Re-ID done right: towards good practices for person re-identification

Training a deep architecture using a ranking loss has become standard for the person re-identification task. Increasingly, these deep architectures include additional components that leverage part detections, attribute predictions, pose estimators and other auxiliary information, in order to more effectively localize and align discriminative image regions. In this paper we adopt a different approach and carefully design each component of a simple deep architecture and, critically, the strategy for training it effectively for person re-identification. We extensively evaluate each design choice, leading to a list of good practices for person re-identification. By following these practices, our approach outperforms the state of the art, including more complex methods with auxiliary components, by large margins on four benchmark datasets. We also provide a qualitative analysis of our trained representation which indicates that, while compact, it is able to capture information from localized and discriminative regions, in a manner akin to an implicit attention mechanism

GISH and FISH using rye genomic DNA (red), Oligo-pSc119.2-1 (green) and Oligo-pTa535-1 (red) as probes on lines 12FT1290 and 12FT1378.

<p><b>A</b> GISH and FISH pattern of line 12FT1290. <b>B</b> GISH and FISH pattern of line 12FT1378. <b>C</b> Cut-out chromosomes for the comparison between normal and changed wheat chromosomes. The changed wheat chromosomes are marked by red letters in A and B. Chromosomes were counterstained with DAPI (blue). Bars = 10 µm.</p

FISH analysis of ‘Mianyang11’ and ‘Chuannong27’ using Oligo-pSc119.2-1 (green) and Oligo-pTa535-1 (red) as probes.

<p><b>A</b> FISH pattern of ‘Mianyang11’. <b>B</b> FISH pattern of ‘Chuannong27’. The chromosomes, which were involved in structural alterations in this study, are marked. Chromosomes were counterstained with DAPI (blue). Bars = 10 µm.</p

GISH and FISH using rye genomic DNA (red), Oligo-pSc119.2-1 (green) and Oligo-pTa535-1 (red) as probes on progeny of line 12FT1290.

<p><b>A</b> GISH and FISH pattern of line 13FT294-18, representing lines with two changed 5A chromosomes and one changed 7D chromosome. <b>B</b> GISH and FISH pattern of line 13FT294-15, representing lines with two changed 5A chromosomes and two changed 7D chromosomes. <b>C</b> GISH and FISH pattern of line 13FT294-9, representing lines with two changed 5A chromosomes and normal 7D chromosomes. No rye chromosome(s) are detected in lines 13FT294-18 and 13FT294-9. The changed wheat chromosomes are marked by red letters. Chromosomes were counterstained with DAPI (blue). Bars = 10 µm.</p

GISH and FISH using rye genomic DNA (red), Oligo-pSc119.2-1 (green) and Oligo-pTa535-1 (red) as probes on line 12FT1844 and its progeny.

<p><b>A</b> GISH and FISH pattern of line 12FT1844. <b>B</b> GISH and FISH pattern of line 13FT268-25, representing lines with one changed 5A chromosome. <b>C</b> GISH and FISH pattern of line 13FT268-26, representing lines with two changed 5A chromosomes. <b>D</b> GISH and FISH pattern of line 13FT268-9, representing lines with normal 5A chromosomes. <b>E</b> GISH and FISH pattern of line 13FT268-23. <b>F</b> Cut-out chromosomes for the comparison between normal and changed wheat chromosomes. Changed wheat chromosomes are marked by red letters in B, C and E. Chromosomes were counterstained with DAPI (blue). Bars = 10 µm.</p

GISH and FISH using rye genomic DNA (red), Oligo-pSc119.2-1 (green) and Oligo-pTa535-1 (red) as probes on lines 1-6-7B-2 and 12FT2149.

<p><b>A</b> GISH and FISH pattern of line 1-6-7B-2. <b>B</b> Line 12FT2149 contains no rye chromosome and changed wheat chromosomes (marked by red letters). <b>C</b> Cut-out chromosomes for the comparison between normal and changed wheat chromosomes. Chromosomes were counterstained with DAPI (blue). Bars = 10 µm.</p

The sequences of SSR markers which were specific for 1RS chromosome.

<p>The sequences of SSR markers which were specific for 1RS chromosome.</p

FISH of root tip chromosomes in wheat-rye translocation and substitution lines which originated from MY11 x Aigan rye.

<p>The arrows indicate wheat-rye translocated chromosomes or 1R substituted chromosomes. A. RT1249; B. RT1163-4; C. RT1217-1; D. RS1200-3.</p

PCR results of primer TNAC1021.

<p>Lane 1 = MY11; lane 2 = water; lane 3 = RS1200-3; lane 4 = RT1249; lane 5 = RT1217-1; lane 6 = RT1163-4; lane 7 = CN11; lane M = marker.</p

PCR result of primer PrCEN-2.

<p>Lane 1 = RT1249; lane 2 = RT1217-1; lane 3 = RT1163-4; lane 4 = RS1200-3; lane 5 = Aigan rye; lane 6 = MY11; lane M = marker.</p