Darkening an image with CSS (In any shape)
Easy as img { filter: brightness(50%); }
png
Converting a byte array to PNG/JPG [closed]
You should be able to do something like this: using System.Drawing.Imaging; using System.Drawing; using System.IO; byte[] bitmap = GetYourImage(); using(Image image = Image.FromStream(new MemoryStream(bitmap))) { image.Save(“output.jpg”, ImageFormat.Jpeg); // Or Png } Look here for more info. Hopefully this helps.
Why should I use PNG and not JPG? [duplicate]
Major reason – PNG will give you advantage of Alpha Transparency over JPG. Also see: PNG vs. GIF vs. JPEG vs. SVG – When best to use?
Use PHP to convert PNG to JPG with compression?
Do this to convert safely a PNG to JPG with the transparency in white. $image = imagecreatefrompng($filePath); $bg = imagecreatetruecolor(imagesx($image), imagesy($image)); imagefill($bg, 0, 0, imagecolorallocate($bg, 255, 255, 255)); imagealphablending($bg, TRUE); imagecopy($bg, $image, 0, 0, 0, 0, imagesx($image), imagesy($image)); imagedestroy($image); $quality = 50; // 0 = worst / smaller file, 100 = better / bigger file … Read more
Only PNG supports transparency, is that true?
png-32 supports different levels of transparency. Each pixel can have an opacity between 0 and 255, with 0 as completely transparent. png-24 supports setting one color as fully transparent. Everything else will be opaque. gif uses a color palette. You can specify that one color in the palette is fully transparent. png-8 also uses a … Read more
ImageMagick extend canvas with transparent background
Use this instead: convert \ input.png \ -background none \ -gravity center \ -extent 100×100 \ output.png Note well: The order of the parameters is significant! (To convince yourself, just put -background none at the end of the parameters instead of the start…) Updated: Thanks to @jesmith who noticed that the commandline I originally provided … Read more
Free tool to Create/Edit PNG Images? [closed]
Paint.NET will create and edit PNGs with gusto. It’s an excellent program in many respects. It’s free as in beer and speech.
webdesign – jpg or png, which one is the best for web [closed]
It depends. PNG is better for crisp images with a low number of colours, JPG is better for a low-bandwidth image – however it is not as crisp and therefore not very good for GUI. Generally, JPG is for photos and pictures, whereas PNG (or GIF) is for layout. You may find this page interesting, … Read more
What is difference between png8 and png24
There is only one PNG format, but it supports 5 color types. PNG-8 refers to palette variant, which supports only 256 colors, but is usually smaller in size. PNG-8 can be a GIF substitute. PNG-24 refers to true color variant, which supports more colors, but might be bigger. PNG-24 can be used instead of JPEG, … Read more
R plot: size and resolution
A reproducible example: the_plot <- function() { x <- seq(0, 1, length.out = 100) y <- pbeta(x, 1, 10) plot( x, y, xlab = “False Positive Rate”, ylab = “Average true positive rate”, type = “l” ) } James’s suggestion of using pointsize, in combination with the various cex parameters, can produce reasonable results. png( … Read more