How to do film dosimetry?

4 次查看（过去 30 天）
omid baziar
omid baziar 2016-9-14
编辑： Image Analyst 2024-8-28
Which command is used most often for film dosimetry, with separate RGB channels in MATLAB?

请先登录，再回答此问题。

回答（3 个）

ANKUR MOURYA
ANKUR MOURYA 2017-6-12
移动：Image Analyst 2024-8-28
if a is image then to extract red channel use command b=a(:,:,1);
Yash
Yash 2024-8-28
Hi Omid,
To work with separate RGB channels in film dosimerty, the "imread" function is commonly used to read images, and "im2double" is used to convert them to a double precision format for analysis. The RGB channels can be separated using indexing. Here's a basic example:
% Read the image
img = imread('film_image.png');
% Convert to double for processing
img = im2double(img);
% Separate RGB channels
redChannel = img(:,:,1);
greenChannel = img(:,:,2);
blueChannel = img(:,:,3);
% Example processing on each channel
% For demonstration, let's just display histograms of each channel
figure;
subplot(3,1,1);
imhist(redChannel);
title('Red Channel Histogram');
subplot(3,1,2);
imhist(greenChannel);
title('Green Channel Histogram');
subplot(3,1,3);
imhist(blueChannel);
title('Blue Channel Histogram');
For film dosimetry, you might also be interested in functions like imshow for displaying images, and rgb2gray if you need to convert RGB images to grayscale, though typically, analysis is done on individual channels.Relevant Links
Here are some resources that might be useful for further exploration:
  1. Image Processing Toolbox: https://www.mathworks.com/help/images/
  2. Image Processing and Computer Vision: https://www.mathworks.com/solutions/image-video-processing.html
  3. imread: https://www.mathworks.com/help/matlab/ref/imread.html
  4. im2double: https://www.mathworks.com/help/matlab/ref/im2double.html
These resources should help you get started with film dosimetry analysis using MATLAB. If you have access to specific scientific articles or textbooks, they might also provide more detailed methodologies tailored to your needs.
Image Analyst
Image Analyst 2024-8-28
You can use imsplit to separate an RGB image into individual component images in one line of code:
% Separate RGB image into individual color channels.
[redChannel, greenChannel, blueChannel] = imsplit(rgbImage);
For film dosimetry, you will of course need to calibrate your images. For example if you're using x-rays, you can take an image of an aluminum step wedge. This will give you a transform to turn a gray scale into something meaningful and physical such as "layers of aluminum".

类别

在 Help Center 和 File Exchange 中查找有关 Image Filtering and Enhancement 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by