpleLighting samples successfully in both windowed mode and fullscreen (2560x1440 monitor resolution).
However, this hasn't been so successful for the ProceduralGeometry sample, which introduces intersection shaders. Once again, the original sample program renders the scene properly, but only in a bordered window. But when the code is reproduced in the template where I can toggle to fullscreen, the raytraced scene does not render properly.
In the scene, the triangle geometry used for the ground plane of the scene renders ok, but a translucent bounding box around the fractal pyramid is visible, and all other procedural geometry also appears translucent. Every couple of seconds, the bounding box for the metaballs also appears briefly, then vanishes.
I was able to determine that by freezing the scene, the reason for the translucency was that the following frames were being presented in sequence:
triangle ground plane quad only
floor geometry plus opaque fractal pyramid bounding box
all of the above plus opaque metaball bounding box
completed scene with opaque geometry and no bounding boxes
At the native framerate (165Hz on my machine), this results in both the procedural geometry and bounding boxes always being visible, but 'see-through' due to all the partially complete frames being presented to the display. This happens in both windowed and fullscreen modes, but it's worse in fullscreen, because the scene gets affected by random image corruption not seen in windowed mode.
I've been grappling with this issue for a few days and can't work out the problem. The only changes I've made to the sample program are the Windows 11 fix, and using a template for proper fullscreen rendering, which the original sample ignores or doesn't implement properly.
Hopefully someone can shed light on this perplexing issue!
I found the problem. Each sample has a header file called DXSampleHelper.h. For the ProceduralGeometry sample, this header file was updated with a helper class to manage structured buffers, which is very similar to the helper class for constant buffers.
The CopyStagingToGpu() method, which consists of a one line memcpy operation in both classes, is slightly different for the structured buffer class:
memcpy(m_mappedBuffers + instanceIndex * NumElementsPerInstance(), &m_staging[0], InstanceSize());
The same method in the constant buffer class is:
memcpy(m_mappedBuffers + instanceIndex, &m_staging[0], InstanceSize());
I.e. I was missing instanceIndex * NumElementsPerInstance() and thus the procedural geometry instances within the structured buffer were not correctly aligned in GPU memory.
I was curious of the new "turn on/off" background blur functionality of Google Meet (currently in test). I have investigated a bit and it seems it is using Tensorflow Lite models:
segm_heavy.tflite
segm_lite.tflite
via WASM
mediapipe_wasm_simd.wasm
while the model graph should be
background_blur_graph.binarypb
The model seems works at the level of the HTMLCanvasElement as far as I can see. Anyone aware of a similar model?
[UPDATE]
Thanks to Jason Mayes and Physical Ed I was able to reproduce a very close background blur effect in the Google's BodyPix demo
The settings of the application are showed in the Controls box. There is a backgroundBlurAmount option that let you customize the blur percentage to apply as well.
The result is almost close to the official Google Meet application.
majority of segmentation models give alpha channel as a result (some give more, but alpha is most useful) - what is masked and what is not
so if you want to blur the background, its a multi-step process:
resize input to model expected size
run model to get alpha channel
resize output back to original size
draw original image on canvas
draw alpha channel over it so only foreground stays visible
for example using ctx.globalCompositeOperation = 'darken'
optionally blur it a bit since model output is never perfect
for example using ctx.filter = blur(8px)`;
so if you want to blur the background, simply apply apply blur simply copy canvas from 4, apply blur on it and draw if back before going to step 5
regarding models, google meet is not bad but i had better results with google selfie model
bodypix is older model, great configurability but not that great results
example code: https://github.com/vladmandic/human/blob/main/src/segmentation/segmentation.ts
I have been trying to achieve gradient color for the oxyplot graphs.
Some old blogs saying that gradient color is not supported by oxyplots. Could anyone suggest any tweaks to achieve the below kind of view?
And also any suggestions are open to which graphs can be used apart form oxyplots in xamarin.
enter image description here
I'm trying hard to nicely blur a red circle but everytime i get gradient levels of red and the image looks choppy.
Before:
http://i.imgur.com/6yzMhFI.png
After:
http://i.imgur.com/2dZl4ph.png
How i can acheive a smooth blur ?
If you are referring to the visible circles that separate the gradation levels, that is called banding Here are some ways to fix that:
Increase your document's bit level from 8-bit to 16-bit
This will increase the amount of colors your file can represent, creating more colors that can be used to represent the gradient, making it smoother in appearance.
In Photoshop navigate to Image>Mode>16-Bits/Channel
In GIMP 2.10 (or higher?), navigate to Image>Precision>16 bit..
Display or system settings might be unable to display enough colors
If changing the bit depth does not fix the issue then you might have a hardware or system settings issue.
If it's a hardware issue, your monitor might not have the capability to display enough colors to render the gradient smooth
If it's system settings you will need to go to your operating systems color depth setting, usually located under the system's display settings. It could say something like Millions of Colors, or True Color (32-bit).
The last thing related to settings is that you have a bad color profile set in your system or in your image editing software. It's beyond the scope of this answer. If you don't know how to color calibrate your monitor, then it most likely isn't this and you can skip this.
If you have to have 8-bits
If you absolutely have to keep your document in 8-bit color space then you will have to use dithering or add some noise to your image to confuse the viewers brain into seeing a smooth gradient.
Noise or dithering will confuse the viewers brain into seeing a smoother gradient by setting some focus on the imperfections of the noise/grain/dithering. This doesn't exactly answer your question, but it is about the only option you have if you keep your ultra smooth gradient in 8-bit mode.
Good Luck!
I think you are applying the Gussain-Blur to the entire image try to Select the red circle and apply the Gussain-Blur filter to it
I am using cytoscape.js version 2.0.3 for creating graph. I have noticed a problem that sometimes entire canvas drawn by cytoscape.js becomes black and after few seconds, it recovers. This problem occurs when some event (e.g., 'tap', 'cxttap') occurs, especially for large graph. What should I do to avoid it? Please help.