how can i create a ROI in image for SIFT features extraction !?

Question

messaoudi nada 2021-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/1565196-how-can-i-create-a-roi-in-image-for-sift-features-extraction

评论： messaoudi nada 2021-10-21

hello, I extracted sift features frome this img ,but i wanna just extract the features in the region of eye and mouth , so how can i eliminate the edge features using ROI

thanks in advance !

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Answer 1

yanqi liu 2021-10-18

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https://ww2.mathworks.cn/matlabcentral/answers/1565196-how-can-i-create-a-roi-in-image-for-sift-features-extraction#answer_810846

在 MATLAB Online 中打开

clc; clear all; close all;

femDetector1 = vision.CascadeObjectDetector('EyePairBig');

femDetector2 = vision.CascadeObjectDetector('Mouth','UseROI',true);

I = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/769211/image.png');

bboxes = femDetector1(I);

bboxes2 = femDetector2(I,round([1 size(I,1)*2/3 size(I,2)-1 size(I,1)/3]));

I2 = insertObjectAnnotation(I,'rectangle',bboxes,'Eye');

I2 = insertObjectAnnotation(I2,'rectangle',bboxes2,'Mouth');

figure

imshow(I2)

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messaoudi nada 2021-10-21

@yanqi liu thanks sir but i didn't ask for eye and mouh detection ,i asked for edge features elimination or are there any way to extract SIFT features in region of interest wich is eye and mouth ! that mean without features detection in edge of img

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