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Errors about JPEG encoder work with 8-bit gray scale image on TMS320C6678, please help me

Other Parts Discussed in Thread: TMS320C6678

hello everyone,

I have worked on JPEG encode for 8-bit scale image running on TMS320C6678, but some errors confused me.

The codec which I used is C66x_jpegenc_02_02_00_01_ELF.exe

The userguide shows it can encode grayscale image

but when I config it to encode grayscale image, the result is not correct, the following images show the problem

figure 1, is the TestVecs.cfg of image1

figure 2 is the Testparamsof image1

figure3 is the orignal image1

figure4 is the encoded image1

   figure1

figure 2

figure 3

figure4

as the same,

figure 5, is the TestVecs.cfg of image2

figure 6 is the Testparamsof image2

figure7 is the orignal image2

figure8 is the encoded image2

figure 5

figure 6

fiugre 7

figure 8

Images are recoreded by mobile phone, so it may not clear.

I am wonder, Where is my wrong, I didn't change any code in the example project.

it is appreciated if anyone could help me

best regards,

sworder