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Questions tagged [image-processing]

The tag has no usage guidance.

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0answers
25 views

How I can create HQx or xBR pixel art upscaling shader in GLSL?

I want to make an image scaling shader in OpenGL Shader Language... but I have no idea how to make it. I want to implement either the HQx algorithm or an xBR variant. My game engine is GameMaker: ...
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1answer
33 views

How to create a 32 bit red texture byte buffer

I want to make a red texture image buffer. Would anyone help me to make it in right way. I have tried following: ...
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2answers
122 views

Find appropriate camera-projector coordinates to project contours of real objects

I am developping a game (unity3d + opencv for image processing) where i detect real-life objects from the webcam on every frame, find their edges and then draw them on the real objects. I need to find ...
0
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1answer
50 views

Alpha Blending older Images

I am working on re-writing an old game, and have faced some issues with the older images that were used, the first thing we done was convert all the old images and set the alpha channel on black ...
3
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1answer
134 views

How do I detect a given sprite's bounds automatically using Java?

Background I have the following png file that contains the player sprite. As with any png file, the non-colored pixels are ...
1
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0answers
284 views

Passing an UAV to a Pixel Shader in DirectX11

I have a compute shader which task is to take an input image and then blur it using a Gaussian filter approach. The input and output for the compute shader looks like this: ...
2
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1answer
345 views

Applying a face image to a mesh head

I'm playing around with 3D graphics programming and it's only a few weeks I'm into OpenGL and able to render meshes with textures with few basic transformations. I've a hobby project where I want to ...
1
vote
1answer
38 views

Any resources for how to read image files [closed]

I'm learning opengl and I'm the kinda guy who likes to write things from scratch and I was searching for how I can read image files data to create my own image importing library to use for textures ...
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0answers
66 views

Changing a section of texture at runtime in LibGDX

I have a talking tom sort of game in LibGDX for android; I want to be able to replace the head of the character with an image the user provides at run time. Any leads on how to do this?
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1answer
865 views

SharpDX Texture to Image in C#

I currently have an image processing application that outputs processed images post pixel shaders have been applied. However, using the examples I've found on the internet, the colors are flip to BGRA ...
0
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2answers
172 views

Gamemaker: images appear blurred in application

I'm making a practice game (generic space invaders clone) in Gamemaker Studio. However, there appears to be a problem with the images. While they look acceptable in Gamemaker Studio (not amazing, due ...
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1answer
137 views

can you explain the following java code for image processing? [closed]

here outdata is buffer of size[8*1024],can you tell me the exactly what will happened after execution of above lines??
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0answers
38 views

Pick a color and then Chop image with that color into 7 easy pieces

I have an image with 8 colors - (ROYGBIV and white) - I want to create 7 images - each has only one of the colors in the resulting image. I can do that fairly easily in GIMP. Next I need to chop each ...
0
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1answer
428 views

Alternative to System.Drawing for breaking an image into separate tiles in Unity

As far as I can tell, System.Drawing namespace is not available in unity. I there an alternative library to load and manipulate or generate images on the fly? ...
0
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0answers
130 views

2d Lighting over Sprites in C#

I am currently working under a project , a small application where i have to implement 2d lighting . For example , in the GDI+ canvas , a image will be drawn and i will have to put a lighting effect ...
0
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0answers
369 views

How to apply 2D LUT on image/video?

I would like to apply colour correction to image or video using LUT. The LUT correction script thats available in standard assets works with camera only. Would like to know how to apply LUT ...
1
vote
1answer
226 views

C++ : Library for creating 3d view picture [closed]

I've got a numerical simulation, where I have as an output 3d matrix of billion elements - the visualisation of data is 2d flat image: When I was starting I was just outputting 2d data to gnuplot, ...
1
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1answer
498 views

What can I do in Unity3D to optimize the way I'm calculating contrast of a texture2D?

I have this contrast script right now in Unity: ...
3
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1answer
1k views

How can I use a lookup table for brightness and contrast?

Currently, I implemented a rudimentary brightness and contrast algorithm that changes brightness and contrast pixel by pixel. This was super inefficient performance wise and the algorithm looked a bit ...
4
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2answers
2k views

Signed Distance Fields: How are different colour channels used to improve output of sharp corners?

The naive approach to implementing signed distance field font rendering suffers quality issues where sharp corners get softened (either outward- or inward-facing corners, i.e. convex or concave ...
1
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1answer
435 views

Getting normal map of an image

I'm trying to achieve the results in this tutorial: Link So far, I was be able to do that; with these; ...
1
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1answer
281 views

GLSL Processed Image to OpenGL

I've tried wording and rewording this question in various forms of search and can't seem to find an answer to it. If I'm wording it wrong and/or just not finding the right information, feel free to ...
5
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1answer
2k views

How to vectorize a raster image edges into SVG paths?

I'm having a lot of trouble figuring out how to convert a 2D list of points into an SVG Path representing a political map border. I have completed all parts of a 2D terrain generator, including ...
1
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2answers
3k views

How can I rotate a bitmap without D3D or OpenGL?

I've just figured out on my own how to scale a portion of a bitmap using PutPixel. I would like to know the mathematical theory behind rotating a bitmap on my own, ...