Error: Could not find MIME for Buffer <null> while using Jimp to save the buffer of cv.Mat()

Question

这是我产生错误的代码片段：

let mat = cv.Mat.zeros(cnn_size, cnn_size, 3);
savepath = "path/to/saved/image.jpg"
let bf = Buffer.from(mat.data);
Jimp.read(bf).then(data => {
    console.log(data);
    return data.resize(cnn_size, cnn_size).write(savepath);
}).catch(err => {
    console.error(err);
});

运行代码导致此错误：（节点：2152）UnhandledPromiseRejectionWarning：错误：找不到缓冲区 <null>.

的 MIME

Answer 1

我在做的一个项目中遇到了同样的问题。 axios 和 jimp.read 的组合对我有用。

axios({
method: 'get',
url: failingImageUrl,
responseType: 'arraybuffer'
})
.then(function ({data: imageBuffer}) {
 return jimp.read(imageBuffer)
})

来源https://github.com/oliver-moran/jimp/issues/775#issuecomment-521938738

Error: Could not find MIME for Buffer <null> while using Jimp to save the buffer of cv.Mat()

Error: Could not find MIME for Buffer <null> while using Jimp to save the buffer of cv.Mat()

javascript

opencv

jimp