TIOParams.RAW_EmbeddedJpegLoading
TIOParams.RAW_EmbeddedJpegLoading
Declaration
property RAW_EmbeddedJpegLoading: TIERAWEmbeddedJpegLoading;
Description
Specifies the method that is used to load the embedded JPEG when
RAW_GetEmbeddedJpeg = True.
Value | Description |
ierlDefault | The embedded JPEG is loaded at the default size |
ierlWIC | Uses the TIEWICReader to load the JPEG at its default size |
ierlScaled | Loading of the embedded JPEG is speeded up by loading a scaled (smaller) version of the image (as with JPEG_Scale. The image is guaranteed to be no smaller than RAW_EmbeddedJpegMinWidth x RAW_EmbeddedJpegMinHeight |
Generally ierlScaled will give the best performance.
Default: ierlDefault (Specified by
IOParamDefaults)
| Demos\InputOutput\CameraRaw\CameraRaw.dpr |
| Demos\InputOutput\IEViewPerformance\Performance.dpr |
Raw Loading Speed
ImageEn offers four properties to improve loading speed for RAW images:
◼RAW_GetExifThumbnail◼RAW_GetEmbeddedJpeg◼RAW_EmbeddedJpegLoading◼RAW_HalfSizePerformance Testing
// Testing loading of 100 raw images of various types:
IEGlobalSettings().CameraRawEngine := ieenDLL;
ImageEnView1.IO.Params.RAW_GetExifThumbnail := loadExif;
ImageEnView1.IO.Params.RAW_GetEmbeddedJpeg := loadJpeg or loadExif;
ImageEnView1.IO.Params.RAW_EmbeddedJpegLoading := jpegMethod;
ImageEnView1.IO.Params.RAW_EmbeddedJpegMinWidth := 200;
ImageEnView1.IO.Params.RAW_EmbeddedJpegMinHeight := 200;
ImageEnView1.IO.Params.RAW_HalfSize := loadHalf or loadJpeg or loadExif;
t := GetTickCount;
for i := 0 to ss.Count - 1 do
ImageEnView1.IO.LoadFromFile( ss[i] );
memo1.Lines.Add('Load: ' + FloatToStr( GetTickCount - t / 1000 ));
Load Method | Load Method | Time |
RAW_GetExifThumbnail | loadExif=True | 1.6 ms |
RAW_GetEmbeddedJpeg (Scaled) | loadJpeg=True, jpegMethod=ierScaled | 1.7 ms |
RAW_GetEmbeddedJpeg (WIC) | loadJpeg=True, jpegMethod=ierWIC | 2.1 ms |
RAW_GetEmbeddedJpeg (Default) | loadJpeg=True, jpegMethod=ierDefault | 2.9 ms |
RAW_HalfSize | loadHalf = True | 8.6 ms |
Normal | - | 19.4 ms |
// Fastest loading of a RAW image at no smaller than 800x600
ImageEnView1.IO.Params.RAW_GetEmbeddedJpeg := True;
ImageEnView1.IO.Params.RAW_EmbeddedJpegMinWidth := 800;
ImageEnView1.IO.Params.RAW_EmbeddedJpegMinHeight := 600;
ImageEnView1.IO.Params.RAW_EmbeddedJpegLoading := ierlScaled;
ImageEnView1.IO.LoadFromFile('C:\CRW_0001.CRW');
See Also
◼OptimizeLoadingParams◼RAW_EmbeddedJpegMinWidth◼RAW_EmbeddedJpegMinHeight