CODEWITHSUNDEEP
pythonopencvcomputer-visionhsv
user3818372
user3818372

Reputation: 61

error when converting from RGB to HSV

I'm trying to convert an image from RGB to HSV color space, here's a segment of my code:

import cv2
import numpy as np
import imutils

lower = np.array([0, 48, 80], dtype= "uint8")
upper = np.array([20, 255, 255], dtype= "uint8")

img = cv2.imread('3.JPG', 0)
img = imutils.resize(img, width = 400)
cv2.waitKey(1)

converted = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
new_skinMask = cv2.inRange(converted, lower, upper)

but I'm getting an error on:

converted = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)

the error is:

OpenCV Error: Assertion failed ((scn == 3 || scn == 4) && (depth == CV_8U || depth == CV_32F)) in cv::cvtColor

can anybody help me with this?

Upvotes: 2

Views: 1772

Answers (1)

alexisrozhkov
alexisrozhkov

Reputation: 1632

Last parameter in 

img = cv2.imread('3.JPG', 0)

stands for flags, and 0 is equal to CV_LOAD_IMAGE_GRAYSCALE (or IMREAD_GRAYSCALE). That's why you get the assertion about the number of channels.

If you want to load the image in color either:

  • remove this parameter, using default IMREAD_COLOR flag, or
  • replace it with CV_LOAD_IMAGE_COLOR (or IMREAD_COLOR).

Consider the doc for more detail.

Upvotes: 3

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