Adding two byte arrays in android

Question

I'd like to combine two byte arrays which represent images (so they're the same size) into a third byte array which will be the average of the two starting images. Here's the code I'm trying at the moment:

        byte[] facemash = new byte[data1.length];

        for (int i=0; i < data1.length; ++i){
            facemash[i] = ((data1[i]/2)+(data2[i]/2));
        }

What I'm getting in Eclipse is an error telling me 'Type mismatch: cannot convert from int to byte.' Can anyone see where I'm going wrong here?

Many thanks

President James K. Polk · Accepted Answer · 2012-12-01 13:34:32Z

1

java converts bytes to ints in arithmetic ops. Just cast the result to (byte) since you know it can't overflow.

answered Dec 1, 2012 at 13:34

President James K. Polk

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Comments

TieDad · Accepted Answer · 2012-12-01 22:28:30Z

1

facemash[i] = (byte)((data1[i]/2)+(data2[i]/2));

edited Dec 1, 2012 at 22:28

answered Dec 1, 2012 at 13:35

TieDad

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2 Comments

Ned Yoxall Over a year ago

Thanks, but this is still giving me the same error (I've already declared data1 and data2 as bytes in the code)

TieDad Over a year ago

I changed my answer, then it should be ok.

kleopatra · Accepted Answer · 2012-12-01 16:38:22Z

0

try:

facemash[i] = (byte)((byte)(data1[i]/2)+(byte)(data2[i]/2));

edited Dec 1, 2012 at 16:38

kleopatra

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answered Dec 1, 2012 at 16:17

vurtne.ye

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