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Image to Black & white converter converts your color pixel images to grayscale where it changed from a colorful image to a black & white image. You just have to open and upload photo you wanna change and press the convert button. This converter changes images maintaining a high quality and pixel resolution of images.
RGB to grayscale image conversion online:
Gray RGB color code has equal red,green and blue values:
R = G = B
For each image pixel with red, green and blue values of (R,G,B):
R' = G' = B' = (R+G+B) / 3 = 0.333R + 0.333G + 0.333B
This formula can be changed with different weights for each R/G/B value.
R' = G' = B' = 0.2126R + 0.7152G + 0.0722B
R' = G' = B' = 0.299R + 0.587G + 0.114B
Pixel with RGB values of (30,128,255)
The red level R=30.
The green level G=128.
The blue level B=255.
R' = G' = B' = (R+G+B) / 3 = (30+128+255) / 3 = 138
so the pixel will get RGB values of:
Colourful images are actually the combination of three basic coloured pixels which are Red, Green & Blue(RGB). The different coloured images have different RGB values depending on the number of respective colours. While the grayscale ( black & white ) images have an equal amount and RGB score of each basic colour.
For example, if a cloured picture has 40 pixels red, 50 pixels green and 60 pixels blue colours then this converter will add pixels of all three colours and divide it by 3 to get the mean value that is 50. Now, this converter will convert and distribute an equal RGB score of 50 for each colour to get a Grayscale i.e Black & White image.
Change a picture to grayscale or to black-and-white
1. Right-click the picture that you want to change, and then click Format Picture on the shortcut menu.
2. Click the Picture tab.
3. Under Image control, in the Color list, click Grayscale or Black and White.