How to replace image pixels
13 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
I have an image and a csv file. I want to change the pixel value of the image to the values in the csv file. How do I do that?
1 Kommentar
Adam
am 5 Aug. 2019
Load the image, load the csv file, index into the image and replace values. Write the image to file again if desired.
Antworten (1)
Image Analyst
am 5 Aug. 2019
Try this if your data is stored row, column, new gray level:
data = csvread(filename); % Assumes columns of row, column, new gray level, NOT x, y, new gray level
rows = data(:, 1);
columns = data(:, 2);
newValues = data(:, 3);
for k = 1 : length(rows)
grayImage(rows(k), columns(k)) = newValues(k); % Replace this pixel of grayImage with a new value.
end
If your data is in the form x, y, gray level, you need to do this:
data = csvread(filename); % Assumes columns of x, y, new gray level, NOT row, column, new gray level
rows = data(:, 2);
columns = data(:, 1);
newValues = data(:, 3);
for k = 1 : length(rows)
grayImage(rows(k), columns(k)) = newValues(k); % Replace this pixel of grayImage with a new value.
end
0 Kommentare
Siehe auch
Kategorien
Mehr zu Get Started with Image Processing Toolbox finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!