Calculating rgb vals for BufferedImage

Posted by Hamza Yerlikaya on Stack Overflow See other posts from Stack Overflow or by Hamza Yerlikaya
Published on 2010-03-20T18:16:32Z Indexed on 2010/03/20 18:21 UTC
Read the original article Hit count: 516

Filed under:

clojure

|

bufferedimage

|

bit-manipulation

I am using following snippet to build a 32 bit integer to use with setRGB of BufferedImage


(bit-or (bit-shift-left a 24)
          (bit-or (bit-shift-left r 16)
              (bit-or (bit-shift-left g 8) b)))

after writing colors reading them back reveals wrong colors is there a fault in my logic?

© Stack Overflow or respective owner

Related posts about clojure

StackOverflow in compojure web project

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I've been playing around with clojure and have been using it to build a simple little audio player. The strange thing is that sometimes, maybe one out of twenty, when contact the server I will get the following error: 2010-04-20 15:33:20.963::WARN: Error for /control java.lang.StackOverflowError … >>> More
Wrong number of args passed to: repl$repl

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have a trouble with a compojure "Getting started" example that I do not seem to understand. When I run the example from http://weavejester.github.com/compojure/docs/getting-started.html ...I get the following error at the lein repl step: ~/hello-www> lein repl src/hello_www/core.clj Exception… >>> More
Setting the Classpath and Accessing code from book: Programming Clojure

as seen on Stack Overflow - Search for 'Stack Overflow'
(I posted this same question on the Clojure list but haven't got an answer yet. Is anyone here ready to help?) I am going through Programming Clojure and I recently downloaded the code from the books official website. For other utils I can do, for example, (require 'clojure.contrib.str-utils) and… >>> More
How can I define a clojure type that implements the servlet interface?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm attempting to use deftype (from the bleeding-edge clojure 1.2 branch) to create a java class that implements the java Servlet interface. I would expect the code below to compile (even though it's not very useful). (ns foo [:import [javax.servlet Servlet ServletRequest ServletResponse]]) (deftype… >>> More
Stack overflow in compojure web project

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I've been playing around with clojure and have been using it to build a simple little audio player. The strange thing is that sometimes, maybe one out of twenty, when contacting the server I will get the following error: 2010-04-20 15:33:20.963::WARN: Error for /control java.lang.StackOverflowError … >>> More

Related posts about bufferedimage

Using Graphics2D to overlay text on a BufferedImage and return a BufferedImage

as seen on Stack Overflow - Search for 'Stack Overflow'
I have checked similarly named questions, but they don't answer this use case. Basically, I was to overlay some text (text) at a given coordinate (x,y) I have the below function in a package; protected BufferedImage Process2(BufferedImage image){ Graphics2D gO = image.createGraphics(); gO… >>> More
How to specify behavior of Java BufferedImage resize: need min for pixel rows instead of averaging

as seen on Stack Overflow - Search for 'Stack Overflow'
I would like to resize a Java BufferedImage, making it smaller vertically but without using any type of averaging, so that if a pixel-row is "blank" (white) in the source image, there will be a white pixel-row in the corresponding position of the destination image: the "min" operation. The default… >>> More
Getting Greyscale pixel value from RGB colourspace in Java using BufferedImage

as seen on Stack Overflow - Search for 'Stack Overflow'
Anyone know of a simple way of converting the RGBint value returned from <BufferedImage> getRGB(i,j) into a greyscale value? I was going to simply average the RGB values by breaking them up using this; int alpha = (pixel >> 24) & 0xff; int red = (pixel >> 16) & 0xff; int… >>> More
Java: Send BufferedImage through Socket with a low bitdepth

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, The title says enough I think. I have a full quality BufferedImage and I want to send it through an OutputStream with a low bitdepth. I don't want an algorithm to change pixel by pixel the quality, so it is still a full-quality. So, the goal is to write the image (with the full resolution) through… >>> More
Calculating rgb vals for BufferedImage

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using following snippet to build a 32 bit integer to use with setRGB of BufferedImage (bit-or (bit-shift-left a 24) (bit-or (bit-shift-left r 16) (bit-or (bit-shift-left g 8) b))) after writing colors reading them back reveals wrong colors is there a fault in my logic? >>> More