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Questions tagged [image-manipulation]

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

Image manipulation is the term used to describe various operations applied to images such as resizing, removing noise, alteration of colour depth. These operations are usually performed to improve the quality of the image (such as the removal of noise) or to alter it so that the image file is better suited to its intended usage(such as resizing to meet display constraints on a mobile device).

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Color overlay image effect in silverlight

I am not sure if this is possible or not, but here is the goal: Mixed-transparency PNG image is grabbed from relative URL (to silverlight app) All pixels in image are then changed to a specified color without altering opacity (ie, transparent px…
caesay
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How can I get the exact location of cursor on image in Picturebox

I have the picture box in which the image may be zoomed with different values. Then I try to find out the location of cursor on picture box. I write the following code on picture box mouse move event: int x = (2 * e.X - pictureBox1.Width +…
qulzam
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iPhone saved png is different after I load it back

I want to modify a .png image and save it to a folder. convert the uiimage to NSData modify some pixel create a new UIImage from the modified NSData save this UIImage to a folder set this same UIImage to an ImageView's image property If I check…
Dávid Kaszás
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OpenCL script giving unexpected results

I have this simple block of OpenCL code, and I am getting unexpected results. The parameters image is an array of floats and value is a number from -255 to +255. Using java I use a JSlider to change the value. The default value is 0 and the problem…
Get Off My Lawn
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Automatically adding watermark on image download

Is it possible to add a watermark when someone downloads an image from your website? If yes, what's the best way to do it? Thanks in advance.
coldpumpkin
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How to change the color values of the operating system

I'm doing research about a schoolproject. The project is to develop a program that can change the colors of the screen (of the OS aswell of all programs that run on it). The endproduct is supposed to be a single program that is able to change the…
Arnaud H
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Single color on generated image

My script glues several images into one image but result image have single color dominated on first image from glue images set: But input 4 images are in different colors (yellow, green, blue, red). Only first image from set is looks…
Dmytro Zarezenko
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What is the best library for image manipulation in .net?

I'm working on an asp.net MVC web application and I need a library for image manipulation. What is the best library for this case? I prefer to use an open source library.
Mehrdad Bahrainy
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Adding Height to Image for Subtitle

i want to add an additonal height to an Image to give it a subtitle. I do not want to "compres" or resize my original image. I want to keep it's size and add +40 px to its height on bottom and add a text like this example The red part is the…
pila
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How can i make pictureboxe on the form more fastly on runtime in .net winforms?

I want to select the pictures (They are select during program is running) and show them on the form. for that i take a panel on the form and populate the panel with pictureboxes.i write the following code for that but it is very time…
qulzam
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Basic manipulation of a UIImage

I'm learning about basic manipulation of UIImages using Objective-C on iOS. Say I have a square 128x128 image. How can I crop the bottom half of the image and store just the top half in a 128x64 image?
SundayMonday
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Encode a JPEG File

I have a file of bytes that represent a .jpeg image. However, when I try to open the image, I get an error that indicates my file is of incorrect format. I'm a little thrown off by this as the bytes in the file look like they should work. In what…
NSchulze
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GIF file creation library with full GIF support

There are many libraries for saving images in GIF format, but is there a library with support for GIFs more advanced (or archaic and forgotten if you will) features? I am thinking about the plain text extension, as well as the ability to redraw only…
Prof. Falken
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Tricky maths problem when resizing images

I have an image that I want to be watermarked to the bottom right section of other images. The dimensions of the watermark image are 179 width, 39 height. Now what if I have another image whose dimensions are 150 width, 20 height? If we tried to…
Ali
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jquery running a plugin on click event

I am using this plugin to manipulate some images on a wesbite I am working on. What should happen is that when the page loads the users see 5 examples images of the filters they can apply to their display picture. When they decide what effect they…
Udders
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