清空筛选条件
清空筛选条件

Save image with same resolution

5 次查看（过去 30 天）
HAINGKHARRAN GUNASEKARAN
评论： Walter Roberson 2021-6-16
Hello, I've drawn some circles on an image and i wish to save that image...Though the image was saved with imwrite() command, the image became blur (the resolution reduced). How can I save the image without its quality reduced?
The coding used is as follows:
%Risk Contour
I = imread('Plant latest layout.jpg') ;
imshow(I)
th = linspace(0,2*pi) ;
hold on
message = sprintf('Click where you want the center to be');
uiwait(helpdlg(message));
[xCenter, yCenter] = ginput(1);
for radius =Y
x = radius * cos(th) + xCenter;
y = radius * sin(th) + yCenter;
plot(x, y, '-');
end
hold off
imwrite(F.cdata,'Plant latest layout.jpg') %Save the contour drawn
  4 个评论
显示 2更早的评论
HAINGKHARRAN GUNASEKARAN
HAINGKHARRAN GUNASEKARAN 2021-6-16
Yeah, i missed that line here....Thee problem is the image quality ..
Walter Roberson
Walter Roberson 2021-6-16
In my brief test, I am not observing any reduction in image quality, under the conditions:
  • that the original image fit within the screen without reduction
  • that the "blur" being talked about is not the fact that you cannot get sharp edges when you use .jpg (unless you turn the quality up a lot). JPEG is nice for scenes, but not good for preserving edges.
After you do the imshow(), ask
disp(size(I))
ax = gca;
oldunits = ax.Units;
ax.Units = 'pixels';
axpos = ax.InnerPosition;
ax.Units = oldunits;
disp(axpos(3:4))
and then after the getframe, ask
disp(size(F.cdata))
and tell us what show up.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Image Quality 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by