how assign image path?

[weidalin]

return :
400
{"request_id":"2022111111241301021001804606D4E147","time_elapsed":"24.80752ms","code":50207,"message":"Image Decode Error: image format unsupported","data":null}

how edit "
form.Add("image_base64", "")
"

form.Add("image_base64", imgPath)
or
image_base64 = toBase64(imgPath)
form.Add("image_base64", image_base64)?

[weidalin]

srcByte, err := ioutil.ReadFile(D:\\1.jpg)
if err != nil {
log.Fatal(err)
}

image_base64 := base64.StdEncoding.EncodeToString(srcByte)
form := url.Values{}
form.Add("image_base64", image_base64)

resp, status, err := visual.DefaultInstance.GeneralSegment(form)
fmt.Println(status, err)
b, _ := json.Marshal(resp)

how to write byte[] b to image?