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Hi,
I have an app showing 2 windows with exactly the same images (taken from a Video stream)
I would like to make one of those images brighter than the other
I've created a simple method to increase the brightness of each pixel in the image
Because I've seen the method was returning images inverted in x and y I've commented out the part that change brightness on the pixels so the following code should not do anything else other than loadPixels() and updatePixels()
class ImgProcess {
ImgProcess () {
}
void setBrightness (PImage pi, int brightness_level_percent) {
int ba = (int) ((float) brightness_level_percent * 2.55);
pi.loadPixels();
//for (int iii = 0; iii < pi.pixels.length; iii++) {
// int r = (int) constrain(red(pi.pixels[iii]) + ba , 0, 255);
// int g = (int) constrain(green(pi.pixels[iii]) + ba, 0, 255);
// int b = (int) constrain(blue(pi.pixels[iii]) + ba, 0, 255);
// pi.pixels[iii] = color(r, g, b);
//}
pi.updatePixels();
}
}
This code is still inverting axis for the image
I have the feeling this is a trivial mistake I'm doing here!!!
Any idea why calling this method swap x and y of my image?
Thanks, Marco
Answers
I've narrowed down the weird behavior to a simple example
In my case the following code draw a line from the top-left to the bottom right
But if I'm adding back the two lines:
I'm actually getting a line from top-right to bottom-left
I've also found how to solve the issue: remove the P3D renderer from size() and createGraphics()
Can somebody confirm this is a real problem or is just an issue with my machine?
Thanks, Marco
Hey
I have the same problem. I solved it by using updatePixels() instead of offscreen.updatePixels()
I do find it odd. For this case I will stick to what I have seen in examples: they call updatePixels() by itself.
Kf
Hi Kf,
Thank for confirming that.
(Unfortunately I can't use just updatePixels(); my final code is more complex than my example here.)
I've opened a issue ticket in GitHub
https://github.com/processing/processing/issues/4637
Marco