ImageIO JPEG strange colors

[State Thirteen]

Hi,

I am using ImageIO to scale the image and to get a byte array for displaying it in WebBrowser. 

img = Image.createImage(input);
img = img.scaledWidth(300);

ImageIO imio = Display.getInstance().getImageIO();

ByteArrayOutputStream os = new ByteArrayOutputStream();

try {

        imio.save(img, os, ImageIO.FORMAT_JPEG, 1.0f);

     String encodedImg = WebBrowser.createDataURI(os.toByteArray(), mimeMap.get("JPG"));

} catch (IOException e) {

e.printStackTrace();

}

This is the result what i get in WebBrowser

If I save the image in PNG everything is ok.

I have tested it only on simulator though.  

[Shai Almog]

Hi,
odd. I would guess its a Java bug on the simulator. Since the ImageIO implementation for devices is radically different I wouldn't worry too much about it.
Which Java version/OS are you using?

[State Thirteen]

I am using Java 1.7 on win 7. What is you advice about which format is better to use on phones? Is it a big difference between PNG and JPEG? 

[Shai Almog]

For photos always go with JPG but I wouldn't go with your approach to scaling.
There is a second version of ImageIO save that accepts scaling arguments and is more efficient since it uses native scaling where applicable.

[State Thirteen]

Thanks. I'll try this.

[Jonata Russi]

Hi, State

Managed to solve?

[State Thirteen]

Hi Jonata,

I think this is an emulator, browser or JRE issue because on real devices there is no such problem.

On Wednesday, December 18, 2013 9:14:46 PM UTC+4, Jonata Russi wrote:

Hi, State

Managed to solve?