I'm using OpenGL ES on a low-resolution, embedded device. I've applied a vertical color gradient, using vertex coloring, to a large polygon serving as a backdrop to my rendered scene. I can see clear visible banding artifacts in the color gradient. My main experience is using software renderers. With software renderers it is common to ...
I want to draw one picture over another and dump it to HttpResponse. My code looks like this: //file name points to a gif image System.Drawing.Image originalImage = System.Drawing.Image.FromFile(filename); System.Drawing.Image smallImage = System.Drawing.Image.FromFile(smallFilename); using(Bitmap tempImage = new Bitmap(originalImage))...
I'm developing a custom thin-client server that serves rendered webpages to its clients. Server is running on multicore Linux box, with Webkit providing the html rendering engine. The only problem is the fact that clients display is limited with a 4bit (16 colors) grayscale palette. I'm currently using LibGraphicsMagick to dither images...
Consider the following code: from PIL import Image, ImageDraw, ImageFont def addText(img, lTxt): FONT_SIZE = 10 INTERLINE_DISTANCE = FONT_SIZE + 1 font = ImageFont.truetype('arial.ttf', FONT_SIZE) lTxtImageHeight = INTERLINE_DISTANCE * len(lTxt) # create text image lTxtImg = Image.new('RGBA', (img.size[1], l...
As you can see from the screenshot below, the "titlebar" is getting these ugly banding lines across the areas with text that extend the entire width of the screen. It's even more noticeable on a real device. Is there any way to work around this? ...
Several answers mention to use GradientDrawable.setDither(true) to draw smooth gradients in Android. That has no effect in my code. Any idea what I have to change to get a well looking gradient in my live wallpaper? GradientDrawable gradient = new GradientDrawable(Orientation.TL_BR, colors); gradient.setGradientType(GradientDrawable.RAD...
I am using WPF for an image resizing pipeline which has been working beautifully under .NET v3.5. I just upgraded the project to target v4.0 and now all of my resized images are heavily aliased. None of the image pipeline code has changed. Has a default WPF setting changed between v3.5 and v4.0? How do I control the dithering of my res...
I know that Floyd–Steinberg dithering algorithm can't be implemented with pixel shader, because that algorithm is strictly sequential. But maybe there exist some higly parallel dithering algorithm which by it's visual output is similar to Floyd-Steinberg algorithm ? So the question is - What are dithering algorithms which are suitable t...