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2. Creating a simple black image with opencv using cvcreateimage

   stackoverflow.com/questions/17984419

   2. For Python: import numpy as np. X_DIMENSION = 288. Y_DIMENSION = 382. black_image = np.zeros((X_DIMENSION, Y_DIMENSION)) With this code you generate a numpy array which is what is expected for opencv images and fill it with zero which is the color for black. This code is made for grayscale images.

3. create a black image with specified size, depth, channels with...

   stackoverflow.com/questions/40901906

   I want to create a black image with cv2 module in opencv. Python is prefered. It seems I should use numpy to do it but I do not know how to do it.

4. Image.fromarray just produces black image - Stack Overflow

   stackoverflow.com/questions/47290668

   Image.fromarray is poorly defined with floating-point input; it's not well documented but the function assumes the input is laid-out as unsigned 8-bit integers. To produce the output you're trying to get, multiply by 255 and convert to uint8: z = (z * 255).astype(np.uint8) The reason it seems to work with the random array is that the bytes in ...

5. OpenCV2 imwrite is writing a black image - Stack Overflow

   stackoverflow.com/questions/54165365

   You have to pass an image composed of values in the range [0, 255]. In your case, you are passing values that are all close to zero and "far" away from 255. Hence, the image is assumed as colorless and therefore black. A quick fix might be: cv2.imwrite("dogey.jpg", 255*output) answered Jan 13, 2019 at 2:15.

6. Using PIL to turn a RGB image into a pure black and white image

   stackoverflow.com/questions/9506841

   But you can do this using simple vectorization which will run much faster than the for loop that is used in that answer. The code below converts the pixels of an image into 0 (black) and 1 (white). from PIL import Image. import numpy as np. import matplotlib.pyplot as plt. #Pixels higher than this will be 1.

7. Create a new RGB OpenCV image using Python? - Stack Overflow

   stackoverflow.com/questions/12881926

   import cv2 # Not actually necessary if you just want to create an image. import numpy as np blank_image = np.zeros((height,width,3), np.uint8) This initialises an RGB-image that is just black. Now, for example, if you wanted to set the left half of the image to blue and the right half to green , you could do so easily:

8. html - Change color of PNG image via CSS? - Stack Overflow

   stackoverflow.com/questions/7415872

   CSS filter generator to convert from black to target hex color. for example i needed my png to have the following color #1a9790. then you have to apply the following filter to you png. filter: invert(48%) sepia(13%) saturate(3207%) hue-rotate(130deg) brightness(95%) contrast(80%);

9. How can I create an empty n*m PNG file in Python?

   stackoverflow.com/questions/12760389

   You can use the method PIL.Image.new() to create the image. But the default color is in black. To make a totally white-background empty image, you can initialize it with the code: from PIL import Image img = Image.new("RGB", (800, 1280), (255, 255, 255)) img.save("image.png", "PNG") It creates an image with the size 800x1280 with white background.

10. My camera takes black pictures. How do I fix it?

    www.ifixit.com/Answers/View/36871

    A stuck shutter is a common failure mode for digital cameras. The symptoms of a stuck or "sticky" shutter are very similar to CCD image sensor failure. The camera may take black pictures (for shutter stuck closed), or the pictures may be very bright and overexposed, sometimes with lines, especially when taken outdoors (for shutter stuck open).

11. html - Blank image encoded as data-uri - Stack Overflow

    stackoverflow.com/questions/9126105

    46. If you need a transparent image 1x1 pixel, just set this data uri as src default attribute (keep the /// parts, it encodes byte 255, not a comment). This is instead a base64 encoding for an image 1x1 white. Otherwise you could set data:null and save ~60 extra bytes for each image.