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set X plane and Y plane value matlab

[1 Reply]
- 01-Aug-2012 12:45 AM
- Forum: Processing with Other Languages
Hi,
i'm nuwb in image programming..

i have a image in rgb color space, then i want to show the cb vs cr plane.

of course i convert the image to YCBCR color space first.

then i get cb and cr value from ycbcr image,

but i don't know how to display image in cb cr plane,

so, the X axis is CR value and Y axis is Cb value.

this is my code,

clear

clc

%---- Global Variable

im = imread('tangan.jpg');

YCBCR = rgb2ycbcr(im);

% crop image

I2 = imcrop(im,[750 680 130 112]);

cb = I2;

%Y component

cb(:,:,1) = 0;

% CB Component

%cb(:,:,2) = 0;

% CR Component

cb(:,:,3) = 0;

cr = I2;

%Y component

cr(:,:,1) = 0;

% CB Component

cr(:,:,2) = 0;

% CR Component

%cb(:,:,3) = 0;

imshow(cb), figure, imshow(cr);

Javascript and processingjs

[1 Reply]
- 02-Jun-2012 06:50 PM
- Forum: Processing with Other Languages
Hi, i a nuwb using processingjs, i have a little problem.
i want to insert a text (using textarea) to my canvas, so the user can input a text from the textarea, after click a button, the text appear to the canvas, but it never appear.. there is my code:
2. <html>
3. <head>
4. <title>Input</title>
5. <script src="processing.js"></script>
6. <script type="text/javascript"></script>
7. <script type="text/javascript">
8. function drawSomeText(id) {
9. var pjs = Processing.getInstanceById(id);
10. var text = document.getElementById('inputtext').value;
11. pjs.drawText(text); }
12. </script>
13. </head>
14. <body>
15. <center><p>
16. <script type="application/processing" data-processing-target="mycanvas">
17. PImage img;
18. void setup(){
19. frameRate(30);
20. img = loadImage("data/jaket.jpg");
21. size(400, 400);
22. }
23. void show_letter(){
24. PFont fontA = loadFont("Arial");
25. textFont(fontA, 20);
26. textAlign(CENTER);
27. fill(255);
28. letter = "testing";
29. text(letter, 100, 100);
30. }
31. void draw(){
32. background(img);
33. show_letter();
34. }
35. </script>
36. <canvas id="mycanvas" width="400" height="400"></canvas>
37. <input type="textfield" value="my text" id="inputtext"/>
38. <button onclick="drawSomeText('mycanvas')"></button>
39. </p></center>
41. </body>
42. </html>
Please help me..
thanks,

disable or set off a button

[2 Replies]
- 22-Dec-2011 10:22 AM
- Forum: Contributed Library Questions
hi all,
i have project to my study.

i'm work with button controlP5 in java processing. and there is an grayscale button, about, and help button, also open file, reset and another button.

my question is, when i click about or help button, then the grayscale button is set to off (can't press the grayscale button) until press the reset button.

how can i do that?

reset button.

[4 Replies]
- 21-Dec-2011 09:03 PM
- Forum: Programming Questions
hi all,

i have a project for my study, i make a program using processing, to make histogram of image, then equalize the histogram. when i press the button equalize, then i want to make a button that the function to reset the image, so the image have the original color value, how can i do that?

i'm try create function to save pixel value in an array. but, it still didn't work, when i press the reset button there is no chage with my image. because value that be read with reset function is value after equalize.

can you give me some solution??

thanks,

input matrix

[1 Reply]
- 21-Dec-2011 08:43 PM
- Forum: General Discussion
How to make input field....for my system.....
to process konvolution....

create controlP5 button.

[2 Replies]
- 18-Dec-2011 07:58 PM
- Forum: Contributed Library Questions
hay everyone, i'm using java language in processing.org.

i wanna creat button to convert rgb image to grayscale image, here my code:

this to create the button in windowControl:
1. Controller Button3 = controlP5.addButton("grayscale", 0, 40, 150, 50, 18);
2. Button3.setWindow(windowControl);
and this to convert rgb image to grayscale:
1. public void grayscale(PImage img) {
2. for (int j = 0; j < img.height; j++) {
3. for (int i = 0; i < img.width; i++) {
4. color c=get(i, j);
5. float r = red(c);
6. float g = green(c);
7. float b = blue(c);
8. int grayscale= (int)(r+g+b)/3;
9. color grayscale2 = color(grayscale, grayscale, grayscale);
10. set(i, j, grayscale2);
11. }
12. }
13. }

about brightness of image

[5 Replies]
- 16-Dec-2011 07:53 AM
- Forum: Programming Questions
can we count the brightness of an image without library in processing?? and then draw histogram of that image??
i see in http://processing.org/learning/topics/histogram.html that using library brightness to count the value.

please help..

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