如何在图像大小调整上防止此色彩偏移？

Question

使用ImageResizer进行大小调整时，我遇到了某种图像色移的问题

http://khovexternalstorage.blob.core.windows.net/sitefinityexternalstoraage/images/default-source/external/nj/77-hudson/1.3-community-thumbnail-images/77-hudson_jersey-city_nj_exterior1.jpg

当调整图像大小时，明亮的蓝天，变得黑暗和沉闷的样子。我没有注意到所有图像的这种转变，但这个样本很明显。

http://khovimagedemo.cloudapp.net/azure/sitefinityexternalstoraage/images/default-source/external/nj/77-hudson/1.3-community-thumbnail-images/77-hudson_jersey-city_nj_exterior1.jpg?width=450

http://khovimagedemo.cloudapp.net/azure/sitefinityexternalstoraage/images/default-source/external/nj/77-hudson/1.3-community-thumbnail-images/77-hudson_jersey-city_nj_exterior1.jpg?width=800

提前致谢。