Chapter 1355

Jiang Yuan examined the windbreaker evidence on site, deliberately using a horseshoe magnifier to inspect several potential fingerprints, then refreshed his mind with the newly acquired technology, and looked up saying: "I need a high-resolution spectral imaging device. Do you have one?"

The two file room officers sitting opposite him could only lift their weary eyelids in response to Jiang Yuan's inquiry, their hearts and eyes equally dazed from overtime.

Speaking was Zheng Feng, a rushing forensic technician from the technical department, who said: "The provincial bureau has a Resonon push-scan type with 5.5 nanometer resolution; I've borrowed it before." He is a "young" expert under forty.

"Does Wanwan City not have one?" Jiang Yuan persisted, trying again.

"We have high-resolution microscopes, but not high-resolution spectral imaging devices. You want to scan this coat with one, right? We can't do it; the provincial bureau's unit should work. The high-end model supposedly costs 500,000. Our city bureau simply can't afford it." Zheng Feng was very familiar with their equipment.

Accompanying him was Liu Changcheng, captain of the forensic brigade, who added more directly: "Even if we could afford it, we couldn't use it—the foreign software is extremely complex. I've used Resonon too; the images it produces differ from those of a normal camera, requiring image enhancement… Right, Jiang Director understands image enhancement…"

One couldn't tell whether he was complaining about the technology or praising Jiang Yuan.

"If it's the provincial bureau, I doubt we can borrow it today." Jiang Yuan felt slightly regretful. He had activated the system's temporary Skill 1, totaling 405 minutes—over six hours—and after use, it requires a 24-hour cooldown. Now, without the equipment, the skill is wasted.

But not using it isn't an option either; the new technology isn't easy to grasp. For LV6 fingerprint analysis alone, he handles existing fingerprints effortlessly, but using new tech to collect old fingerprints demands clarity for case use, and LV6 analysis is already sufficient.

The cost of new things is inherently higher.

Seeing this, Zheng Feng checked the time and said: "Even if someone is on duty at the provincial bureau now and we can borrow equipment, the round trip would likely reach tomorrow morning, so today it's probably unavailable."

Brigade Captain Liu Changcheng let out a dry sigh: "Even if someone is on duty at the provincial bureau, we still couldn't borrow the equipment."

The scene erupted in bitter laughter.

"Then it's a bit of a waste." Jiang Yuan was genuinely regretful. Using LV7 fingerprint analysis for ordinary identification would be overkill—absolute overkill—and a waste of a day's time.

"Are you in a hurry?" Zheng Feng asked, sounding somewhat "naive."

Liu Changcheng beside him frowned: "Jiang Director came to help us—how dare you speak like that?"

After speaking, Liu Changcheng told Jiang Yuan: "We'll organize what we have now, try to borrow the equipment from the provincial bureau early tomorrow morning, then drive back. We should arrive around noon."

This already exceeds normal procedural speed.

Jiang Yuan slightly shook his head: "If it's tomorrow noon, then it's not so urgent anymore."

After speaking, realizing others might not understand, Jiang Yuan fabricated a reason: "My current condition is fine; I can still work for about six hours. After six hours, if you ask me to do fingerprint comparison, I won't be able to—I'll likely need a big sleep. That way, we might have to wait another day to process this coat."

Jiang Yuan said while placing the clothes back into the evidence bag.

Even the old brigade captain Liu Changcheng was moved by this—what kind of spirit is this…

"Let me think of a solution!" Liu Zhuangzhen burst out of the gentle village, having just stepped through the door. His brain, well-supplied with blood from soaking his feet, instantly came up with an idea.

For the provincial bureau, he, a mere municipal criminal police detachment captain, certainly lacks sufficient influence, but this time, bringing vinegar to make dumplings with Zhang Limin—who is from the provincial bureau—means most of the fingerprints in this Wanwan fingerprint showdown aren't actually from Wanwan, so naturally we can find Zhang Limin to solve the problem.

Liu Zhuangzhen didn't care about the late hour; he just made a phone call to Zhang Limin.

Shortly after, Zhang Limin appeared in the strategy meeting room holding a large iron tub, entering and warmly saying: "Everyone, Jiang Village direct supply, Jiang family special—roasted bull eyes have arrived, deng deng…"

Such a high-ranking official, appearing with his own sound effects, naturally drew rounds of applause.

As long as one isn't particularly fearful, they came forward, very gracious, to take the roasted bull eyes. Meanwhile, everyone also noticed roasted beef skewers in the tub, so some simply took the skewers instead of the bull eyes—still saving face.

Zhang Limin cheerfully offered food to everyone, then handed Jiang Yuan a string of bull eyes, smiling: "Try it—made according to Elder Jiang Mr.'s guidance. As for the high-resolution spectral imaging device, I've called the bureau; they're already bringing the equipment and personnel over, speeding up—should arrive in two to three hours."

"Ah, you've managed it." Jiang Yuan was somewhat surprised, and couldn't help but add an honorific "you."

Zhang Limin nodded smilingly: "Trivial matter—using an instrument is something we overlooked. Going forward, if you have any requests, just raise them directly; we'll fulfill what we can. Even if the bureau lacks equipment, if you deem it necessary, I'll immediately contact people to procure it."

Jiang Yuan laughed heartily in thanks, then took another bite of bull eye—indeed richly fragrant and soft, like the muscle on a beef tendon, very chewy, yet completely free of muscular toughness.

"Very fragrant!" Jiang Yuan gave Zhang Limin a thumbs-up.

"Glad you like it—I'll go roast some more to test." Zhang Limin didn't keep Jiang Yuan talking, making space for him to work, and eagerly went off to roast meat. At this point, it's unclear whether it's due to work or affection.

The experts remaining in the meeting room each returned to their posts to scan fingerprints. One benefit of the fingerprint showdown is that you can work overtime freely, without family complaining about late returns, since you can choose to stay here and not go home.

Although the unit's computer cases inevitably emit a rumbling noise, everyone's hearts are very calm.

Forensic Brigade Captain Liu Changcheng carefully observed Jiang Yuan. Speaking of which, forensic pathologists are also part of the forensic brigade, but saying work is convenient…

"Bring the remains over to take a look too." Jiang Yuan then scanned all evidence related to this corpse case.

Over two hours passed in a flash.

Two dust-covered officers, accompanied by Zhang Limin, walked in carrying a huge camera.

The 500,000-yuan high-resolution spectral imaging device, in appearance, isn't even as large as a traditional camcorder—a black-red rectangular box with a camera lens protruding.

One officer quickly briefed Jiang Yuan on the device, especially the subsequent software, deliberately opening the manual and saying: "When we collect samples, we first need to complete automatic exposure measurement, adjust focus and remove dark background. For spectral imaging, the step is usually set to 1.33nm, so each sample collection yields a spectral image set of 462 images… The raw data is processed via PectrononPro software, converted into reflectance data…"

He gave a rough overview, then looked at Jiang Yuan, ready to hear his command and operate it himself.

Jiang Yuan understood, still reaching out to take the device, saying: "Let me try it first—you also help me check."

After speaking, Jiang Yuan again requested the evidence coat, laid it out on site, and began operating.

This model of high-resolution spectral imaging device is originally designed for outdoor sampling; theoretically, if a body is found on site, personnel carrying the device can conduct on-site sampling and comparison of fingerprints and other traces. This is also its simplest use.

The technician hesitated a moment, then, seeing Jiang Yuan's skilled movements, couldn't help but ask: "Have you used the same model before?"

"More or less." Jiang Yuan vaguely replied, then pulled out several fingerprints with a clattering sound.

The push-scan high-resolution spectral imaging device, as the name suggests, collects samples by pushing and scanning flat; once the equipment is debugged, it's very convenient to use.

The obtained fingerprints are then transferred to the computer, opened with PectrononPro, and see the technician looking over with an inquisitive gaze.

Jiang Yuan sat down without yielding—if this were ordinary fingerprint comparison, it would be fine, making operation easier, but the fingerprints findable on the evidence coat are just these few, and he still bears the LV7 skill; using it now makes their late-night several-hundred-kilometer run worthwhile.

Several fingerprints quickly appeared, but merely looking at them, they are severely deficient.

"Can they be used?" Li Zeming, holding a Chinese cigarette, leaned over anxiously.

"They need processing." Jiang Yuan considered and said.

"How to process?" Li Zeming asked curiously.

"HE or WT. Or BBHE and SEHE." Jiang Yuan referred to standard histogram equalization (HE) and standard wavelet transform algorithm (WT), as well as bihistogram equalization with dual histogram equalization (BBHE) and two-dimensional spatial information entropy histogram equalization (SEHE).

Li Zeming "oh"ed, seeming to understand, then turned to the two technicians: "What do you usually use?"

"Ah…… we usually…… just default to HE." The technician looked slightly flustered, expression somewhat disheveled.