Is it possible to determine if a given image is grayscale or color using JavaScript?
draw image to canvas
loop through image data
test for each pixel if red-cahnnel == green-channel == blue-channel (all color-channels have the same value)
if true for all pixels it is grayscale, if you hit the first pixel that does not meat the condition you can stop and it is color.
Take a look at http://www.pixastic.com/lib/docs/actions/colorhistogram/
This will easily provide the data you need to determine this.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With