///////////////////////////////////////////
temp: TMemoryStream;
jpeg: TJpegImage
////////////////////////////////////////////
temp:= TMemoryStream.Create;
jpeg := TJpegImage.Create;
idhttp2.Get('http://ya.ru/logo.jpg', temp);
temp.Position:=0;
jpeg.LoadFromStream(temp);
image1.Picture.Graphic:= jpeg;
jpeg.Free;
temp.Free;