How to Convert BMP images to JPEG?? (Properly!!!!)

9 次查看（过去 30 天）
Cormac
Cormac 2014-1-23
评论： Cormac 2014-1-28
When I convert an image from BMP to JPEG using the code below:
BMP = imread('CYMR9_SCAP_VE_MEAS_FIB_MEASURE5_p003_2013-09-18_20-07-21.bmp','bmp');
imwrite(BMP,'CYMR9_SCAP_VE_MEAS_FIB_MEASURE5_p003_2013-09-18_20-07-21.jpg','jpg');
imageOriginal = imread('CYMR9_SCAP_VE_MEAS_FIB_MEASURE5_p003_2013-09-18_20-07-21.jpg');
it saves the image in my directory as 147KB. However when I open the original image in it's BMP format in Paint and save it manually as a JPEG it saves as the size 386KB!
I'm working with a function based around automated image processing and would prefer Matlab to convert the initial image to the size 386Kb (similar to manual conversion using paint) as when it's at the size 147KB my function doesn't work.
could anyone help solve this problem??
  2 个评论
Image Analyst
Image Analyst 2014-1-23
You don't need the second argument. It will figure out the format from the filename extension.
Cormac
Cormac 2014-1-28
I'm only seeing your comment to this question now, thanks for the tip!

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2014-1-23
Play with the 'Mode' and 'Quality' options of imwrite(). Look in the imwrite() documentation under "Name-Value Pair Arguments"
  1 个评论
Cormac
Cormac 2014-1-28
Done a second conversion to convert from a gray scale JPEG to a true colour JPEG! thanks for the help.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Convert Image Type 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