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Questions tagged [image]

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1
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1answer
25 views

How does a GLSL Sampler2D read a Vec2 UV coordinate to determine UV range

I am working with an atlas shader that steps through various sprite tiles within a single png atlas page to playback an animation with sampler2D. Looking at the shader code, I would expect to have to ...
7
votes
1answer
71 views

Bitmap-images or SVG

I'd like to create a GUI in my first Unity-game (2D). I want my GUI appear sharp in all resolutions (e.g. 1920x1200 or 3840x2160). The problem I am facing now is that I don't know if I should save my ...
5
votes
1answer
179 views

What algorithm to reassemble a broken image?

What algorithm can I use to reassemble a broken image? Is there any technique? algorithm? Can I use graphs? machine learning? computer graphics?
0
votes
0answers
109 views

OpenGL - Fit High/Low Resolution Image/Texture to a particular size Window

Consider a ray tracer written in OpenGL and using GLFW as a window toolkit. There are basically 2 options to display the ray-traced image. 1) Create a RenderBuffer ...
1
vote
1answer
41 views

Is there a general way how to specify the “image compression loss”?

For JPG, i can choose the "quality" from 100 to 0, which means that any pixel information is divided by 1 (quality = 100) or a very high number (quality = 0). This results in less or more "artifacts", ...
0
votes
1answer
53 views

Difference between Cropping, Scaling, Resizing & Changing Aspect Ration of an Image?

I've got a new task related to image processing in a website. I am too confused in understanding different terms used with sizing of an image. What is the difference between: Cropping an image ...
0
votes
1answer
104 views

What is the typical use case for rendering to an image through imageStore?

The typical scenario for using a texture would simply be: ...
1
vote
0answers
46 views

Tanget plane of an image

My problem is about tangent plane. I have an image (m by n). I obtain surface normal vector using machine learning methods. Then i would like to obtain tangent plane for this surface normal. To ...
1
vote
0answers
51 views

How to make Convolved Diffuse and Specular image in C#

I am trying to take either a HDR panoramic or HDR cubeMap and from that create a Lambert Irradiance environment map and a Cook-Torrence Specular environment map. I am stuck at the proper ...
3
votes
1answer
71 views

Why isn't the clear color visible on the screen between frames?

I am told that in computer graphics, the screen refreshes in number of times(in this scenario let say that it renders 60 times per second). The screen is cleared and drawn to 60 times per second. My ...
1
vote
2answers
78 views

How do I do batch conversion (preferably in MATLAB) from .gif images to .off or .stl mesh files? [closed]

I'd like to do a batch converison of 1400 .gif images into .off or .stl format files that'll be meshed images. Two sample .gif images are attached. How can I do this conversion possibly by a free ...
1
vote
0answers
63 views

How to merge multiple exr into a single multilayer exr?

Are there some tools or softwares to merge multiple exr into a single multilayer exr? I only find a tool to split a multilayer exr into multiple exr. And it seems that Blender, Mitsuba, Darktable ...
4
votes
1answer
45 views

can half of a picture be processed and viewed?

Lets say i have a picture. I send it to a server. While sending it to the server half way the upload gets canceled. Now the server has half or some of the picture. Now is there a way in which this ...
4
votes
1answer
356 views

How can I remove aliasing in an image without introducing blur?

I am trying to reduce aliasing in an image using some filters. I tried the Gaussian variant of filters to remove the said high frequency patterns in the image, but I feel it's a bit too much of a blur....
1
vote
1answer
140 views

LWJGL/OpenGL render textured quad

So this should be easy and simple, but I still can't get it to work. All I need is a small example program that: Takes in a BufferedImage (TYPE_INT_ARGB) Renders that BufferedImage on a textured quad ...
6
votes
1answer
738 views

LWJGL/OpenGL get BufferedImage from texture ID

I have got a texture ID and would like to retrieve its data. The data should be stored in a BufferedImage for future use. I am using the LWJGL library in Java, so ...
4
votes
2answers
453 views

How linear interpolation works between mipmaps?

Nearest interpolation between 2 texels mean to take the texel whose center is nearest to a given coordinate to draw or, in other words, the texel the coordinate is matching. Linear interpolation ...
1
vote
2answers
237 views

Explanation of a the transparency of an .EXR file

Simply put, what does the transparency data of an EXR file represent?
7
votes
1answer
1k views

Depth of Field in Path Tracing: What do I do with the secondary ray?

How can I implement Depth of Field in my Path Tracer? I have read this article which explains the theory behind everything & I already have a good understanding of what this effect needs to ...
1
vote
3answers
240 views

How are the colors for each pixel from a Ray Tracer stored in an Image?

I have begun learning how to create a Ray Tracer and 1 thing I am confused about is how the pixel color from a Ray Tracer is stored into an image. Do we use SetPixel...
1
vote
1answer
54 views

Compression-friendly PNG files

How to create PNG files optimized for being compression-friendly? I.e. would it help if image is created (mostly) from 8x8 unicolor blocks?
1
vote
0answers
48 views

How do you sample an analogue image and store it in a true-colour frame buffer? [closed]

I really cannot get my head around on this issue - how does an analogue image is sampled and then stored in a ture-colour frame buffer (e.g. in a camera) and how do you prevent noise when you do so? ...
6
votes
2answers
108 views

Is there a image-format that support an array per pixel?

For a project dealing with deep semantic labeling of images I need a format that supports arrays of arbitrary length for each pixel of the image. The array is an array of integers. Which image ...
8
votes
2answers
2k views

What is bilateral upsampling?

I've worked with various interpolation algorithms including linear, cubic (and bilinear and bicubic), other bezier (and nurbs, etc) based interpolations, lagrange interpolation and some others, but I ...
7
votes
1answer
846 views

What happens when you display a high resolution image on a low resolution screen?

For a non-computer graphics expert, what happens technically when you do this? Are multiple pixels merged to one to compensate for the lower resolution? And in how far will this affect the image ...
4
votes
1answer
81 views

Is there a way to script image creation?

I am facing a though challange - I need to perform repetitive Image formating. Firstly, I need resize picture A so that it has some fixed width in pixels. Then, I need to place picture A in the middle ...
7
votes
3answers
273 views

How to denoise video?

Video noise is random and not correlated in time. I assume, the best method is using wavelet denoise in this case, right? If yes, how is wavelet denoise implemented for video? Is there something to ...
10
votes
1answer
149 views

When creating a JPEG, how can I minimize the occurence of artifacts?

There are 2 main factors that seem to lead to digital artifacts when creating JPEG images: Aliasing and Compression. Example: Converting a PNG with characters on it to a JPEG or placing vector ...