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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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How to determine if numbers in an image are same or different, using Optical Character Recognition?

If I have the following 4 images: How can I determine that the two '6's are the same but 5 and 6, 6 and 9, 9 and 5, etc are not? The images will always be monochrome (i.e only black and white, no other colors) At the moment, I'm simply…
user2790209
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How to find different shades of a color in Java?

If I have the RBG code of a number, such as -16777216 (black), how can I find other similar shades of black using this color code? I'm trying to convert an image to monochrome by marking all pixels which are not -16777216 to be white. However, often…
user2790209
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C++ convert 24bpp bitmap to 8bpp bitmap in c++

I want to convert 24bpp bitmap file to a 8bpp bitmap file. The Source file has been converted to monochrome image(programattically) and now i have to change it to a 8bpp format. I am using ubuntu 10.10 so i cannot use windows libs. Also i don't want…
Abel Pandian
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Make image transparent in ruby

I was wondering if anyone could suggest to me potential libraries in ruby for manipulating jpegs? Specifically I want to make the image 50% transparent so it can act as an overlay. The image in question would be of a house and I'd like it to overlay…
Steve
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How can Multi-image TIFF files be split with PHP?

I've got a client who needs me to use PHP to split a TIFF image (which contains 2 or 3 images, sort of like an animated GIF) into its component images. Can ImageMagick or one of the other graphic libraries do this?
Trick Jarrett
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Incorrect PNG Colouring (Swapped channels?)

Please can someone take a look at the following image: http://img109.imageshack.us/img109/6885/colouring.png I need to make the bottom image the same as the first. It appears the colour channels are wrong, but I'm not sure and can't correct…
Rezzie
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Wrapping image around objects in web app

I'm creating a web app in ASP.NET like this one: http://www.zazzle.com/cr/design/pt-mug I know how to do everything except wrapping an image around an object. It would be a simple task to do if I would only have to stack an image on top of the…
ttkalec
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Display thumbnails in an object list using Django and django-imagekit

How do I display thumbnails for my item list....also is it possible to display just a specific thumbnail or a random thumbnail? So far I have this in my template: {% for p in item.images.all %} {{ p.get_thumbnail.url }} {% endfor %}
Stephen
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image editing function

I've created a function to overlay text onto images, but I'm scratching my head to find a way of outputting the image in a way in which it can be utilised within another script or outputted to the screen. I can call this function from a php script,…
MrFidge
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PHP image generator/handler

I'd like to create a PHP image generator that takes several query string parameters and generates an image on the fly. I've done this before in ASP.NET via a handler but now I'd like to in PHP. For example, I'd like a call to…
Mark Ursino
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Black color of ImageMagick vignette?

PHP Imagemagick API has a vignette function: http://www.php.net/manual/en/imagick.vignetteimage.php Great, but how do I get it with black color?
Peter Westerlund
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Split an image into pieces

I have a 128x1500 image that I need to split into pieces (matlab reads it as 1500x128). But regardless of how columns or rows are oriented, it is a rectangle that's wider than it is tall. I need to figure out how to just split it into 10 or so…
singmotor
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Benchmark for image or photo enhancement algorithm

I was wondering if anybody knows approaches or available set of images used to benchmark image enhancement algorithms. The type of image enhancement meant here is improving the aesthetic look of an image by changing its exposure, brightness,…
feradz
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setRGB() doesn't seem to change the color

could you please tell me why the pixels won't set to red Color myColor = new Color(255, 0, 0); int rgb = myColor.getRGB(); String fileName = Config.IMAGEFILEPATH + "first_nodal_domain " + "full.png"; …
user96454
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Displaying images from the web?

How to display an image using a URL of a known jpg, png ..etc. File ? I want an image , and I want it to be loaded from the internet from a particular website. With that done, I would like to make that image of an appropriate size... Say I put the…
user2266235
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