How to replace image pixels

37 Ansichten (letzte 30 Tage)
sejugn jung
sejugn jung am 5 Aug. 2019
Beantwortet: Image Analyst am 5 Aug. 2019
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
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.

Melden Sie sich an, um zu kommentieren.

Antworten (1)

Image Analyst
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

Kategorien

Mehr zu Get Started with Image Processing Toolbox finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by