Canny edge detector: Difference between revisions
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=={{header|Go}}==
{{libheader|Imger}}
The example image for this program is the color photograph of a steam engine taken from the Wikipedia article linked to in the task description.
After applying the Canny edge detector, the resulting image is similar to but not quite the same as the Wikipedia image, probably due to differences in the parameters used though a 5×5 Gaussian filter is used in both cases.
Note that on Linux the extension of the example image file name needs to be changed from .PNG to .png in order for the library used to recognize it.
<lang go>package main
import (
ed "github.com/Ernyoke/Imger/edgedetection"
"github.com/Ernyoke/Imger/imgio"
"log"
)
func main() {
img, err := imgio.ImreadRGBA("Valve_original_(1).png")
if err != nil {
log.Fatal("Could not read image", err)
}
cny, err := ed.CannyRGBA(img, 15, 45, 5)
if err != nil {
log.Fatal("Could not perform Canny Edge detection")
}
err = imgio.Imwrite(cny, "Valve_canny_(1).png")
if err != nil {
log.Fatal("Could not write Canny image to disk")
}
}</lang>
=={{header|J}}==
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