imwrite function

2012 4 3
2 个回答
回答已采纳
3 次查看（30 天）

0 个投票

I'm facing the problem that when I save my modified image by using imwrite function, the resultant image has different pixel values. How to save an image without affecting it's pixels?

请先登录，再回答此问题。

 采纳的回答

Ashish Uthama
Ashish Uthama 2012-4-4

1 个投票

Your previous comment specified that the file format you are using is JPEG.
JPEG uses lossy compression, so you cannot expect the written values to be the same as the in-memory array.
Try writing to an uncompressed/lossless compression format like PNG or BMP.

更多回答（1 个）

Walter Roberson
Walter Roberson 2012-4-3

0 个投票

What datatype is your image, and what value range is the data you are saving, and what value range is the saved image when it is read back in? Also, which image format are you saving as?

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Sneha
Sneha 2012-4-4
im modifying a rgb image.It changes the pixel value of the part that i have modified.for eg..one of the modified pixels before imwrite has value[68,131,127],but after imwrite that same pixel has value[110 121 113].
im taking the image in JPEG format and also saving it in jpeg in imwrite.

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Read, Write, and Modify Image 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