在我的程序中,用戶可以上傳特定尺寸的圖像,然後我調整圖像大小。如果圖像很大,它效果很好,但是如果圖像很小,我嘗試調整大圖像變得模糊(基本上它只是縮放而不是調整大小)...有人可以幫我怎麼做。謝謝!無法將小圖像調整爲較大圖像
這裏是我的程序
public static Image ScaleBySize(Image imgPhoto, int size)
{
int logoSize = size;
float sourceWidth = imgPhoto.Width;
float sourceHeight = imgPhoto.Height;
float destHeight = 0;
float destWidth = 0;
int sourceX = 0;
int sourceY = 0;
int destX = 0;
int destY = 0;
if (sourceWidth > size || sourceWidth < size) { destWidth = size; }
if (sourceHeight > size || sourceHeight < size) { destHeight = size; }
Bitmap bmPhoto = new Bitmap((int)destWidth, (int)destHeight,PixelFormat.Format32bppPArgb);
bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
Graphics grPhoto = Graphics.FromImage(bmPhoto);
grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;
grPhoto.DrawImage(imgPhoto,new Rectangle(destX, destY, (int)destWidth, (int)destHeight),new Rectangle(sourceX, sourceY, (int)sourceWidth, (int)sourceHeight),GraphicsUnit.Pixel);
grPhoto.Dispose();
return bmPhoto;
}
你最好的選擇是讓圖像尺寸小於你所需的尺寸。只調整大小以消除失真 – Tommy