I am getting this error trying to convert an image into a CvMat:
Error: Imencode - expected arg 0 to be a Buffer of Uint8 Values
This seems easy enough to fix, although I don't know how to convert an image into a Uint8Array, which is what the function is asking for. Here's my code so far:
request(url, function (error, response, body) {
let uint8Array = new Uint8Array(body);
let imageCvMat = cv.imdecode(uintArray)
})
I think you are opencv4nodejs for implementing your solution. I would like to direct your attention to a few aspects.
You can check it out here that imdecode & imencode accept buffers as input opencv4nodejs imdecode
So basically the issue that I have faced as well is that you are not converting your image into Mat using imdecode in first place. Kindly check the input you are providing & try fixing it.
My original goal was to be able to pass an image from a URL into cv.imdecode(). Turns out the way to do this is with a Buffer, and this works like a charm:
request(url, function (error, response, body) {
let buffer = Buffer.from(body);
let imageCvMat = cv.imdecode(buffer);
});