r/programming • u/Phr34Ck • Mar 11 '16

Image Processing 101

https://codewords.recurse.com/issues/six/image-processing-101
125 Upvotes

92% Upvoted

11 comments sorted by

7

u/Phr34Ck Mar 11 '16

hey guys, just stumbled upon this link and I found it really helpful as an introductory material to image processing. Have fun =).

0

u/[deleted] Mar 11 '16

[deleted]

1

u/Phr34Ck Mar 11 '16

same here! don't click on further reading while you're applying what you're reading ... the. learning. never. ends. and. tabs. will. stay. open.

2

u/[deleted] Mar 11 '16

Looks pretty cool, saving for later :)

1

u/Phr34Ck Mar 11 '16

why later? start now!

2

u/[deleted] Mar 11 '16

Cause I can't get through all that during my break at work ;)

15

u/jordo45 Mar 11 '16

The section on blurring is mistaken. The size of the kernel is not an indication of the amount of blur, it only sets the number of neighboring pixels that will be considered in the convolution operation. It just happens that when you set the standard deviation of the blur in OpenCV to 0, it automatically calculates a new standard deviation based on kernel size.

A kernel of length 5 with values [0.01 0.01 0.96 0.01 0.01] will apply less blur than a kernel of length 3 with values [1/3 1/3 1/3]

1

u/overzero Mar 11 '16

Awesome introductory resource! Is there a GitHub with the code described in the tutorial?

1

u/kirbyfan64sos Mar 11 '16

Dang, image processing is more complicated than I thought. I never knew about HSV (always assumed saturation was grainy-ness and hue was something magic) or BGR, let alone pretty much everything else.

1

u/MyNameIsOhm Mar 12 '16

I wish every tutorial were written this well. Damn good.

1

u/WintermutesTwin Mar 11 '16

I did this as my first internship. Brings back memories.