Embedded Files
Setting of BMP image of GIMP
Setting of BMP image of GIMP
Options will appear when saving BMP images. Please select "24 bits" or "32 bit".
Check the replaced block
Check the replaced block
Operate the pull-down box according to the following image in Step-3. The color of the replaced block changes in the output JPEG image. Specify when you want to know which block was replaced. Select "none" if you want normal output.
Quality 100
Quality 100
In step-3, check the [Quality 100] to recompress the retouched part with the image quality 100. The image quality of unretouched parts will not change. Looking at the difference image, the difference around characters "Test" is considerably less. However, the image size will be larger.
Retouched JPEG (jpegcoll quality 100)
Difference (jpegcoll quality 100)
CUI
CUI
You can run the tool from the command line.
- How to execute Step-1
jpegcoll -decode original.jpg output.bmp- How to execute Step-3
jpegcoll -merge original.jpg retouched.bmp output.jpgIf Jpegcoll is executed with some arguments as follows, a simple help is displayed when using from the command line.
jpegcoll helpjpegcoll ?If executed without arguments, it will start up with the normal GUI.
When you want to crop JPEG image
When you want to crop JPEG image
Jpegcoll does not support cropping JPEG images.
Crop can be done with Jpegcrop tool. Official website of Jpegcrop is here.
By default Jpegcrop will output JPEG images in a format that can not be seen with many browsers and album applications. You can set the Entropy Coding Method from [File] -> [Settings]. It is recommended to set it [Huffman default] or [Huffman optimized].
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