Thanks everyone for the answers and links.
I computed a pixel-to-pixel difference and indeed what I was getting was
-1/+1 differences in the gray values, due to rounding.
Next free time I'll try the other formulas.
Thank you again,
Rodolfo Carvalho
On Thu, Sep 29, 2016 at 6:12 AM, Micky wrot
On Thu, Sep 29, 2016 at 3:19 AM, Rodolfo Carvalho
wrote:
> gift [3]:
> y := 0.299*px.R + 0.587*px.G + 0.114*px.B
>
> I did not understand why image/color adds an extra 0.5 (500/1000) to y.
> Could anybody give me a clue?
>
To directly answer your question:
*GIFT also adds 0.5 to round off.
…
Michael
From: on behalf of Patrick Smith
Date: Wednesday, September 28, 2016 at 4:51 PM
To: Rodolfo Carvalho
Cc: golang-nuts
Subject: Re: [go-nuts] image: algorithm to convert to grayscale
Looks like it's just rounding to the nearest integer.
On Wed, Sep 28, 2016 at 3:
Looks like it's just rounding to the nearest integer.
On Wed, Sep 28, 2016 at 3:19 PM, Rodolfo Carvalho
wrote:
> Hello,
>
> I'm not an image processing expert, but was trying to write a small
> program to convert images to grayscale, just for the fun of it [1].
>
> First I managed to get somethi
