MATLAB Answers

0

convert image to bitmap map image without using for loop

Elysi Cochin さんによって質問されました 2019 年 2 月 16 日
最新アクティビティ Elysi Cochin さんによって 編集されました 2019 年 2 月 17 日
Partition an image into 4 × 4 pixel blocks and
compute average for the block
N1 = N2 = 4
xi = ith pixel
now replace the values to 1 and zero to create a bitmap image.
Without using for loop, how can i write these 2 equations in simple code

  0 件のコメント

サインイン to comment.

1 件の回答

Image Analyst
回答者: Image Analyst
2019 年 2 月 16 日
編集済み: Image Analyst
2019 年 2 月 16 日
 採用された回答

Try this:
% Compute mean in 4-by-4 blocks
% kernel = ones(4);
meanImage = conv2(double(grayImage), kernel, 'same') / numel(kernel);
% Compare actual image to mean image.
binaryImage = grayImage >= meanImage;
There will be some errors at the edge of the image where the window does not fit onto the image, like it's only 4 by 3 or whatever. If this is important, then you can use conv2 twice, once to sum the image and once to count the pixels, then divide the gray level sum image from the pixel count image. But usually edge effects are not worth worrying about because they get removed later in the process naturally.

  0 件のコメント

サインイン to comment.



Translated by