How can i make .csv data set from .png images?

I have 20 .png images, i want to convert them in .csv format.

[Walter Roberson]

What information are you hoping will be written to the csv files?

Are you wanting to emit information along the lines of

row,column,red,green,blue
1,1,255,255,255
1,2,255,255,240

and so on, giving row and column numbers and pixel components?

Are you wanting OCR to be done on the images with the csv file containing the text that was detected?

Do the PNG files contain graphs that you are hoping to digitize with the csv file containing the list of x and y points extracted from the pictures of the graphs ?

[Image Analyst]

Normally when people ask for image processing advice, they attach images. Makes sense, right? Please attach an image or two so we can see what we're dealing with.

[Md. Raihan Uddin]

[Image Analyst]

Next answer Walter's question. Or do you simply want to do

grayImage = imread('fingerprint'png');
csvwrite(filename, grayImage);

[hazal once]

How can I make its reverse? CSV to Jpeg or png

[Walter Roberson]

For csv to image file, sometimes you can just reshape() and imwrite(), but sometimes you have to do griddata() and imwrite() the result. It depends what the values in the data file represent and whether you have a grid of them or just scattered values.

Answer 1

[saddam hussain]

I have an images in jpg format how to make a csv file from this

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/387370-how-can-i-make-csv-data-set-from-png-images#comment_543901

RGBImage = imread('fingerprint.jpg');
csvwrite(filename, reshape(RGBImage, size(RGBImage,1),[]));

This "unrolls" the M x N x 3 .jpg image into a csv that stores M rows and (N*3) columns.

You might prefer other arrangements for larger images: if you were to be using the data with Excel, you would risk exceeding the maximum number of columns of .xls and .xlsx files.