Image manipulation using Arrays - English

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Python 3.4.3 Tutorials - English

Questions posted on ST Forums:

What we are doing by slicing the red channel of the image's array
What we are doing by slicing the red channel of the image's array? I see no difference only white colour is changed to purple colour or violet colour. Please explain this professor.
07-08M 40-50S unanswered sc256356

Question posted on: July 9, 2023, 10:06 p.m.
imshow() vs show()
what is the difference between plt.imshow() and plt.show() ? why do we need to use both to display the image?.
04-05M 30-40S AL

Answer last updated on: July 18, 2023, 5:57 p.m.
Changing the color of the border
How to change the color of the border of an image?
06-07M 20-30S HITESH_NINAMA

Answer last updated on: Jan. 19, 2022, 1:09 p.m.
to obtain the square in the centre of the image squares.png with size 150*150
since the index value starts from zero which is correctimg[74:225,75:225] orimg[75:225,75:225]
05-06M 20-30S KAVYA_30

Answer last updated on: June 24, 2021, 4:38 p.m.
Regarding image manipulation
What is the meaning of the value 2 or 4 in the below functions:-plt.imshow(img[::2,::2])plt.imshow(img[::4,::4])
05-06M 50-60S Mann_19

Answer last updated on: July 14, 2020, 9:01 a.m.
Regarding to read img from home directory
Sir, when I run command G = plt.imread('squares.png') I get error that no such file or directoryWhile I already downloaded it in home directory
09-10M 50-60S Mukulgoswami340@gmail.com

Answer last updated on: July 8, 2020, 6:11 p.m.
Create CSV File
RGB Examples?How to read images into arrays?How to check the dimensions of an array?Example to access parts of an image How to stride over an array?
03-04M 10-20S SrinathNV

Answer last updated on: May 31, 2020, 11:05 a.m.
Image manipulations?
How to apply image manipulations functions on other formats of image like .jpeg, bmp etc
07-08M 20-30S balajeemaram

Answer last updated on: June 22, 2019, 12:58 p.m.

Outline:

Read images into arrays How to access parts of an array? imread command imshow command show command How to check the dimensions of an array? Example to access parts of an image How to stride over an array? Example to access an RGB image Slice an image of different dimension