Top "Image-manipulation" questions

Image manipulation is the term used to describe various operations applied to images such as resizing, removing noise, or alteration of colour depth.

Image downsampling algorithms

What's the best re-sampling algorithm I can use to divide an image into half its original size. Speed is of …

c++ c image image-processing image-manipulation
How to resize or change resolution of base64 image through manipulating the base64 code?

There are lots of examples of encoding images to Base64. Is there a way of changing the size or resolution …

javascript base64 image-manipulation
Java - I need a very fast image scaling algorithm

I am working on a Midlet application. I am finding myself in the need to scale images very often. This …

java image-processing image-manipulation midp image-scaling
How to proportional resize image of any type in .NET?

Is possible to resize image proportionally in a way independent of the image type (bmp, jpg, png, etc)? I have …

c# .net graphics image-manipulation
GD! Converting a png image to jpeg and making the alpha by default white and not black

I tried something like this but it just makes the background of the image white, not necessarily the alpha of …

php image-processing image-manipulation gd
Creating mask with CGImageMaskCreate is all black (iphone)

I'm trying to create an image mask that from a composite of two existing images. First I start with creating …

iphone objective-c cocoa-touch image-manipulation quartz-graphics
Imagemagick - Resize images to 25px height and aspect ratio

OK, so I have a folder of like 16 images all between the dimensions of 205x150 to 103x148. I want to …

image imagemagick image-manipulation
jpegtran optimize without changing filename

I need to optimize some images, but not change their name. jpegtran -copy none -optimize image.jpg > image.jpg …

linux image image-processing image-manipulation
Slicing up a UIImage on iPhone

Objective: take a UIImage, crop out a square in the middle, change size of square to 320x320 pixels, slice up …

iphone objective-c cocoa-touch image-manipulation
How to convert XCF to PNG using GIMP from the command-line?

As part of my build process I need to convert a number of XCF (GIMP's native format) images into PNG …

image-manipulation gimp script-fu