CODEWITHSUNDEEP
pythonwindowsopencv
Chandra Shaker Balure
Chandra Shaker Balure

Reputation: 1241

How to write text on a image in windows using python opencv2

I want to put some text on an Image. I am writing the code as:

cv2.putText(image,"Hello World!!!", (x,y), cv2.CV_FONT_HERSHEY_SIMPLEX, 2, 255)

It gives ERROR, saying 'module' object has no attribute 'CV_FONT_HERSHEY_SIMPLEX'

Query Can't I use the font type as above? I searched in internet, but found only the syntax related to to Opencv C++ for initFont. Then I thought of using putText to pass the font type as parameter. But it is not working for me.

Any suggestions?

Upvotes: 113

Views: 308524

Answers (9)

Arulkumaran
Arulkumaran

Reputation: 51

I use python 3 and this code below works fine for me.

import cv2

image = cv2.imread('lena.jpg',1)

font = cv2.FONT_HERSHEY_COMPLEX
cv2.putText(image,'Hello There',(0,100),font,2,(255,255,255),3)  #text,coordinate,font,size of text,color,thickness of font

cv2.imshow('image',image)

cv2.waitKey(0)

cv2.destroyAllWindows()

Upvotes: 5

Vinay Vemula
Vinay Vemula

Reputation: 3995

This code uses cv2.putText to overlay text on an image. You need NumPy and OpenCV installed.

import numpy as np
import cv2

# Create a black image
img = np.zeros((512,512,3), np.uint8)

# Write some Text

font                   = cv2.FONT_HERSHEY_SIMPLEX
bottomLeftCornerOfText = (10,500)
fontScale              = 1
fontColor              = (255,255,255)
thickness              = 1
lineType               = 2

cv2.putText(img,'Hello World!', 
    bottomLeftCornerOfText, 
    font, 
    fontScale,
    fontColor,
    thickness,
    lineType)

#Display the image
cv2.imshow("img",img)

#Save image
cv2.imwrite("out.jpg", img)

cv2.waitKey(0)

Upvotes: 174

Ajai
Ajai

Reputation: 1179

You can use cv2.FONT_HERSHEY_SIMPLEX instead of cv2.CV_FONT_HERSHEY_SIMPLEX in current opencv version

Upvotes: 1

gerard Garvey
gerard Garvey

Reputation: 263

I know this is a really old question but i think i have a solution In the newer versions of openCV fonts are repesented by a number like this

    FONT_HERSHEY_SIMPLEX = 0,
    FONT_HERSHEY_PLAIN = 1,
    FONT_HERSHEY_DUPLEX = 2,
    FONT_HERSHEY_COMPLEX = 3,
    FONT_HERSHEY_TRIPLEX = 4,
    FONT_HERSHEY_COMPLEX_SMALL = 5,
    FONT_HERSHEY_SCRIPT_SIMPLEX = 6,
    FONT_HERSHEY_SCRIPT_COMPLEX = 7,
    FONT_ITALIC = 16

so all you have to do is replace the font name with the corresponding number

cv2.putText(image,"Hello World!!!", (x,y), 0, 2, 255)

again i know its an old question but it may help someone in the future

Upvotes: 9

bunkus
bunkus

Reputation: 1025

for the example above the solution would look like this:

import PILasOPENCV as Image
import PILasOPENCV as ImageDraw
import PILasOPENCV as ImageFont
# from PIL import ImageFont, ImageDraw, Image
import numpy as np
import cv2

image = cv2.imread("lena.jpg")

# Convert to PIL Image
cv2_im_rgb = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
pil_im = Image.fromarray(cv2_im_rgb)

draw = ImageDraw.Draw(pil_im)

# Choose a font
font = ImageFont.truetype("Roboto-Regular.ttf", 40)

# Draw the text
draw.text((0, 0), "Your Text Here", font=font)

# Save the image
cv2_im_processed = pil_im.getim()
cv2.imshow("cv2_im_processed", cv2_im_processed)
cv2.waitKey()

Upvotes: -1

DollarAkshay
DollarAkshay

Reputation: 2122

I had a similar problem. I would suggest using the PIL library in python as it draws the text in any given font, compared to limited fonts in OpenCV. With PIL you can choose any font installed on your system.

from PIL import ImageFont, ImageDraw, Image
import numpy as np
import cv2

image = cv2.imread("lena.png")

# Convert to PIL Image
cv2_im_rgb = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
pil_im = Image.fromarray(cv2_im_rgb)

draw = ImageDraw.Draw(pil_im)

# Choose a font
font = ImageFont.truetype("Roboto-Regular.ttf", 50)

# Draw the text
draw.text((0, 0), "Your Text Here", font=font)

# Save the image
cv2_im_processed = cv2.cvtColor(np.array(pil_im), cv2.COLOR_RGB2BGR)
cv2.imwrite("result.png", cv2_im_processed)

result.png

Upvotes: 20

Ravinder Payal
Ravinder Payal

Reputation: 3041

Here's the code with parameter labels

def draw_text(self, frame, text, x, y, color=BGR_COMMON['green'], thickness=1.3, size=0.3,):
    if x is not None and y is not None:
        cv2.putText(
            frame, text, (int(x), int(y)), cv2.FONT_HERSHEY_SIMPLEX, size, color, thickness)

For font name please see another answer in this thread.

Excerpt from answer by @Roeffus

This is indeed a bit of an annoying problem. For python 2.x.x you use:

cv2.CV_FONT_HERSHEY_SIMPLEX and for Python 3.x.x:

cv2.FONT_HERSHEY_SIMPLEX

For more see this http://www.programcreek.com/python/example/83399/cv2.putText

Upvotes: 1

Roeffus
Roeffus

Reputation: 125

This is indeed a bit of an annoying problem. For python 2.x.x you use:

cv2.CV_FONT_HERSHEY_SIMPLEX

and for Python 3.x.x:

cv2.FONT_HERSHEY_SIMPLEX

I recommend using a autocomplete environment(pyscripter or scipy for example). If you lookup example code, make sure they use the same version of Python(if they don't make sure you change the code).

Upvotes: 11

Andenthal
Andenthal

Reputation: 869

Was CV_FONT_HERSHEY_SIMPLEX in cv(1)? Here's all I have available for cv2 "FONT":

FONT_HERSHEY_COMPLEX
FONT_HERSHEY_COMPLEX_SMALL
FONT_HERSHEY_DUPLEX
FONT_HERSHEY_PLAIN
FONT_HERSHEY_SCRIPT_COMPLEX
FONT_HERSHEY_SCRIPT_SIMPLEX
FONT_HERSHEY_SIMPLEX
FONT_HERSHEY_TRIPLEX
FONT_ITALIC

Dropping the 'CV_' seems to work for me.

cv2.putText(image,"Hello World!!!", (x,y), cv2.FONT_HERSHEY_SIMPLEX, 2, 255)

Upvotes: 50

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