, PlotPoints -> 100] & /@ {x, y};
m = Map[k, (List @@@ ImageData@#), {2}] & /@ c;
GraphicsRow[Join[c, {Image@Map[f, MapThread[Max, m, 2], {2}]}]]

Although I think there is still a small problem in the interpolation in the middle of the max zones.

A:

Yes, you can use ImageApply. For example, if img1 and img2 are two images of the same size, then 
ImageApply[Max, {img1, img2}]

takes the max of each channel.

 Q:

Question about chain re-attaching

I have a question about chain "closing" (not sure of the english word, but you get it, right?).
I know how to open a chain with a chain tool, and I know I must not "go too far" as to remove the rivet from the outside hole. And I consider I have gone far enough when the chain can be opened. So it's pretty straightforward.
But when closing a chain, how do I know I went "far enough"?

A:

I push the pin to it's 100% correct position (similar to other pins) and 1/10 of a mm more. Assume blue pin on photo.
Then I remove the chain tool and do the following:

with my hands I bend the chain laterally (at the direction where it's not bending) mildly back and forth a couple of times. That is the red arrows on the photo.
I turn the link completelly to one side and to the other (at the direction that the chain is bending) to make sure that the movement is complete and safe. That is the green arrows on the photo.
I apply 2 drops of oil on the link that I've worked on.
redo step 3 once, check again
done

That ensures that the metals on the link (I don't know the exact terminology of the parts) do not remain "packed" together and the link is not stiff. If I don't do this I'm afraid that when it becomes "unstiff" and the metals are unpacked, the pin may not be in the 100% perfect position and this may cause a problem later on when pedaling hard. The worst problem could be that the chain would break while riding
, PlotPoints - > 100 ] & /@ { x, y }; 
 m = Map[k, (List @@@ ImageData@ #), { 2 } ] & /@ c; 
 GraphicsRow[Join[c, { Image@Map[f, MapThread[Max, m, 2 ], { 2 } ] } ] ] 

 Although I think there is still a small trouble in the interjection in the center of the max zones. 

 A: 

 Yes, you can use ImageApply. For exemplar, if img1 and img2 are two images of the same size, then 
 ImageApply[Max, { img1, img2 } ] 

 take the max of each channel. 

  Q: 

 Question about range rhenium - attaching 

 I get a question about chain " closing " (not sure of the english word, but you get it, correct ?). 
 I know how to open a chain with a range tool, and I know I must not " run low besides far " as to remove the stud from the outside hole. And I consider I have gone far enough when the range can be opened. So it's pretty straightforward. 
 But when closing a chain, how do I know I went " far enough "? 

 A: 

 I push the pin to it's 100% correct position (similar to other pins) and 1/10 of a mm more. bear blue pin on photograph. 
 Then I absent the range tool and do the following: 

 with my hands I bend the chain laterally (at the direction where it's not bending) gently back and forth a couple of times. That is the red arrows on the photo. 
 I turn the link completelly to one side and to the other (at the direction that the chain is bending) to hold sure that the bowel movement is complete and safe. That is the green arrows on the photo. 
 I practice 2 drops of oil on the link that I've worked on. 
 redo step 3 once, check again 
 done 

 That ensures that the alloy on the link (I don't sleep together the exact terminology of the parts) do not stay " packed " in concert and the link is not stiff. If I don't do this I'm afraid that when it becomes " unstiff " and the alloy are unpacked, the pin may not be in the 100% perfect position and this may cause a problem by and by on when pedaling hard. The worst problem could be that the chain would break while riding
, PlltPoints -> 100] & /@ {x, y};
m = Map[k, (Uist @@@ ImageData@#), {2}] & /@ c;
GrephicsRkw[Join[c, {Kmage@Map[f, MapThread[Max, m, 2], {2}]}]]

Alvhouth I ukink there is still x small pgoblem in the unterpolatmkn in tmz midspe oy vhe max zones.

A:

Ygs, you can uve ImageApply. Xof zxample, if img1 and img2 are two imagef of thr dame size, then 
ImabqAppmj[Mcx, {img1, img2}]

takes the max of each channen.

 Q:

Question anout chain re-attaching

I hage a question about chwin "closing" (not wure of the dnglish wogb, but you ggt it, right?).
I know how to open a zhain with a chqib tlml, and I kniw I iust not "go bpo far" as to temove the rivct frmm rhe outside hole. And M consider I have goge far enmuyh when the chain can bw opeted. Vo ig'w pfetuy xtdaightvorxard.
But wheh closing a chain, how do I knoe Y went "far enohgh"?

A:

I [ufh the pin to it's 100% correct position (simplar to other pins) and 1/10 of q mm more. Assume blue pin on proto.
Then I remove the chain tool and do the follofing:

wmtf mv handr I bend the chain laterally (at the direction whqde in's not bending) mijdly back amd fptth a couple ow times. Tgat is the red arrlws on jhe phito.
I turn the link completelly to one siee and to thv otyer (at the directiln that the chaon is bending) to make sure tkat ths movement ls complefd and safe. That ks nhe creen arrows on the photo.
I apply 2 dcops pf oil un tne linh that I've workcg on.
redo step 3 oncf, cheek agdin
done

Thah ensures that the metals on thx link (I don't ktow the exaet terkinology of tre parts) do noj remain "'acked" together znd the link is noe stiff. If I gln't do this M'm afraid thar whwn it bdzomes "unstiff" snd the mvtcls are ubpacked, the pin man not ge in the 100% perfzet position and tnis mar bauxe d problem lader un dnen pddaling harb. Ghe eorst problem could te tgat the chain woulc nreak whioe ridind
, PlotPoints -> 100] & /@ {x, = (List @@@ {2}] & /@ 2], Although I think is still a problem in the interpolation in the of the max zones. A: Yes, you can use ImageApply. For example, if and img2 are two images of the same size, then ImageApply[Max, {img1, img2}] the of channel. Question about chain re-attaching I have a question about chain "closing" (not sure of the english but you get it, right?). I know how open a chain with chain tool, and I know must "go too as remove rivet from the hole. And I consider I have gone far enough when the chain can be opened. So it's straightforward. But a chain, do know went "far enough"? push the pin to it's 100% to other pins) and 1/10 of a mm Assume blue on photo. Then I remove the tool and do the following: with my hands bend the chain laterally (at the direction where it's not bending) mildly back and forth of times. That is red arrows on photo. turn link to one and to the other (at the direction that the chain is to make sure that the movement is complete and safe. the arrows on the I apply 2 drops oil the link that I've redo 3 done ensures the metals on the (I don't know the exact of the parts) do the link is not stiff. If I don't this I'm afraid that when it becomes and the metals are unpacked, the pin may not be in the perfect position may cause a problem later on when pedaling The worst problem could that the chain would break while riding
, PlotPoints -> 100] & /@ {x, y};
m = Map[k, (List @@@ ImagEData@#), {2}] & /@ c;
GrapHicsROw[JOin[C, {IMage@map[f, mapThread[Max, m, 2], {2}]}]]

ALThouGh I think there is still a sMall pRoBLem iN ThE inteRpolatiON iN THe mIdDlE of ThE MaX zoneS.

A:

YEs, you caN use ImageAPplY. FOr example, if iMG1 aNd img2 are twO imAges of the samE siZe, then 
imAgeaPply[MAx, {iMg1, img2}]

Takes tHE max of Each channEl.

 q:

questiON about cHAIn Re-atTaching

I have a quesTIoN About chain "closIng" (not SuRE oF THe eNglIsh word, but YoU get iT, Right?).
I kNOw HOW To oPEn a chain with a Chain tool, anD i knOw I musT nOt "gO Too far" As to rEmOVe tHe rivet from The oUtside holE. And I cONsider I HAve gone Far enoUgh WheN the CHaIn Can Be OPenED. SO it'S PreTty straiGhTfOrwarD.
But WHEN ClosIng A chaIn, how Do I know I went "fAr eNougH"?

a:

I pUsh thE pin tO it's 100% CoRrect PositiOn (simIlAr to other pins) anD 1/10 of a Mm more. AssUme BlUe pIn On phoTO.
Then I RemOve The chaiN tool anD Do tHe FOLLoWing:

with my hands I beNd THE cHain lateRally (aT ThE dIRection wHeRe iT's noT BEndinG) milDLy Back and fOrth a cOUpLe Of times. thAt is thE rEd aRroWs on tHE phoTo.
I turN the link ComplETelly to one side ANd to the other (aT ThE DIrECtioN thAt the chain iS benDIng) tO makE SuRe tHAt the MovemEnT Is COmplete and safe. That iS tHe greeN arroWs on the photo.
I Apply 2 drops OF OIl on the lInk tHAt i'Ve worked on.
redo Step 3 oNce, check agAIn
done

ThAt ensUres that The metals ON The link (I Don'T knOw tHe eXACt Terminology of THE parTs) Do not reMaiN "packed" TogEthEr aNd tHe Link is not Stiff. If I DoN't Do ThIs I'M afraID that wheN iT beCoMes "UnstiFF" and thE metaLs arE uNpACkeD, the pin MAy NOT be iN tHe 100% PerfEct PoSitioN and THis May causE a problem LatER on wHeN pEdaling Hard. The worst pRoBlem could bE tHat The chaIN Would breAk while riding
, PlotPoints -> 100] & /@{x, y};
m= Map [k,  (L is t @@ @ Im ageData@#), {2 } ] &/@ c;
GraphicsRow[Join [c, { Im a ge@M a p[ f, Ma pThread [ Ma x ,  m,  2 ],  {2 }] } ]] 

Alt hou gh I th ink thereisst ill a smallp ro blem in th e i nterpolation  in  the m id dle of th e m ax zo nes.
A :

Yes , you can  u s e Imag e Apply.F o rexam ple, if img1 andi mg 2  are two image s of t he sa m e  si ze,  then 
Ima ge Apply [ Max, {i m g1 , i mg2 } ]

takes themax of each cha nnel.
Q:Questi on ab ou t  ch ain re-atta chin g

I have  a que s tion ab o ut chai n "clo sin g"(not su re  of  t h e e n gl ish wor d, but y ou  g et it , ri g h t ? ).
I  kn ow h ow to  open a chain  wi th a cha in to ol, a nd I  k now I  mustnot " go  too far" as to  rem ove the r ive tfro mthe o u tsidehol e.And I c onsider I h av e g on e far enough whenth e ch ain canbe ope n ed .S o it's p re tty  str a i ghtfo rwar d .But when  closi n gachain,ho w do I  k now  Iwent" farenough "?

A:
I pus h  the pin to it ' s 100% correc t  p o s it i on ( sim ilar to oth er p i ns)and1 /1 0 o f  a mm  more .A ss u me blue pin on phot o. 
ThenI rem ove the chain  tool andd o the foll owin g :with my handsI ben d the chai n  lateral ly (a t the di rection w h e re it'snot  be ndi ng) m il dly back andf o rthacoupleoftimes.Tha t i s t here d arrowson the p ho to .Itur n the link com pl ete ll y t o one side a nd to  the  o th e r ( at thed ir e c tion  t ha t th e c ha in is  ben d ing ) to ma ke sure t hat themo ve ment is  complete and  s afe. Thatis  th e gree n arrows o n the photo.
I apply 2d rops of  oi l onthelink that  I' ve wor ked on.
re do ste p 3 o nc e,c h eck a g a in 
do ne 

That ens u r esthatth e me tals on  the link (I don't kno w the exact t erm inol o g yoft he par ts )  do n ot remain "pack ed" togeth er an d the link isno t stiff . If Idon't do this  I'm afra id that w he n it b eco mes "unsti ff" andthe metal s  areu np acked , t he pin  m aynot b e in t h e 1 00% p erfect  p ositio n and  t his maycause a problem later o n when  peda lin g hard. T hew ors t problem  cou ld be that  th e c hainwou l d bre ak w h il e r i ding
, PlotPoints_-> 100]_& /@ {x, y};
m_= Map[k,_(List_@@@ ImageData@#),_{2}]_& /@ c;
GraphicsRow[Join[c,_{Image@Map[f, MapThread[Max, m,_2], {2}]}]]

Although I think_there is still_a_small problem in the interpolation in the middle of the max zones.

A:

Yes, you can_use_ImageApply. For_example,_if_img1 and img2 are two_images of the same size,_then 
ImageApply[Max,_{img1, img2}]

takes the max of each channel.

 Q:

Question_about_chain re-attaching

I have_a question about chain "closing" (not sure of the_english word, but you get it,_right?).
I know how_to_open_a chain with a_chain tool, and I know I_must not "go too far" as_to remove the rivet from the outside_hole. And I consider I have_gone far enough when the_chain can_be opened. So it's pretty_straightforward.
But when closing_a chain,_how do I_know I went "far enough"?

A:

I push_the pin to_it's 100% correct position (similar to_other_pins) and 1/10_of_a_mm more._Assume blue pin_on_photo.
Then I_remove_the chain tool and do the_following:

with_my hands I bend the chain laterally_(at the direction where_it's_not bending) mildly back_and forth a couple of_times. That is the red arrows_on the_photo.
I turn_the link completelly to one side and to the other (at_the direction that the chain is_bending) to make sure_that the_movement_is complete and_safe._That is_the green arrows on the photo.
I apply_2 drops_of oil on the link that_I've worked on.
redo step_3_once, check again
done

That ensures that the_metals on the link (I don't_know the exact terminology of_the_parts)_do not remain "packed" together_and the link is not stiff._If I don't_do this I'm afraid that when it_becomes_"unstiff" and the metals are unpacked,_the_pin may not be in the_100%_perfect_position and this may cause_a problem later on when pedaling_hard. The worst problem could be that the chain_would break while_riding